Merge pull request 'fix: keep systemd's OSC 3008 shell context out of command output (#41)' (#42) from fix/osc-context-41 into main

The prompt-hook step (#41) pushed linux.py past its line count in the
quality baseline. The three steps that make netmiko's fresh shell fit to
read - history off, prompt hooks off, no line wrap - and the prompt
pattern move to napalm_linux/_shell.py, under strict mypy. linux.py
shrinks below where it was; the baseline follows.

.gitea/workflows/ci.yml

@@ -0,0 +1,17 @@
+name: CI
+
+on:
+  push:
+    branches: [main, master]
+    tags: ["v*"]
+  pull_request:
+
+jobs:
+  driver:
+    uses: NAPALM/driver-standard/.gitea/workflows/driver.yml@main
+    with:
+      standard-ref: main
+      # Until napalm-device-types 4.22.0 (AptProxyMixin, #53) is on PyPI.
+      pre-install: "git+https://git.netork.io/NAPALM/napalm-device-types.git"
+    secrets:
+      PYPI_TOKEN: ${{ secrets.PYPI_TOKEN }}

.github/workflows/ci.yml

@@ -1,48 +0,0 @@
-name: CI
-
-on:
-  push:
-    branches: ["**"]
-  pull_request:
-    branches: ["**"]
-
-jobs:
-  test:
-    runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        python-version: ["3.10", "3.11", "3.12"]
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-
-      - name: Setup Python
-        uses: actions/setup-python@v5
-        with:
-          python-version: ${{ matrix.python-version }}
-          cache: pip
-
-      - name: Install package with dev extras
-        run: |
-          python -m pip install --upgrade pip
-          # napalm-device-types lives in git.netork.io/NAPALM, not on PyPI: without this
-          # pip looks there, finds an unrelated 0.1.0 and the job dies before any test.
-          python -m pip install "napalm-device-types @ git+https://git.netork.io/NAPALM/napalm-device-types.git"
-          python -m pip install -e ".[dev]"
-
-      - name: Run unit tests
-        run: |
-          python -m pytest -q --tb=short
-
-      - name: Build wheel and sdist
-        run: |
-          python -m pip install build
-          python -m build
-
-      - name: Upload dist artifacts
-        # v4 refuses to run on Gitea ("not currently supported on GHES").
-        uses: actions/upload-artifact@v3
-        with:
-          name: dist-${{ matrix.python-version }}
-          path: dist/*

CHANGELOG.md

@@ -7,7 +7,33 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.15.1] - 2026-10-23
+
+### Fixed
+- Ubuntu 26.04 hosts could not be polled (#41). systemd 258's
+  `/etc/profile.d/80-systemd-osc-context.sh` wraps every command of an interactive bash
+  in OSC 3008 sequences, so they ended up in every value read through the shell, the
+  prompt line with them: `os_version` grew past 255 characters. The session now unsets
+  `PS0` and `PROMPT_COMMAND` right after switching the history off and reads its prompt
+  anew, and `_send()` strips terminal codes from what it returns.
+
+## [0.15.0] - 2026-10-23
+
+The first release on PyPI. It collects everything since 0.4.0, which was the last version recorded here.
+
+### Changed
+- The driver follows the NAPALM driver standard
+  (https://git.netork.io/NAPALM/driver-standard): CI on Gitea runs ruff, mypy, the
+  tests on Python 3.10–3.13 and at the lowest declared versions, bandit, pip-audit and
+  a build check, and a release tag publishes to PyPI. The package now ships `py.typed`
+  and a LICENSE file. **Python 3.9 is no longer supported**; napalm-device-types never
+  ran on it.
+- Exceptions the driver deliberately ignores (the PTY width at login, closing a dead
+  session, unreadable route lines, the snmpd.conf community and port) are now logged
+  at debug level.
+
 ### Added
+- apt's proxy through napalm-device-types' `AptProxyMixin` (NetOrk/netork#1397). `get_package_proxy()` is what `apt-config dump` says, not `00proxy` alone: a proxy in `90curtin-aptproxy` or `/etc/apt/apt.conf` wins over it, and was missed. New: `get_package_proxy_report()` (every line that sets it, per-host overrides, the https sources) and `check_package_proxy(url, expect)` (a fetch with `apt-helper`, past any proxy). `configure_package_proxy(url)` now also comments out other proxy lines, reads the result back and fetches one `InRelease` through the proxy; it fails when apt still fetches elsewhere. Reads run on the exec channel. Requires napalm-device-types 4.22.0; version 0.14.0.
 - `get_host_firewall()` (napalm-device-types' `HostFirewallMixin`, NetOrk/netork#1344): the host's own netfilter rules — `nft -j list ruleset`, with the tables iptables manages taken from `iptables-save` — as chains and rules in one shape. Read-only, as root, on an exec channel (the nft JSON is one long line). Requires napalm-device-types 4.21.0; version 0.13.0.
 - `get_service_packages()` (napalm-device-types' `ServicePackagesMixin`, NetOrk/netork#1236): which installed packages each systemd service is made of — the one shipping its unit file and the one shipping its `ExecStart` binary. Read-only, on an exec channel under `sh`, without sudo. Requires napalm-device-types 4.20.0; version 0.12.0.
 

LICENSE

@@ -0,0 +1,191 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship made available under
+      the License, as indicated by a copyright notice that is included in
+      or attached to the work (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other transformations
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean, as submitted to the Licensor for inclusion
+      in the Work by the copyright owner or by an individual or Legal Entity
+      authorized to submit on behalf of the copyright owner. For the purposes
+      of this definition, "submitted" means any form of electronic, verbal,
+      or written communication sent to the Licensor or its representatives,
+      including but not limited to communication on electronic mailing lists,
+      source code control systems, and issue tracking systems that are managed
+      by, or on behalf of, the Licensor for the purpose of discussing and
+      improving the Work, but excluding communication that is conspicuously
+      marked or designated in writing by the copyright owner as "Not a
+      Contribution."
+
+      "Contributor" shall mean Licensor and any Legal Entity on behalf of
+      whom a Contribution has been received by the Licensor and incorporated
+      within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by the combined Contribution(s) and the Work
+      to which such Contribution(s) was submitted. If You institute patent
+      litigation against any entity (including a cross-claim or counterclaim
+      in a lawsuit) alleging that the Work or any Contribution embodied
+      within the Work constitutes direct or contributory patent infringement,
+      then any patent licenses granted to You under this License for that
+      Work shall terminate as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or Derivative
+          Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, You must include a readable copy of the
+          attribution notices contained within such NOTICE file, in
+          at least one of the following places: within a NOTICE text file
+          distributed as part of the Derivative Works; within the Source
+          form or documentation, if provided along with the Derivative
+          Works; or, within a display generated by the Derivative Works,
+          if and wherever such third-party notices normally appear. The
+          contents of the NOTICE file are for informational purposes only
+          and do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own license statement for Your modifications and
+      may provide additional grant of rights to use, copy, modify, merge,
+      publish, distribute, sublicense, and/or sell copies of the Work,
+      and to permit persons to whom the Work is furnished to do so,
+      subject to the following conditions:
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any conditions of TITLE,
+      MERCHANTIBILITY, or FITNESS FOR A PARTICULAR PURPOSE.
+      See the License for the specific language governing permissions and
+      limitations under the License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or exemplary damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (even if such Contributor has been advised of the possibility
+      of such damages).
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may offer only
+      conditions consistent with this License, subject to the following
+      additional conditions:
+
+      (a) You may offer additional warranty, indemnity, or other liability
+          terms and conditions; and
+
+      (b) You may offer support for the Work in return for a fee.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format in question. It may also be
+      possible to make it available with a creative commons license.
+
+   Copyright 2026 Christian Manivong
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

README.md

@@ -24,7 +24,7 @@ pip install napalm napalm-linux
 Or from source:
 
 ```bash
-git clone https://github.com/chrismanivong/napalm-linux
+git clone https://git.netork.io/NAPALM/napalm-linux
 pip install -e napalm-linux/
 ```
 
@@ -58,11 +58,11 @@ with Driver(
 
     # OS-specific methods (from napalm-device-types OSDriver)
     packages = dev.get_packages()
-    updates  = dev.get_pending_updates()
+    updates = dev.get_pending_updates()
     services = dev.get_services()
-    users    = dev.get_os_users()
+    users = dev.get_os_users()
-    procs    = dev.get_processes()
+    procs = dev.get_processes()
-    jobs     = dev.get_cron_jobs()
+    jobs = dev.get_cron_jobs()
 
     # Upgrade specific packages
     result = dev.apply_updates(["openssh-server", "curl"])
@@ -121,7 +121,7 @@ apt → dnf → yum → apk → pacman
 Force a specific package manager:
 
 ```python
-optional_args={"pkg_manager": "dnf"}
+optional_args = {"pkg_manager": "dnf"}
 ```
 
 ## SSH user permissions

napalm_linux/_shell.py

@@ -0,0 +1,54 @@
+"""The interactive shell netmiko opens, made fit to be read before the first command."""
+
+from __future__ import annotations
+
+import logging
+from typing import Any
+
+logger = logging.getLogger(__name__)
+
+#: The end of a command's output when nothing better is known: a line that looks
+#: like a shell prompt.
+PROMPT_RE = r"[#$\>]\s*$"
+
+#: Sent before anything else in the interactive session (NetOrk/netork#1039):
+#: the shell writes no history file and records nothing more. The leading space
+#: keeps this line itself out of a history under ``HISTCONTROL=ignorespace``;
+#: a shell without ``set -o history`` (dash) only complains, to /dev/null.
+HISTORY_OFF = " unset HISTFILE; set +o history 2>/dev/null; true"
+
+#: Sent right after ``HISTORY_OFF`` (#41): systemd 258's
+#: ``/etc/profile.d/80-systemd-osc-context.sh`` wraps every command in OSC 3008
+#: sequences from ``PS0`` and ``PROMPT_COMMAND``, each with a fresh UUID. It appends
+#: to ``PROMPT_COMMAND`` as an array, so only ``unset`` removes its hook.
+PROMPT_HOOKS_OFF = " unset PS0 PROMPT_COMMAND; true"
+
+#: Keeps the PTY from wrapping long output lines (e.g. docker JSON).
+NO_LINE_WRAP = "stty cols 10000 2>/dev/null || true"
+
+
+def prepare_shell(device: Any, hostname: str) -> None:
+    """Make netmiko's fresh shell *device* fit to read, one step at a time.
+
+    A step the shell refuses is logged and skipped: none of them is worth
+    failing the connection for.
+    """
+    # No history before anything else is typed (NetOrk/netork#1039).
+    try:
+        device.send_command(HISTORY_OFF, expect_string=PROMPT_RE)
+    except Exception:
+        logger.debug("Could not switch the shell history off on %s", hostname, exc_info=True)
+
+    # No systemd OSC 3008 context around every command (#41). netmiko learned
+    # the prompt with those sequences in front, and a prompt carrying a fresh
+    # UUID never matches again, so it reads the prompt anew once they are gone.
+    try:
+        device.send_command(PROMPT_HOOKS_OFF, expect_string=PROMPT_RE)
+        device.set_base_prompt()
+    except Exception:
+        logger.debug("Could not switch the prompt hooks off on %s", hostname, exc_info=True)
+
+    try:
+        device.send_command(NO_LINE_WRAP, expect_string=PROMPT_RE)
+    except Exception:
+        logger.debug("%s: ignored", hostname, exc_info=True)

pyproject.toml

@@ -1,14 +1,14 @@
 [build-system]
-requires = ["setuptools>=68", "wheel"]
+requires = ["setuptools>=77"]
 build-backend = "setuptools.build_meta"
 
 [project]
 name = "napalm-linux"
-version = "0.13.0"
+version = "0.15.1"
 description = "NAPALM driver for generic Linux systems via SSH"
 readme = "README.md"
-requires-python = ">=3.9"
+requires-python = ">=3.10"
-license = { text = "Apache-2.0" }
+license = "Apache-2.0"
 authors = [
     { name = "Christian Manivong", email = "christian@manivong.de" },
 ]
@@ -24,43 +24,77 @@ classifiers = [
     "Development Status :: 3 - Alpha",
     "Intended Audience :: Developers",
     "Intended Audience :: System Administrators",
-    "License :: OSI Approved :: Apache Software License",
     "Operating System :: OS Independent",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
     "Topic :: System :: Networking",
     "Topic :: System :: Systems Administration",
     "Typing :: Typed",
 ]
 dependencies = [
     "napalm>=4.0",
-    "napalm-device-types>=4.21.0",
+    "napalm-device-types>=4.22.0",
     "netmiko>=4.0.0",
     "paramiko>=5.0.0",  # CVE-2026-44405
 ]
 
 [project.optional-dependencies]
 dev = [
-    "pytest",
+    "pytest>=8",
-    "pytest-cov",
+    "pytest-cov>=5",
-    "black",
+    "ruff>=0.6",
-    "ruff",
+    "mypy>=1.11",
-    "mypy",
 ]
 
 [project.entry-points."napalm.drivers"]
 linux = "napalm_linux:LinuxDriver"
 
 [project.urls]
-Repository = "https://github.com/chrismanivong/napalm-linux"
+Repository = "https://git.netork.io/NAPALM/napalm-linux"
+Issues = "https://git.netork.io/NAPALM/napalm-linux/issues"
+Changelog = "https://git.netork.io/NAPALM/napalm-linux/src/branch/main/CHANGELOG.md"
 
 [tool.setuptools.packages.find]
 where = ["."]
 include = ["napalm_linux*"]
 
+[tool.setuptools.package-data]
+napalm_linux = ["py.typed"]
+
 [tool.ruff]
 line-length = 100
-target-version = "py39"
+target-version = "py310"
+
+[tool.ruff.lint]
+select = ["E", "F", "I", "UP", "B"]
+
+[tool.ruff.lint.per-file-ignores]
+# Recorded device output keeps its lines.
+"tests/**" = ["E501"]
+
+[tool.mypy]
+python_version = "3.10"
+strict = true
+# napalm itself is untyped, so every driver subclasses Any.
+disallow_subclassing_any = false
+
+[[tool.mypy.overrides]]
+module = ["napalm.*", "netmiko.*", "paramiko.*"]
+ignore_missing_imports = true
+
+[[tool.mypy.overrides]]
+# Not yet under strict mypy (quality baseline); may only shrink.
+module = ["napalm_linux.linux"]
+ignore_errors = true
+
+[tool.pytest.ini_options]
+testpaths = ["tests"]
+
+[tool.coverage.run]
+source = ["napalm_linux"]
+
+[tool.coverage.report]
+fail_under = 57

tests/quality_baseline.json

@@ -0,0 +1,28 @@
+{
+ "coverage_floor": 57.0,
+ "function_complexity": {
+  "napalm_linux/linux.py::LinuxDriver._collect_platform_info": 24,
+  "napalm_linux/linux.py::LinuxDriver._parse_cron_line": 12,
+  "napalm_linux/linux.py::LinuxDriver.get_networks": 13,
+  "napalm_linux/linux.py::LinuxDriver.get_route_to": 23,
+  "napalm_linux/linux.py::LinuxDriver.get_snmp_config": 13,
+  "napalm_linux/linux.py::LinuxDriver.get_vpn_tunnels": 28,
+  "napalm_linux/linux.py::LinuxDriver.search_packages": 26
+ },
+ "function_lines": {
+  "napalm_linux/linux.py::LinuxDriver._collect_platform_info": 106,
+  "napalm_linux/linux.py::LinuxDriver.get_networks": 52,
+  "napalm_linux/linux.py::LinuxDriver.get_route_to": 138,
+  "napalm_linux/linux.py::LinuxDriver.get_vpn_tunnels": 152,
+  "napalm_linux/linux.py::LinuxDriver.ping": 52,
+  "napalm_linux/linux.py::LinuxDriver.search_packages": 106,
+  "napalm_linux/linux.py::LinuxDriver.uninstall_package": 51
+ },
+ "mypy_relaxed": [
+  "napalm_linux.linux"
+ ],
+ "python_file_lines": {
+  "napalm_linux/linux.py": 2288
+ },
+ "untyped_public": []
+}

tests/test_command_channel.py

@@ -70,7 +70,9 @@ class FakeTransport:
 def _driver(*, root=False, sudo_password=None):
     driver = LinuxDriver("h", "u", "p", optional_args={"sudo_password": sudo_password})
     transport = FakeTransport()
-    driver._device = SimpleNamespace(remote_conn_pre=SimpleNamespace(get_transport=lambda: transport))
+    driver._device = SimpleNamespace(
+        remote_conn_pre=SimpleNamespace(get_transport=lambda: transport)
+    )
     driver._root = root
     return driver, transport
 

tests/test_fix_templates.py

@@ -123,21 +123,72 @@ class TestSnmpAgentSteps:
         driver._install_file_as_root.assert_not_called()
 
 
+_REPORT = (
+    "APROXY_BEGIN\n[dump]\n{dump}[parts]\n{parts}[main]\n[sources]\n"
+    "http://deb.debian.org/debian/dists/trixie/\nAPROXY_END\n"
+)
+
+
+def _host(driver, proxy="", parts="", fetched=0):
+    """What the host answers on the exec channel: apt's report, then a fetch."""
+    ran: list[str] = []
+
+    def run_command(command, *, privileged=False, timeout=60, stdin=None):
+        ran.append(command)
+        if "apt-config dump" in command:
+            dump = f'Acquire::http::Proxy "{proxy}";\n' if proxy else ""
+            return MagicMock(exit_code=0, stdout=_REPORT.format(dump=dump, parts=parts), stderr="")
+        out = f"APROXY_BEGIN\n[fetch]\nGet:1 x\n[rc]\n{fetched}\nAPROXY_END\n"
+        return MagicMock(exit_code=0, stdout=out, stderr="")
+
+    driver.run_command = run_command
+    return ran
+
+
 class TestPackageProxyAndEngineAccess:
     def test_the_proxy_is_the_caller_s(self, driver):
         driver._install_file_as_root = MagicMock(
             return_value=MagicMock(exit_code=0, stdout="", stderr="")
         )
+        _host(driver, proxy="http://cache.lan:3142")
 
         result = driver.configure_package_proxy("http://cache.lan:3142")
 
-        assert result["success"] is True
+        assert result["success"] is True, result["output"]
         path, content = driver._install_file_as_root.call_args.args
         assert (path, content) == (
             "/etc/apt/apt.conf.d/00proxy",
             'Acquire::http::Proxy "http://cache.lan:3142";\n',
         )
 
+    def test_it_reads_back_and_fetches_through_it(self, driver):
+        driver._install_file_as_root = MagicMock(
+            return_value=MagicMock(exit_code=0, stdout="", stderr="")
+        )
+        ran = _host(driver, proxy="http://cache.lan:3142")
+
+        result = driver.configure_package_proxy("http://cache.lan:3142")
+
+        assert [s["step"] for s in result["steps"]] == ["configure", "conflicts", "verify", "fetch"]
+        assert any("dists/trixie/InRelease" in c for c in ran)
+
+    def test_another_file_s_proxy_is_commented_out_as_root(self, driver):
+        driver._install_file_as_root = MagicMock(
+            return_value=MagicMock(exit_code=0, stdout="", stderr="")
+        )
+        _host(
+            driver,
+            proxy="http://cache.lan:3142",
+            parts='/etc/apt/apt.conf.d/90curtin-aptproxy:1:Acquire::http::Proxy "http://old:3128";\n',
+        )
+        ran = []
+        driver._sudo_status = lambda command, read_timeout=100: ran.append(command) or ("", 0)
+
+        driver.configure_package_proxy("http://cache.lan:3142")
+
+        assert ran and ran[0].startswith("sed -i -e '1{")
+        assert ran[0].endswith("/etc/apt/apt.conf.d/90curtin-aptproxy")
+
     def test_a_proxy_url_that_would_break_the_file_is_refused(self, driver):
         driver._install_file_as_root = MagicMock()
 
@@ -151,6 +202,15 @@ class TestPackageProxyAndEngineAccess:
 
         assert driver.configure_package_proxy("http://cache.lan:3142")["success"] is False
 
+    def test_the_proxy_answers_past_apt_s_proxy(self, driver):
+        out = "APROXY_BEGIN\n[fetch]\nGet:1 x\n[rc]\n0\n[match]\n3\nAPROXY_END\n"
+        driver.run_command = MagicMock(return_value=MagicMock(exit_code=0, stdout=out, stderr=""))
+
+        result = driver.check_package_proxy("http://c:3142/acng-report.html", expect="Cache")
+
+        assert result == {"reachable": True, "expected": True, "error": ""}
+        assert "Proxy::c=DIRECT" in driver.run_command.call_args.args[0]
+
     def test_engine_access_for_the_user_the_caller_names(self, driver):
         ran = []
         driver._sudo_status = lambda command, read_timeout=100: ran.append(command) or ("", 0)
@@ -188,7 +248,7 @@ def test_every_annotation_resolves():
     import inspect
     import typing
 
-    for name, member in inspect.getmembers(LinuxDriver, inspect.isfunction):
+    for _name, member in inspect.getmembers(LinuxDriver, inspect.isfunction):
         if member.__module__ == "napalm_linux.linux":
             typing.get_type_hints(member)
 
@@ -203,7 +263,9 @@ class TestManagementPeer:
         return d
 
     def test_the_client_side_of_ssh_connection(self):
-        assert self._driver("10.7.224.20 51234 10.0.0.5 22\n").get_management_peer() == "10.7.224.20"
+        assert (
+            self._driver("10.7.224.20 51234 10.0.0.5 22\n").get_management_peer() == "10.7.224.20"
+        )
 
     def test_an_ipv6_client(self):
         assert self._driver("fd00::20 51234 fd00::5 22\n").get_management_peer() == "fd00::20"
@@ -220,16 +282,26 @@ class TestFactsNotWarnings:
         assert "get_device_warnings" not in vars(LinuxDriver)
 
     def test_the_package_proxy_apt_fetches_through(self, driver):
-        driver._send = lambda command, read_timeout=100: 'Acquire::http::Proxy "http://c:3142";'
+        _host(driver, proxy="http://c:3142")
         assert driver.get_package_proxy() == "http://c:3142"
 
     def test_no_proxy_set(self, driver):
-        driver._send = lambda command, read_timeout=100: ""
+        _host(driver)
         assert driver.get_package_proxy() is None
 
+    def test_where_apt_s_proxy_is_set(self, driver):
+        _host(
+            driver,
+            proxy="http://old:3128",
+            parts='/etc/apt/apt.conf.d/90curtin-aptproxy:1:Acquire::http::Proxy "http://old:3128";\n',
+        )
+        report = driver.get_package_proxy_report()
+        assert report["settings"][0]["file"] == "/etc/apt/apt.conf.d/90curtin-aptproxy"
+
     def test_not_an_apt_host(self, driver):
         driver._pkg_manager = "dnf"
         assert driver.get_package_proxy() is None
+        assert driver.get_package_proxy_report() is None
 
     def test_the_applications_proxy_url_is_no_argument_any_more(self):
         d = LinuxDriver("h", "admin", "p", optional_args={"apt_proxy_url": "http://c:3142"})

tests/test_linux.py

@@ -1,9 +1,10 @@
 """Unit tests for LinuxDriver – parsing helpers (no real SSH connection needed)."""
 
 import re
+from unittest.mock import MagicMock, patch
 
 import pytest
-from unittest.mock import MagicMock, patch
+
 from napalm_linux.linux import (
     _YUM_SECURITY_COMMAND,
     LinuxDriver,
@@ -11,7 +12,6 @@ from napalm_linux.linux import (
     _split_status,
 )
 
-
 # ---------------------------------------------------------------------------
 # Fixture – driver without a real connection
 # ---------------------------------------------------------------------------
@@ -327,11 +327,7 @@ PASSWD_OUT = (
     "daemon:x:1:1:daemon:/usr/sbin:/usr/sbin/nologin\n"
 )
 
-GROUP_OUT = (
+GROUP_OUT = "sudo:x:27:admin\ndocker:x:999:admin\nadm:x:4:admin\n"
-    "sudo:x:27:admin\n"
-    "docker:x:999:admin\n"
-    "adm:x:4:admin\n"
-)
 
 
 def test_get_os_users(driver):
@@ -477,8 +473,7 @@ DNF_UPGRADE_SUCCESS = (
 )
 
 DNF_UPGRADE_ERROR = (
-    "Last metadata expiration check: 0:01:23 ago.\n"
+    "Last metadata expiration check: 0:01:23 ago.\nError: No match for argument: nonexistent-pkg\n"
-    "Error: No match for argument: nonexistent-pkg\n"
 )
 
 
@@ -532,6 +527,7 @@ def test_type_label_is_linux():
 
 def test_type_label_overrides_os_driver():
     from napalm_device_types import OSDriver
+
     assert OSDriver.TYPE_LABEL == "OS"
     assert LinuxDriver.TYPE_LABEL != OSDriver.TYPE_LABEL
 
@@ -555,18 +551,31 @@ def _dmi_output(
     # Mirrors the real shell output: DMIBEGIN sentinel followed by 9 fields.
     # The sentinel prevents _send()'s .strip() from eating leading blank lines
     # (which occur on ARM where all DMI files are absent).
-    return "\n".join([
+    return "\n".join(
-        "DMIBEGIN",
+        [
-        sys_vendor, product_name, product_version, product_serial,
+            "DMIBEGIN",
-        product_uuid, detect_virt, dt_model, cpuinfo_serial, cpuinfo_model,
+            sys_vendor,
-    ])
+            product_name,
+            product_version,
+            product_serial,
+            product_uuid,
+            detect_virt,
+            dt_model,
+            cpuinfo_serial,
+            cpuinfo_model,
+        ]
+    )
 
 
 class TestCollectPlatformInfo:
     def test_baremetal_dell(self, driver):
         raw = _dmi_output(
-            "Dell Inc.", "PowerEdge R720", "Not Specified", "ABC123",
+            "Dell Inc.",
-            "8a2e3f00-dead-beef-0000-123456789abc", "none",
+            "PowerEdge R720",
+            "Not Specified",
+            "ABC123",
+            "8a2e3f00-dead-beef-0000-123456789abc",
+            "none",
         )
         with patch.object(driver, "_send", return_value=raw):
             info = driver._collect_platform_info()
@@ -577,8 +586,12 @@ class TestCollectPlatformInfo:
 
     def test_baremetal_lenovo_product_version_preferred(self, driver):
         raw = _dmi_output(
-            "LENOVO", "10M8000VUS", "ThinkCentre M910x", "MP1234",
+            "LENOVO",
-            "8a2e3f00-dead-beef-0000-123456789abc", "none",
+            "10M8000VUS",
+            "ThinkCentre M910x",
+            "MP1234",
+            "8a2e3f00-dead-beef-0000-123456789abc",
+            "none",
         )
         with patch.object(driver, "_send", return_value=raw):
             info = driver._collect_platform_info()
@@ -589,8 +602,12 @@ class TestCollectPlatformInfo:
 
     def test_vm_kvm(self, driver):
         raw = _dmi_output(
-            "QEMU", "Standard PC (i440FX + PIIX, 1996)", "pc-i440fx-9.1", "",
+            "QEMU",
-            "4c4c4544-0000-2010-8020-b4c04f534a31", "kvm",
+            "Standard PC (i440FX + PIIX, 1996)",
+            "pc-i440fx-9.1",
+            "",
+            "4c4c4544-0000-2010-8020-b4c04f534a31",
+            "kvm",
         )
         with patch.object(driver, "_send", return_value=raw):
             info = driver._collect_platform_info()
@@ -601,8 +618,12 @@ class TestCollectPlatformInfo:
 
     def test_vm_vmware(self, driver):
         raw = _dmi_output(
-            "VMware, Inc.", "VMware Virtual Platform", "None", "VMware-42 12 34 56",
+            "VMware, Inc.",
-            "4244560c-dead-beef-0000-abcdef123456", "vmware",
+            "VMware Virtual Platform",
+            "None",
+            "VMware-42 12 34 56",
+            "4244560c-dead-beef-0000-abcdef123456",
+            "vmware",
         )
         with patch.object(driver, "_send", return_value=raw):
             info = driver._collect_platform_info()
@@ -613,8 +634,12 @@ class TestCollectPlatformInfo:
 
     def test_vm_hyperv(self, driver):
         raw = _dmi_output(
-            "Microsoft Corporation", "Virtual Machine", "Hyper-V UEFI Release v4.1", "",
+            "Microsoft Corporation",
-            "7C5B4B1F-1234-5678-ABCD-000000000001", "microsoft",
+            "Virtual Machine",
+            "Hyper-V UEFI Release v4.1",
+            "",
+            "7C5B4B1F-1234-5678-ABCD-000000000001",
+            "microsoft",
         )
         with patch.object(driver, "_send", return_value=raw):
             info = driver._collect_platform_info()
@@ -625,8 +650,12 @@ class TestCollectPlatformInfo:
 
     def test_junk_dmi_values_filtered(self, driver):
         raw = _dmi_output(
-            "To Be Filled By O.E.M.", "To Be Filled By O.E.M.", "Not Specified",
+            "To Be Filled By O.E.M.",
-            "To Be Filled By O.E.M.", "", "none",
+            "To Be Filled By O.E.M.",
+            "Not Specified",
+            "To Be Filled By O.E.M.",
+            "",
+            "none",
         )
         with patch.object(driver, "_send", return_value=raw):
             info = driver._collect_platform_info()
@@ -637,8 +666,12 @@ class TestCollectPlatformInfo:
     def test_vm_kvm_fallback_via_dmi_when_detect_virt_unavailable(self, driver):
         # systemd-detect-virt returns "none" (not installed), sys_vendor reveals QEMU
         raw = _dmi_output(
-            "QEMU", "Standard PC (i440FX + PIIX, 1996)", "", "",
+            "QEMU",
-            "4c4c4544-0000-2010-8020-b4c04f534a31", "none",
+            "Standard PC (i440FX + PIIX, 1996)",
+            "",
+            "",
+            "4c4c4544-0000-2010-8020-b4c04f534a31",
+            "none",
         )
         with patch.object(driver, "_send", return_value=raw):
             info = driver._collect_platform_info()
@@ -648,8 +681,12 @@ class TestCollectPlatformInfo:
 
     def test_container_docker(self, driver):
         raw = _dmi_output(
-            "QEMU", "Standard PC (i440FX + PIIX, 1996)", "", "",
+            "QEMU",
-            "4c4c4544-0000-2010-8020-b4c04f534a31", "docker",
+            "Standard PC (i440FX + PIIX, 1996)",
+            "",
+            "",
+            "4c4c4544-0000-2010-8020-b4c04f534a31",
+            "docker",
         )
         with patch.object(driver, "_send", return_value=raw):
             info = driver._collect_platform_info()
@@ -674,7 +711,12 @@ class TestCollectPlatformInfo:
 
     def test_arm_device_tree_fallback(self, driver):
         raw = _dmi_output(
-            "", "", "", "", "", "none",
+            "",
+            "",
+            "",
+            "",
+            "",
+            "none",
             dt_model="Raspberry Pi 4 Model B Rev 1.4",
             cpuinfo_serial="100000002a6d96dc",
             cpuinfo_model="Raspberry Pi 4 Model B Rev 1.4",
@@ -688,7 +730,12 @@ class TestCollectPlatformInfo:
 
     def test_arm_cpuinfo_model_when_no_dt(self, driver):
         raw = _dmi_output(
-            "", "", "", "", "", "none",
+            "",
+            "",
+            "",
+            "",
+            "",
+            "none",
             dt_model="",
             cpuinfo_serial="0000000012345678",
             cpuinfo_model="Raspberry Pi 3 Model B Plus Rev 1.3",
@@ -713,7 +760,12 @@ class TestCollectPlatformInfo:
         # d="none\nnone" which shifted subsequent lines off by one.
         # With the ${d:-none} fix this no longer happens.
         raw = _dmi_output(
-            "", "", "", "", "", "none",
+            "",
+            "",
+            "",
+            "",
+            "",
+            "none",
             dt_model="",
             cpuinfo_serial="0000000012345678",
             cpuinfo_model="Raspberry Pi 3 Model B Rev 1.2",
@@ -726,8 +778,12 @@ class TestCollectPlatformInfo:
 
     def test_arm_fallback_ignored_when_dmi_present(self, driver):
         raw = _dmi_output(
-            "Dell Inc.", "PowerEdge R720", "Not Specified", "XYZ999",
+            "Dell Inc.",
-            "8a2e3f00-dead-beef-0000-123456789abc", "none",
+            "PowerEdge R720",
+            "Not Specified",
+            "XYZ999",
+            "8a2e3f00-dead-beef-0000-123456789abc",
+            "none",
             dt_model="some-dt-model",
             cpuinfo_serial="deadbeef",
             cpuinfo_model="some cpuinfo model",
@@ -744,20 +800,23 @@ class TestCollectPlatformInfo:
 # ---------------------------------------------------------------------------
 
 
-@pytest.mark.parametrize("model,expected", [
+@pytest.mark.parametrize(
-    ("Raspberry Pi 4 Model B Rev 1.4",     "Raspberry Pi Foundation"),
+    "model,expected",
-    ("Raspberry Pi 3 Model B Rev 1.2",     "Raspberry Pi Foundation"),
+    [
-    ("ODROID-N2L",                          "Hardkernel"),
+        ("Raspberry Pi 4 Model B Rev 1.4", "Raspberry Pi Foundation"),
-    ("NVIDIA Jetson Nano Developer Kit",    "NVIDIA"),
+        ("Raspberry Pi 3 Model B Rev 1.2", "Raspberry Pi Foundation"),
-    ("Rock Pi 4C",                          "Radxa"),
+        ("ODROID-N2L", "Hardkernel"),
-    ("Orange Pi 5 Plus",                    "Xunlong Software"),
+        ("NVIDIA Jetson Nano Developer Kit", "NVIDIA"),
-    ("Banana Pi BPI-R3",                    "SinoVoip"),
+        ("Rock Pi 4C", "Radxa"),
-    ("NanoPi R4S",                          "FriendlyElec"),
+        ("Orange Pi 5 Plus", "Xunlong Software"),
-    ("PINE64 RockPro64",                    "Pine64"),
+        ("Banana Pi BPI-R3", "SinoVoip"),
-    ("BeagleBone Black",                    "BeagleBoard.org"),
+        ("NanoPi R4S", "FriendlyElec"),
-    ("Unknown Board 1.0",                   "Unknown Board"),
+        ("PINE64 RockPro64", "Pine64"),
-    ("SomeSingleWordBoard",                 "SomeSingleWordBoard"),
+        ("BeagleBone Black", "BeagleBoard.org"),
-])
+        ("Unknown Board 1.0", "Unknown Board"),
+        ("SomeSingleWordBoard", "SomeSingleWordBoard"),
+    ],
+)
 def test_arm_vendor_from_model(model, expected):
     assert _arm_vendor_from_model(model) == expected
 
@@ -768,11 +827,27 @@ def test_arm_vendor_from_model(model, expected):
 
 
 def test_get_facts_baremetal_vendor_model_serial(driver):
-    platform = {"vendor": "Dell Inc.", "model": "PowerEdge R720", "serial": "ABC123", "is_vm": False}
+    platform = {
-    with patch.object(driver, "_collect_platform_info", return_value=platform), \
+        "vendor": "Dell Inc.",
-         patch.object(driver, "_parse_uptime", return_value=86400), \
+        "model": "PowerEdge R720",
-         patch.object(driver, "_send", side_effect=["myhost", "myhost.example.com", "Debian GNU/Linux 12", "eth0\neth1",
+        "serial": "ABC123",
-                                                   "6.1.0-18-amd64"]):
+        "is_vm": False,
+    }
+    with (
+        patch.object(driver, "_collect_platform_info", return_value=platform),
+        patch.object(driver, "_parse_uptime", return_value=86400),
+        patch.object(
+            driver,
+            "_send",
+            side_effect=[
+                "myhost",
+                "myhost.example.com",
+                "Debian GNU/Linux 12",
+                "eth0\neth1",
+                "6.1.0-18-amd64",
+            ],
+        ),
+    ):
         facts = driver.get_facts()
     assert facts["vendor"] == "Dell Inc."
     assert facts["model"] == "PowerEdge R720"
@@ -785,13 +860,20 @@ def test_get_facts_baremetal_vendor_model_serial(driver):
 
 def test_get_facts_vm_kvm(driver):
     platform = {
-        "vendor": "KVM", "model": "Virtual Machine",
+        "vendor": "KVM",
-        "serial": "4c4c4544-0000-2010-8020-b4c04f534a31", "is_vm": True,
+        "model": "Virtual Machine",
+        "serial": "4c4c4544-0000-2010-8020-b4c04f534a31",
+        "is_vm": True,
     }
-    with patch.object(driver, "_collect_platform_info", return_value=platform), \
+    with (
-         patch.object(driver, "_parse_uptime", return_value=3600), \
+        patch.object(driver, "_collect_platform_info", return_value=platform),
-         patch.object(driver, "_send", side_effect=["vmhost", "vmhost.local", "Ubuntu 22.04 LTS", "eth0",
+        patch.object(driver, "_parse_uptime", return_value=3600),
-                                                   "5.15.0-91-generic"]):
+        patch.object(
+            driver,
+            "_send",
+            side_effect=["vmhost", "vmhost.local", "Ubuntu 22.04 LTS", "eth0", "5.15.0-91-generic"],
+        ),
+    ):
         facts = driver.get_facts()
     assert facts["vendor"] == "KVM"
     assert facts["model"] == "Virtual Machine"
@@ -800,9 +882,15 @@ def test_get_facts_vm_kvm(driver):
 
 def test_get_facts_fallback_vendor_when_dmi_empty(driver):
     platform = {"vendor": "", "model": "", "serial": "", "is_vm": False}
-    with patch.object(driver, "_collect_platform_info", return_value=platform), \
+    with (
-         patch.object(driver, "_parse_uptime", return_value=0), \
+        patch.object(driver, "_collect_platform_info", return_value=platform),
-         patch.object(driver, "_send", side_effect=["host", "host.local", "Alpine Linux 3.19", "eth0", "6.6.7-0-lts"]):
+        patch.object(driver, "_parse_uptime", return_value=0),
+        patch.object(
+            driver,
+            "_send",
+            side_effect=["host", "host.local", "Alpine Linux 3.19", "eth0", "6.6.7-0-lts"],
+        ),
+    ):
         facts = driver.get_facts()
     assert facts["vendor"] == "Linux"  # fallback to VENDOR class attribute
 
@@ -813,7 +901,12 @@ class TestNoDockerOfItsOwn:
     only the fix that lets the login user use Docker stays."""
 
     def test_the_cli_methods_are_gone(self):
-        for name in ("get_docker_info", "get_docker_outdated", "reconstruct_docker_run", "_docker_bin"):
+        for name in (
+            "get_docker_info",
+            "get_docker_outdated",
+            "reconstruct_docker_run",
+            "_docker_bin",
+        ):
             assert not hasattr(LinuxDriver, name), name
 
     def test_the_engine_access_and_the_permission_fix_stay(self):
@@ -1019,7 +1112,9 @@ class TestReadToTheEnd:
 
     def test_the_echoed_command_does_not_count_as_the_marker(self, driver):
         """Its literal ``$?`` is no number."""
-        channel = _Channel(["sudo true; echo __NETORK_RC=$?\n", "__NETORK_RC=0\nchris@vault-01:~$ "])
+        channel = _Channel(
+            ["sudo true; echo __NETORK_RC=$?\n", "__NETORK_RC=0\nchris@vault-01:~$ "]
+        )
         driver._device = channel
 
         assert _split_status(driver._send(_TRUE_WITH_STATUS))[1] == 0
@@ -1043,7 +1138,7 @@ class TestReadToTheEnd:
     )
     def test_every_status_marker_is_waited_for(self, driver, command):
         marker = re.search(r"echo (__[A-Z_]+=)", command).group(1)
-        channel = _Channel([f"x <a@b>\n", f"{marker}0\nchris@host:~$ "])
+        channel = _Channel(["x <a@b>\n", f"{marker}0\nchris@host:~$ "])
         driver._device = channel
 
         output = driver._send(command)
@@ -1167,7 +1262,11 @@ def _kernel_wire(report: str) -> str:
     import base64
     import gzip
 
-    return "KFACTS_BEGIN\n" + base64.encodebytes(gzip.compress(report.encode())).decode() + "KFACTS_END"
+    return (
+        "KFACTS_BEGIN\n"
+        + base64.encodebytes(gzip.compress(report.encode())).decode()
+        + "KFACTS_END"
+    )
 
 
 def test_get_kernel_facts_carries_the_shared_command_across(driver):
@@ -1369,12 +1468,16 @@ class TestAvailableUpdates:
         driver._pkg_manager = "dnf"
         driver._device.send_command.side_effect = [
             "0",  # id -u
-            ("openssl-libs.x86_64   1:3.1.4-2.fc40   updates\n"
+            (
-            "vim-enhanced.x86_64   2:9.1.083-1.fc40 updates\n__NETORK_RC=100"),
+                "openssl-libs.x86_64   1:3.1.4-2.fc40   updates\n"
+                "vim-enhanced.x86_64   2:9.1.083-1.fc40 updates\n__NETORK_RC=100"
+            ),
             # DNF_SECURITY_COMMAND pipes through cat: the outer status is cat's, dnf's own
             # is in the __DNF_RC marker.
-            ("FEDORA-2024-1a2b3c4d5e Important/Sec. openssl-libs-1:3.1.4-2.fc40.x86_64\n"
+            (
-            "__DNF_RC=0\n__NETORK_RC=0"),
+                "FEDORA-2024-1a2b3c4d5e Important/Sec. openssl-libs-1:3.1.4-2.fc40.x86_64\n"
+                "__DNF_RC=0\n__NETORK_RC=0"
+            ),
         ]
 
         updates = {u["name"]: u for u in driver.get_available_updates()}
@@ -1402,10 +1505,14 @@ class TestAvailableUpdates:
         driver._pkg_manager = "yum"
         driver._device.send_command.side_effect = [
             "0",  # id -u
-            ("openssl-libs.x86_64   1:1.0.2k-26.el7_9   updates\n"
+            (
-            "vim-enhanced.x86_64   2:7.4.629-8.el7_9   updates\n__NETORK_RC=100"),
+                "openssl-libs.x86_64   1:1.0.2k-26.el7_9   updates\n"
-            ("RHSA-2023:3556 Important/Sec. openssl-libs-1:1.0.2k-26.el7_9.x86_64\n"
+                "vim-enhanced.x86_64   2:7.4.629-8.el7_9   updates\n__NETORK_RC=100"
-            "__DNF_RC=0\n__NETORK_RC=0"),
+            ),
+            (
+                "RHSA-2023:3556 Important/Sec. openssl-libs-1:1.0.2k-26.el7_9.x86_64\n"
+                "__DNF_RC=0\n__NETORK_RC=0"
+            ),
         ]
 
         updates = {u["name"]: u for u in driver.get_available_updates()}
@@ -1449,7 +1556,10 @@ class TestAvailableUpdates:
 
     def test_dnf_that_failed_raises(self, driver):
         driver._pkg_manager = "dnf"
-        driver._device.send_command.side_effect = ["0", "Error: Failed to download metadata\n__NETORK_RC=1"]
+        driver._device.send_command.side_effect = [
+            "0",
+            "Error: Failed to download metadata\n__NETORK_RC=1",
+        ]
 
         with pytest.raises(RuntimeError):
             driver.get_available_updates()
@@ -1461,7 +1571,10 @@ class TestRefreshAvailableUpdates:
 
     def test_apt_refreshes_its_index_as_root(self, driver):
         driver._pkg_manager = "apt"
-        driver._device.send_command.side_effect = ["0", "Hit:1 http://archive.ubuntu.com noble InRelease\n__NETORK_RC=0"]
+        driver._device.send_command.side_effect = [
+            "0",
+            "Hit:1 http://archive.ubuntu.com noble InRelease\n__NETORK_RC=0",
+        ]
 
         result = driver.refresh_available_updates()
 
@@ -1470,7 +1583,10 @@ class TestRefreshAvailableUpdates:
 
     def test_without_a_sudo_password_it_never_waits_for_one(self, driver):
         driver._pkg_manager = "apt"
-        driver._device.send_command.side_effect = ["1000", "sudo: a password is required\n__NETORK_RC=1"]
+        driver._device.send_command.side_effect = [
+            "1000",
+            "sudo: a password is required\n__NETORK_RC=1",
+        ]
 
         result = driver.refresh_available_updates()
 

tests/test_ssh_host_key.py

@@ -27,7 +27,9 @@ OTHER_KEY = paramiko.ECDSAKey.generate()
 def _device() -> MagicMock:
     device = MagicMock()
     device.send_command.return_value = "/usr/bin/apt"
-    device.remote_conn_pre.get_transport.return_value.get_remote_server_key.return_value = SERVER_KEY
+    device.remote_conn_pre.get_transport.return_value.get_remote_server_key.return_value = (
+        SERVER_KEY
+    )
     return device
 
 
@@ -76,7 +78,7 @@ def test_a_changed_key_is_refused():
         try:
             raise paramiko.BadHostKeyException("10.0.0.8", SERVER_KEY, OTHER_KEY)
         except paramiko.SSHException as exc:  # what netmiko does with it
-            raise NetmikoTimeoutException(f"A paramiko SSHException occurred: {exc}")
+            raise NetmikoTimeoutException(f"A paramiko SSHException occurred: {exc}") from exc
 
     driver = _driver(seen, SshHostKey.of(OTHER_KEY))
     with patch("napalm_linux.linux.ConnectHandler", side_effect=refuse):

tests/test_sudo_off_the_command_line.py

@@ -21,7 +21,7 @@ from unittest.mock import MagicMock, patch
 import pytest
 
 from napalm_linux import LinuxDriver
-from napalm_linux.linux import _HISTORY_OFF
+from napalm_linux._shell import HISTORY_OFF as _HISTORY_OFF
 
 _PW = "s3cr3t 'q' $x"
 
@@ -30,7 +30,7 @@ class Channel:
     """An exec channel answering with *output* and *status*; it refuses a line
     that holds the password, which is what ``ps`` would show."""
 
-    def __init__(self, host: "Transport"):
+    def __init__(self, host: Transport):
         self.host = host
         self.command = ""
         self.stdin = b""

tests/test_systemd_osc_context.py

@@ -11,7 +11,8 @@ characters and netOrk could not store the poll.
 
 from unittest.mock import MagicMock, patch
 
-from napalm_linux.linux import _HISTORY_OFF, _PROMPT_HOOKS_OFF, LinuxDriver
+from napalm_linux._shell import HISTORY_OFF, PROMPT_HOOKS_OFF
+from napalm_linux.linux import LinuxDriver
 
 #: What ``cat /etc/os-release | grep PRETTY_NAME ...`` returned through netmiko on
 #: an Ubuntu 26.04.1 host (2026-10-23), the prompt line already gone.
@@ -39,13 +40,13 @@ class TestPromptHooksOff:
         _opened(device)
 
         sent = [c.args[0] for c in device.send_command.call_args_list]
-        assert sent[:2] == [_HISTORY_OFF, _PROMPT_HOOKS_OFF]
+        assert sent[:2] == [HISTORY_OFF, PROMPT_HOOKS_OFF]
 
     def test_it_unsets_both_hooks_including_an_array_prompt_command(self):
         # The script appends to PROMPT_COMMAND as an array; assigning the empty
         # string would only clear element 0 and leave systemd's hook running.
-        assert _PROMPT_HOOKS_OFF.startswith(" ")
+        assert PROMPT_HOOKS_OFF.startswith(" ")
-        assert "unset PS0 PROMPT_COMMAND" in _PROMPT_HOOKS_OFF
+        assert "unset PS0 PROMPT_COMMAND" in PROMPT_HOOKS_OFF
 
     def test_the_prompt_is_read_again_once_the_hooks_are_gone(self):
         # netmiko learned the prompt with the sequences in front of it; a prompt
@@ -56,7 +57,7 @@ class TestPromptHooksOff:
         _opened(device)
 
         calls = [(c[0], c.args[0] if c.args else None) for c in device.mock_calls]
-        hooks_off = calls.index(("send_command", _PROMPT_HOOKS_OFF))
+        hooks_off = calls.index(("send_command", PROMPT_HOOKS_OFF))
         assert "set_base_prompt" in [name for name, _ in calls[hooks_off + 1 :]]
 
     def test_a_shell_that_refuses_it_does_not_stop_the_connection(self):