由於 Ubuntu Mate 上的腳本掛鉤，apt 更新失敗

我在我的 Raspberry Pi 3 ( aarch64) 上執行 Ubuntu Mate。我認為這個問題通常是 Debian 特有的，而不是 RPi3 特有的。

我安裝了 python3 和 pipapt install python3-pip並成功執行了一個腳本。

然而，一天后，Python 停止工作，抱怨：

No module named "threading"
...

我在做等時遇到了同樣的apt update錯誤apt install。

目前我機器上的 Python 狀態中斷了apt，我不知道如何解決這個問題。我試圖刪除破壞 apt 功能的文件，但我認為事情變得更糟了。

現在，一個簡單的apt update顯示：

$ sudo apt -oDebug::RunScripts=true update
Hit:1 http://ports.ubuntu.com/ubuntu-ports focal InRelease
Get:2 http://ports.ubuntu.com/ubuntu-ports focal-security InRelease [107 kB]
Hit:3 http://ppa.launchpad.net/ubuntu-pi-flavour-makers/ppa/ubuntu focal InRelease
Get:4 http://ports.ubuntu.com/ubuntu-ports focal-updates InRelease [111 kB]
Get:5 http://ports.ubuntu.com/ubuntu-ports focal-updates/main arm64 Packages [303 kB]
Get:6 http://ports.ubuntu.com/ubuntu-ports focal-updates/universe arm64 Packages [159 kB]
Fetched 680 kB in 5s (135 kB/s)                          
Running external script: '[ ! -f /var/run/dbus/system_bus_socket ] || /usr/bin/dbus-send --system --dest=org.debian.apt --type=signal /org/debian/apt org.debian.apt.CacheChanged || true'
Running external script: '/usr/bin/test -e /usr/share/dbus-1/system-services/org.freedesktop.PackageKit.service && /usr/bin/test -S /var/run/dbus/system_bus_socket && /usr/bin/gdbus call --system --dest org.freedesktop.PackageKit --object-path /org/freedesktop/PackageKit --timeout 4 --method org.freedesktop.PackageKit.StateHasChanged cache-update > /dev/null; /bin/echo > /dev/null'
Running external script: 'if /usr/bin/test -w /var/lib/command-not-found/ -a -e /usr/lib/cnf-update-db; then /usr/lib/cnf-update-db > /dev/null; fi'
Could not find platform independent libraries <prefix>
Could not find platform dependent libraries <exec_prefix>
Consider setting $PYTHONHOME to <prefix>[:<exec_prefix>]
Python path configuration:
 PYTHONHOME = (not set)
 PYTHONPATH = (not set)
 program name = '/usr/bin/python3'
 isolated = 0
 environment = 1
 user site = 1
 import site = 1
 sys._base_executable = '/usr/bin/python3'
 sys.base_prefix = '/usr'
 sys.base_exec_prefix = '/usr'
 sys.executable = '/usr/bin/python3'
 sys.prefix = '/usr'
 sys.exec_prefix = '/usr'
 sys.path = [
   '/usr/lib/python38.zip',
   '/usr/lib/python3.8',
   '/usr/lib/lib-dynload',
 ]
Fatal Python error: init_fs_encoding: failed to get the Python codec of the filesystem encoding
Python runtime state: core initialized
ModuleNotFoundError: No module named 'encodings'

Current thread 0x0000ffff9547b010 (most recent call first):
<no Python frame>
Reading package lists... Done
E: Problem executing scripts APT::Update::Post-Invoke-Success 'if /usr/bin/test -w /var/lib/command-not-found/ -a -e /usr/lib/cnf-update-db; then /usr/lib/cnf-update-db > /dev/null; fi'
E: Sub-process returned an error code

如何在不重新安裝整個系統的情況下修復它？

E: Problem executing scripts APT::Update::Post-Invoke-Success 'if /usr/bin/test -w /var/lib/command-not-found/ -a -e /usr/lib/cnf-update-db; then /usr/lib/cnf-update-db > /dev/null; fi'

指向罪魁禍首：/usr/lib/cnf-update-db. 禁用它應該可以讓你apt update走得更遠：

sudo mv /etc/apt/apt.conf.d/50command-not-found{,.disabled}

請記住在一切都修復後重新啟用它：

sudo mv /etc/apt/apt.conf.d/50command-not-found{.disabled,}

引用自：https://unix.stackexchange.com/questions/607305