我有一个 Ubuntu 18.LTS，不小心触发了
update-alternatives --config python3.6
这似乎已经破坏了我的系统，因为现在终端、终结器和 apt 似乎都无法正常工作
终结者
Traceback (most recent call last):
File "/usr/bin/terminator", line 23, in <module>
import psutil
ModuleNotFoundError: No module named 'psutil'
终端
Traceback (most recent call last):
File "/usr/bin/gnome-terminal", line 9, in <module>
from gi.repository import GLib, Gio
ModuleNotFoundError: No module named 'gi'
易于
例如尝试添加存储库（仅尝试安装 3.5，因为它似乎是所有这些程序使用的默认版本）
internetmosquito@internetmosquito-PE72-7RD ~ sudo add-apt-repository ppa:deadsnakes/ppa
Traceback (most recent call last):
File "/usr/bin/add-apt-repository", line 12, in <module>
from softwareproperties.SoftwareProperties import SoftwareProperties, shortcut_handler
ModuleNotFoundError: No module named 'softwareproperties'
现在，我必须说我有使用 pyenv 安装的不同版本的 Python：
✘ internetmosquito@internetmosquito-PE72-7RD ~ pyenv versions
system
2.7.13
* 3.8.3 (set by /home/internetmosquito/.pyenv/version)
3.9-dev
其中大部分安装在 /home/internetmosquito/.pyenv/versions
internetmosquito@internetmosquito-PE72-7RD ~ ls -ltra /home/internetmosquito/.pyenv/versions
total 20
drwxr-xr-x 6 internetmosquito internetmosquito 4096 jun 13 2020 3.9-dev
drwxr-xr-x 6 internetmosquito internetmosquito 4096 jun 16 2020 3.8.3
drwxrwxr-x 13 internetmosquito internetmosquito 4096 sep 27 20:35 ..
drwxr-xr-x 6 internetmosquito internetmosquito 4096 feb 9 01:05 2.7.13
drwxr-xr-x 5 internetmosquito internetmosquito 4096 feb 9 02:12 .
现在如果我检查 /usr/bin/python 我会看到以下内容
internetmosquito@internetmosquito-PE72-7RD ~ ls -ltra /usr/bin/python*
lrwxrwxrwx 1 root root 16 mar 13 2020 /usr/bin/python3-config -> python3.8-config
lrwxrwxrwx 1 root root 9 mar 13 2020 /usr/bin/python2 -> python2.7
-rwxr-xr-x 1 root root 388 mar 28 2020 /usr/bin/python3-pasteurize
-rwxr-xr-x 1 root root 384 mar 28 2020 /usr/bin/python3-futurize
-rwxr-xr-x 1 root root 152 abr 9 2020 /usr/bin/python3-pbr
lrwxrwxrwx 1 root root 33 jul 28 2020 /usr/bin/python3.8-config -> x86_64-linux-gnu-python3.8-config
-rwxr-xr-x 1 root root 5486352 jul 28 2020 /usr/bin/python3.8
-rwxr-xr-x 1 root root 3629032 ago 4 2020 /usr/bin/python2.7
lrwxrwxrwx 1 root root 25 feb 8 23:49 /usr/bin/python3 -> /etc/alternatives/python3
lrwxrwxrwx 1 root root 24 feb 9 00:50 /usr/bin/python -> /etc/alternatives/python
似乎我没有 Python 3.5，“我认为”它是终结者所使用的......
internetmosquito@internetmosquito-PE72-7RD ~ cat /usr/bin/terminator
#!/usr/bin/python3
而我的 python3 解析实际上与我的 python 相同......
internetmosquito@internetmosquito-PE72-7RD ~ python
Python 3.8.3 (default, Jun 16 2020, 18:30:59)
[GCC 7.5.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>>
internetmosquito@internetmosquito-PE72-7RD ~ python3
Python 3.8.3 (default, Jun 16 2020, 18:30:59)
[GCC 7.5.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>>
如果我再次尝试更新替代方案，我会收到此消息...
internetmosquito@internetmosquito-PE72-7RD ~ sudo update-alternatives --config python3 There is only one alternative in link group python3 (providing /usr/bin/python3): /usr/local/bin/python3.7 Nothing to configure.
甚至不确定为什么它提到了 python3.7？我确实在 /usr/local/bin 中看到了几个 python
✘ internetmosquito@internetmosquito-PE72-7RD ~ ls -ltra /usr/local/bin/python*
lrwxrwxrwx 1 root root 17 dic 24 2018 /usr/local/bin/python3.7-config -> python3.7m-config
-rwxr-xr-x 2 root root 14925232 dic 24 2018 /usr/local/bin/python3.7m
-rwxr-xr-x 2 root root 14925232 dic 24 2018 /usr/local/bin/python3.7
-rwxr-xr-x 1 root root 3097 dic 24 2018 /usr/local/bin/python3.7m-config
-rwxr-xr-x 2 root root 14642520 feb 9 00:46 /usr/local/bin/python3.5m
-rwxr-xr-x 2 root root 14642520 feb 9 00:46 /usr/local/bin/python3.5
-rwxr-xr-x 1 root root 3071 feb 9 00:46 /usr/local/bin/python3.5m-config
lrwxrwxrwx 1 root root 17 feb 9 00:46 /usr/local/bin/python3.5-config -> python3.5m-config
lrwxrwxrwx 1 root root 9 feb 9 00:46 /usr/local/bin/python3 -> python3.5
lrwxrwxrwx 1 root root 16 feb 9 00:46 /usr/local/bin/python3-config -> python3.5-config
除此之外 lsb_release 也不起作用！
internetmosquito@internetmosquito-PE72-7RD ~ lsb_release -a
Traceback (most recent call last):
File "/usr/bin/lsb_release", line 25, in <module>
import lsb_release
ModuleNotFoundError: No module named 'lsb_release'
甚至不知道还有多少东西坏了……有什么建议可以让系统恢复正常，而不需要重新安装 Ubuntu？我试过了这但没用..与上面描述的问题相同
谢谢！