Traceback (most recent call last):
File "/usr/lib/cnf-update-db", line 8, in
from CommandNotFound.db.creator import DbCreator
ModuleNotFoundError: No module named 'CommandNotFound'
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'
vi /usr/lib/cnf-update-db 将#!/usr/bin/python3 替换成#!/usr/bin/python3.6
