如果不慎修改了source.list内容,导致一系列错误,建议恢复默认源文件。
sudo gedit /etc/apt/sources.list
然后把下面默认源内容复制进去
ubuntu20.LTS系统默认源sources.list文件内容
#deb cdrom:[Ubuntu 20.04 LTS _Focal Fossa_ - Release amd64 (20200423)]/ focal main restricted
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# new
2021-09-26 12:48:36
35KB
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c
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