在 sudo apt-get install git 之后：
无法安装某些软件包。这可能意味着您请求了一个不可能的情况，或者如果您使用的是不稳定的发行版，则某些必需的软件包尚未创建或已从 Incoming 中移出。
以下信息可能有助于解决该情况：
The following packages have unmet dependencies:
git : Depends: liberror-perl but it is not installable
E: Unable to correct problems, you have held broken packages.
后sudo apt-get install liberror-perl：
Package liberror-perl is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package 'liberror-perl' has no installation candidate
答案1
尝试
sudo apt-get update
sudo apt-get upgrade
sudo apt-get install -f
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