An unresolvable problem occurred while initialising the package information.
Please report this bug for the 'update-manager' package and try to include the following error message:
'E:Malformed line 57 in source list /etc/apt/sources.list (dist parse)'
答案1
数到/etc/apt/sources.list文件的第 57 行，然后将其从文件中删除。
为了修改该文件，请记住您需要使用以下命令以 root 身份打开它：
gksudo gedit /etc/apt/sources.list
将此文件恢复正常后，运行：
sudo apt-get update