更新和包安装不可能: E:无法找到包！Linux 17.3

Question

我有个问题。

安装软件包或更新系统是不可能的。

终端和软件管理器都没有工作(软件管理器没有启动)。

终端显示命令如下：

sudo apt-get update
E: Type 'non-free' is not known on line 3 in source list /etc/apt/sources.list
E: The list of sources could not be read.

当我试图安装一个程序时：

sudo apt-get install exfat-utils exfat-fuse
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Package exfat-utils 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 'exfat-utils' has no installation candidate
E: Unable to locate package exfat-fuse

sudo apt-get update && sudo apt-get install autokey-gtk
E: Type 'non-free' is not known on line 3 in source list /etc/apt/sources.list
E: The list of sources could not be read.


sudo apt-get install autokey-gtk
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package autokey-gtk

我的源列表文件的内容如下：

#deb cdrom:[Linux Mint 17.3 _Rosa_ - Release amd64 20151128]/ trusty contrib 

main non-free

deb http://xnv4.xandros.com/xs2.0/upkg-srv2 etch main contrib
      non-free

deb http://xnv4.xandros.com/xs2.0/upkg-srv2 etch main contrib
      non-free

此问题发生在我以前的Linux (17.0)上，并在安装LM 17.3后几周后再次出现。

非常感谢你的帮助，我很感激！

Answer 1

您的sources.list格式不正确。‘’non free‘不应该出现在单独的行上。这就是你看到的原因：

E: Type 'non-free' is not known on line 3 in source list /etc/apt/sources.list

sources.list应该如下所示：

#deb cdrom:[Linux Mint 17.3 _Rosa_ - Release amd64 20151128]/ trusty main contrib non-free

deb http://xnv4.xandros.com/xs2.0/upkg-srv2 etch main contrib non-free

deb http://xnv4.xandros.com/xs2.0/upkg-srv2 etch main contrib non-free

还请注意，您的第一行被注释掉了，因此实际上只有两行，这两行都不像Mint的标准源代码。您可能想要添加更多的源。还请考虑是否要保留xnv4.xandros.com源。