apt sources.list在升级到12.04时被禁用
在执行释放升级之后，我现在正在运行ubuntu 12.04 LTS，如下所示
> lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 12.04 LTS Release: 12.04 Codename: precise 但是，我发现我的/etc/apt/sources.list中的所有条目都被注释掉了，除了一个。
问题：我可以安全地编辑这些内容，用下面显示的“精确”替换旧的“清晰”吗？
## unixteam source list # deb http://debian.yorku.ca/ubuntu/ precise main main/debian-installer restricted restricted/debian-installer # disabled on upgrade to precise # deb-src http://debian.yorku.ca/ubuntu/ precise main restricted # disabled on upgrade to precise # deb http://debian.yorku.ca/ubuntu/ lucid-updates main restricted # disabled on upgrade to precise # deb-src http://debian.yorku.ca/ubuntu/ lucid-updates main restricted # disabled on upgrade to precise # deb http://debian.yorku.ca/ubuntu/ precise universe # disabled on upgrade to precise # deb-src http://debian.yorku.ca/ubuntu/ precise universe # disabled on upgrade to precise # deb http://debian.yorku.ca/ubuntu/ precise multiverse # disabled on upgrade to precise # deb-src http://debian.yorku.ca/ubuntu/ precise multiverse # disabled on upgrade to precise # deb http://debian.yorku.ca/ubuntu lucid-security main restricted # disabled on upgrade to precise # deb-src http://debian.yorku.ca/ubuntu lucid-security main restricted # disabled on upgrade to precise # deb http://debian.yorku.ca/ubuntu lucid-security universe # disabled on upgrade to precise # deb-src http://debian.yorku.ca/ubuntu lucid-security universe # disabled on upgrade to precise # deb http://debian.yorku.ca/ubuntu lucid-security multiverse # disabled on upgrade to precise # deb-src http://debian.yorku.ca/ubuntu lucid-security multiverse # disabled on upgrade to precise # R sources # see http://cran.us.r-project.org/bin/linux/ubuntu/ for details # deb http://probability.ca/cran/bin/linux/ubuntu lucid/ # disabled on upgrade to precise deb http://archive.ubuntu.com/ubuntu precise main multiverse universe
安装Y PPA Manager配合，它非常直观： http ： //www.webupd8.org/2012/10/y-ppa-manager-0092-released-with-new.html
检查Sources是否真的支持precise我检查了这个源[ http://debian.yorku.ca/ubuntu/dists/ ]并且有一个precise文件夹，所以将源重命名为precise应该可以正常工作。 虽然在标记为lucid-security来源上，您可能希望将其更改为precise-security 。