ubuntu右上の赤い三角警告
:ubuntu , The update information is outdated。
:
“ (system settings)”->“ (Software&Updates)”->“ (Other Software)” , :
1、sudo rm -rf /var/lib/apt/lists ( lists )
2、sudo mkdir /var/lib/apt/lists ( lists )
3、sudo apt-get update ( )
:http://www.cnblogs.com/xuxiang/archive/2013/06/14/3136917.html