1.sudo gedit /etc/apt/sources.list
编辑你的源列表,将原来的内容全部删除,添加下面列表中最适合你的源(注意不要全部添加),选择一个最合适你的即可,复制到你的列表中,然后保存列表。
2.sudo apt-get update 更新源列表信息
可以在运行“sudo apt-get update”时查看一下错误信息,把不能连接的源删除再重新运行“sudo apt-get update ”。
3.sudo apt-get upgrade 升级或者用ubuntu自带的更新管理器升级也可。
成都市 电子科技大学更新服务器(教育网,推荐校园网和网通用户使用):
debhttp://ubuntu.uestc.edu.cn/ubuntu/lucid main multiverse restricted universe
debhttp://ubuntu.uestc.edu.cn/ubuntu/lucid-backports main multiverse restricted universe
debhttp://ubuntu.uestc.edu.cn/ubuntu/lucid-proposed main multiverse restricted universe
debhttp://ubuntu.uestc.edu.cn/ubuntu/lucid-security main multiverse restricted universe
debhttp://ubuntu.uestc.edu.cn/ubuntu/lucid-updates main multiverse restricted universe
deb-srchttp://ubuntu.uestc.edu.cn/ubuntu/lucid main multiverse restricted universe
deb-srchttp://ubuntu.uestc.edu.cn/ubuntu/lucid-backports main multiverse restricted universe
deb-srchttp://ubuntu.uestc.edu.cn/ubuntu/lucid-proposed main multiverse restricted universe
deb-srchttp://ubuntu.uestc.edu.cn/ubuntu/lucid-security main multiverse restricted universe
deb-srchttp://ubuntu.uestc.edu.cn/ubuntu/lucid-updates main multiverse restricted universe
网易163更新服务器:
debhttp://mirrors.163.com/ubuntu/lucid main restricted universe multiverse
debhttp://mirrors.163.com/ubuntu/lucid-security main restricted universe multiverse
debhttp://mirrors.163.com/ubuntu/lucid-updates main restricted universe multiverse
debhttp://mirrors.163.com/ubuntu/lucid-proposed main restricted universe multiverse
debhttp://mirrors.163.com/ubuntu/lucid-backports main restricted universe multiverse
deb-srchttp://mirrors.163.com/ubuntu/lucid main restricted universe multiverse
deb-srchttp://mirrors.163.com/ubuntu/lucid-security main restricted universe multiverse
deb-srchttp://mirrors.163.com/ubuntu/lucid-updates main restricted universe multiverse
deb-srchttp://mirrors.163.com/ubuntu/lucid-proposed main restricted universe multiverse
deb-srchttp://mirrors.163.com/ubuntu/lucid-backports main restricted universe multiverse