6. 安装系统更新
打开“系统->系统管理->更新管理器”，安装更新。完成后若系统提示重新启动，请重新启动系统。
如果你是校园网用户，请查看：Ubuntu11.04教育网源
下面是Ubuntu 11.04一些常见的源
#Ubuntu官方源
deb http://cn.archive.Ubuntu.com/ubuntu/ natty multiverse
deb-src http://cn.archive.Ubuntu.com/ubuntu/ natty multiverse
deb http://cn.archive.Ubuntu.com/ubuntu/ natty-updates multiverse
deb-src http://cn.archive.Ubuntu.com/ubuntu/ natty-updates multiverse
deb http://security.Ubuntu.com/ubuntu natty-security main restricted
deb-src http://security.Ubuntu.com/ubuntu natty-security main restricted
deb http://security.Ubuntu.com/ubuntu natty-security universe
deb-src http://security.Ubuntu.com/ubuntu natty-security universe
deb http://security.Ubuntu.com/ubuntu natty-security multiverse
deb-src http://security.Ubuntu.com/ubuntu natty-security multiverse
deb http://archi
