Ubuntu 11.04已经发布了，Ubuntu 11.04 正式版搭载全新用户界面、具有里程碑意义的新版 Ubuntu 11.04 现已正式发布，此版本的开发代号为 Natty Narwhal 。新版的 Ubuntu 11.04 不再提供上网本版本，现在只区分为 Ubuntu Desktop 和 Ubuntu Server 两种版本。 下面是Ubuntu 11.04一些常见的源
deb http://cn.archive.Ubuntu.com/ubuntu/ natty multiverse Ubuntu 11.04台湾源 deb http://tw.archive.Ubuntu.com/ubuntu/ natty main universe restricted multiverse SRT Sources deb http://Ubuntu.srt.cn/ubuntu/ natty main restricted universe multiverse Ubuntu 11.04网易源（速度很快） deb http://mirrors.163.com/Ubuntu/ natty main universe restricted multiverse Ubuntu 11.04 上海源 提供 Kernel，Hiweed，ubuntu deb http://mirror.rootguide.org/Ubuntu/ natty main universe restricted multiverse Ubuntu 11.04 搜狐源 deb http://mirrors.shlug.org/Ubuntu/ natty main universe restricted multiverse Ubuntu 11.04 骨头源 骨头源是bones7456架设的一个Ubuntu源 ，提供ubuntu,deepin deb http://Ubuntu.srt.cn/ubuntu/ natty main universe restricted multiverse lupaworld 源，提供 ArchLinux，Everest，FreeBSD，Fedora，LFS，Magiclinux，Mandriva，OpenOffice，openSUSE，Puppy，Red Hat，Slitaz，Turbolinux，Ubuntu，中标普华 deb http://mirror.lupaworld.com/Ubuntu/ natty main universe restricted multiverse rootguide源，Ubuntu官方上海源，提供 Kernel，Hiweed，ubuntu deb http://mirror.rootguide.org/Ubuntu/ natty main universe restricted multiverse 网易开源镜像站,提供FreeBSD，OpenBSD，archlinux，centos，cygwin，debian，Fedora，gentoo，kernel，openSUSE，slackware，Ubuntu deb http://mirrors.163.com/Ubuntu/ natty main universe restricted multiverse 搜狐开源镜像站，提供 CPAN，FreeBSD，NetBSD，OpenBSD，apache，archlinux，centos，cygwin，dag，debian，Fedora，gentoo，kernel，lfs，mysql，nginx，openSUSE，PHP，rpmfusion，slackware，Ubuntu deb http://mirrors.shlug.org/Ubuntu/ natty main universe restricted multiverse 然后执行： sudo apt-get update sudo update-manager -c -d升级就可以了。
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://archive.canonical.com/Ubuntu natty partner
deb-src http://archive.canonical.com/Ubuntu natty partner
deb-src http://tw.archive.Ubuntu.com/ubuntu/ natty main universe restricted multiverse
deb http://tw.archive.Ubuntu.com/ubuntu/ natty-security universe main multiverse restricted
deb-src http://tw.archive.Ubuntu.com/ubuntu/ natty-security universe main multiverse restricted
deb http://tw.archive.Ubuntu.com/ubuntu/ natty-updates universe main multiverse restricted
deb-src http://tw.archive.Ubuntu.com/ubuntu/ natty-updates universe main multiverse restricted
deb http://Ubuntu.srt.cn/ubuntu/ natty-security main restricted universe multiverse
deb http://Ubuntu.srt.cn/ubuntu/ natty-updates main restricted universe multiverse
deb http://Ubuntu.srt.cn/ubuntu/ natty-proposed main restricted universe multiverse
deb http://Ubuntu.srt.cn/ubuntu/ natty-backports main restricted universe multiverse
deb-src http://Ubuntu.srt.cn/ubuntu/ natty main restricted universe multiverse
deb-src http://Ubuntu.srt.cn/ubuntu/ natty-security main restricted universe multiverse
deb-src http://Ubuntu.srt.cn/ubuntu/ natty-updates main restricted universe multiverse
deb-src http://Ubuntu.srt.cn/ubuntu/ natty-proposed main restricted universe multiverse
deb-src http://Ubuntu.srt.cn/ubuntu/ natty-backports main restricted universe multiverse
deb-src http://mirrors.163.com/Ubuntu/ natty main universe restricted multiverse
deb http://mirrors.163.com/Ubuntu/ natty-security universe main multiverse restricted
deb-src http://mirrors.163.com/Ubuntu/ natty-security universe main multiverse restricted
deb http://mirrors.163.com/Ubuntu/ natty-updates universe main multiverse restricted
deb http://mirrors.163.com/Ubuntu/ natty-proposed universe main multiverse restricted
deb-src http://mirrors.163.com/Ubuntu/ natty-proposed universe main multiverse restricted
deb http://mirrors.163.com/Ubuntu/ natty-backports universe main multiverse restricted
deb-src http://mirrors.163.com/Ubuntu/ natty-backports universe main multiverse restricted
deb-src http://mirrors.163.com/Ubuntu/ natty-updates universe main multiverse restricted
deb-src http://mirror.rootguide.org/Ubuntu/ natty main universe restricted multiverse
deb http://mirror.rootguide.org/Ubuntu/ natty-security universe main multiverse restricted
deb-src http://mirror.rootguide.org/Ubuntu/ natty-security universe main multiverse restricted
deb http://mirror.rootguide.org/Ubuntu/ natty-updates universe main multiverse restricted
deb http://mirror.rootguide.org/Ubuntu/ natty-proposed universe main multiverse restricted
deb-src http://mirror.rootguide.org/Ubuntu/ natty-proposed universe main multiverse restricted
deb http://mirror.rootguide.org/Ubuntu/ natty-backports universe main multiverse restricted
deb-src http://mirror.rootguide.org/Ubuntu/ natty-backports universe main multiverse restricted
deb-src http://mirror.rootguide.org/Ubuntu/ natty-updates universe main multiverse restricted
deb-src http://mirrors.shlug.org/Ubuntu/ natty main universe restricted multiverse
deb http://mirrors.shlug.org/Ubuntu/ natty-security universe main multiverse restricted
deb-src http://mirrors.shlug.org/Ubuntu/ natty-security universe main multiverse restricted
deb http://mirrors.shlug.org/Ubuntu/ natty-updates universe main multiverse restricted
deb http://mirrors.shlug.org/Ubuntu/ natty-proposed universe main multiverse restricted
deb-src http://mirrors.shlug.org/Ubuntu/ natty-proposed universe main multiverse restricted
deb http://mirrors.shlug.org/Ubuntu/ natty-backports universe main multiverse restricted
deb-src http://mirrors.shlug.org/Ubuntu/ natty-backports universe main multiverse restricted
deb-src http://mirrors.shlug.org/Ubuntu/ natty-updates universe main multiverse restricted
deb-src http://Ubuntu.srt.cn/ubuntu/ natty main universe restricted multiverse
deb http://Ubuntu.srt.cn/ubuntu/ natty-security universe main multiverse restricted
deb-src http://Ubuntu.srt.cn/ubuntu/ natty-security universe main multiverse restricted
deb http://Ubuntu.srt.cn/ubuntu/ natty-updates universe main multiverse restricted
deb http://Ubuntu.srt.cn/ubuntu/ natty-proposed universe main multiverse restricted
deb-src http://Ubuntu.srt.cn/ubuntu/ natty-proposed universe main multiverse restricted
deb http://Ubuntu.srt.cn/ubuntu/ natty-backports universe main multiverse restricted
deb-src http://Ubuntu.srt.cn/ubuntu/ natty-backports universe main multiverse restricted
deb-src http://Ubuntu.srt.cn/ubuntu/ natty-updates universe main multiverse restricted
deb-src http://mirror.lupaworld.com/Ubuntu/ natty main universe restricted multiverse
deb http://mirror.lupaworld.com/Ubuntu/ natty-security universe main multiverse restricted
deb-src http://mirror.lupaworld.com/Ubuntu/ natty-security universe main multiverse restricted
deb http://mirror.lupaworld.com/Ubuntu/ natty-updates universe main multiverse restricted
deb http://mirror.lupaworld.com/Ubuntu/ natty-proposed universe main multiverse restricted
deb-src http://mirror.lupaworld.com/Ubuntu/ natty-proposed universe main multiverse restricted
deb http://mirror.lupaworld.com/Ubuntu/ natty-backports universe main multiverse restricted
deb-src http://mirror.lupaworld.com/Ubuntu/ natty-backports universe main multiverse restricted
deb-src http://mirror.lupaworld.com/Ubuntu/ natty-updates universe main multiverse restricted
deb-src http://mirror.rootguide.org/Ubuntu/ natty main universe restricted multiverse
deb http://mirror.rootguide.org/Ubuntu/ natty-security universe main multiverse restricted
deb-src http://mirror.rootguide.org/Ubuntu/ natty-security universe main multiverse restricted
deb http://mirror.rootguide.org/Ubuntu/ natty-updates universe main multiverse restricted
deb http://mirror.rootguide.org/Ubuntu/ natty-proposed universe main multiverse restricted
deb-src http://mirror.rootguide.org/Ubuntu/ natty-proposed universe main multiverse restricted
deb http://mirror.rootguide.org/Ubuntu/ natty-backports universe main multiverse restricted
deb-src http://mirror.rootguide.org/Ubuntu/ natty-backports universe main multiverse restricted
deb-src http://mirror.rootguide.org/Ubuntu/ natty-updates universe main multiverse restricted
deb-src http://mirrors.163.com/Ubuntu/ natty main universe restricted multiverse
deb http://mirrors.163.com/Ubuntu/ natty-security universe main multiverse restricted
deb-src http://mirrors.163.com/Ubuntu/ natty-security universe main multiverse restricted
deb http://mirrors.163.com/Ubuntu/ natty-updates universe main multiverse restricted
deb http://mirrors.163.com/Ubuntu/ natty-proposed universe main multiverse restricted
deb-src http://mirrors.163.com/Ubuntu/ natty-proposed universe main multiverse restricted
deb http://mirrors.163.com/Ubuntu/ natty-backports universe main multiverse restricted
deb-src http://mirrors.163.com/Ubuntu/ natty-backports universe main multiverse restricted
deb-src http://mirrors.163.com/Ubuntu/ natty-updates universe main multiverse restricted
deb-src http://mirrors.shlug.org/Ubuntu/ natty main universe restricted multiverse
deb http://mirrors.shlug.org/Ubuntu/ natty-security universe main multiverse restricted
deb-src http://mirrors.shlug.org/Ubuntu/ natty-security universe main multiverse restricted
deb http://mirrors.shlug.org/Ubuntu/ natty-updates universe main multiverse restricted
deb http://mirrors.shlug.org/Ubuntu/ natty-proposed universe main multiverse restricted
deb-src http://mirrors.shlug.org/Ubuntu/ natty-proposed universe main multiverse restricted
deb http://mirrors.shlug.org/Ubuntu/ natty-backports universe main multiverse restricted
deb-src http://mirrors.shlug.org/Ubuntu/ natty-backports universe main multiverse restricted
deb-src http://mirrors.shlug.org/Ubuntu/ natty-updates universe main multiverse restricted
