在terminal中键入sudo gedit /etc/apt/sources.list，修改sources.list内容为下面4个源其中之一

保存后sudo apt-get update

deb http://ftp.heanet.ie/mirrors/ubuntu/ karmic main multiverse restricted universe

deb http://ftp.heanet.ie/mirrors/ubuntu/ karmic-backports main multiverse restricted universe

deb http://ftp.heanet.ie/mirrors/ubuntu/ karmic-proposed main multiverse restricted universe

deb http://ftp.heanet.ie/mirrors/ubuntu/ karmic-security main multiverse restricted universe

deb http://ftp.heanet.ie/mirrors/ubuntu/ karmic-updates main multiverse restricted universe

deb-src http://ftp.heanet.ie/mirrors/ubuntu/ karmic main multiverse restricted universe

deb-src http://ftp.heanet.ie/mirrors/ubuntu/ karmic-backports main multiverse restricted universe

deb-src http://ftp.heanet.ie/mirrors/ubuntu/ karmic-proposed main multiverse restricted universe

deb-src http://ftp.heanet.ie/mirrors/ubuntu/ karmic-security main multiverse restricted universe

deb-src http://ftp.heanet.ie/mirrors/ubuntu/ karmic-updates main multiverse restricted universe

More >>

时隔数月，重回wordpress的怀抱。

域名和空间都搬到了国外，踏实了。