apt-get下载慢等;修改下载源

sudo vim /etc/apt/sourcellist

 

 

deb http://mirrors.163.com/ubuntu/ precise main universerestricted multiverse
deb-src http://mirrors.163.com/ubuntu/ precise main universerestricted multiverse
deb http://mirrors.163.com/ubuntu/ precise-security universemain multiverse restricted
deb-src http://mirrors.163.com/ubuntu/ precise-securityuniverse main multiverse restricted
deb http://mirrors.163.com/ubuntu/ precise-updates universemain multiverse restricted
deb http://mirrors.163.com/ubuntu/ precise-proposed universemain multiverse restricted
deb-src http://mirrors.163.com/ubuntu/ precise-proposeduniverse main multiverse restricted
deb http://mirrors.163.com/ubuntu/ precise-backports universemain multiverse restricted
deb-src http://mirrors.163.com/ubuntu/ precise-backportsuniverse main multiverse restricted
deb-src http://mirrors.163.com/ubuntu/ precise-updatesuniverse main multiverse restricted