donkarlo@mohammad-desktop:~$ cat /etc/apt/sources.list
deb http://ir.archive.ubuntu.com/ubuntu/ trusty main universe restricted multiverse
deb-src http://ir.archive.ubuntu.com/ubuntu/ trusty main universe restricted multiverse

deb http://security.ubuntu.com/ubuntu trusty-security main universe restricted multiverse
deb-src http://security.ubuntu.com/ubuntu trusty-security main universe restricted multiverse

deb http://ir.archive.ubuntu.com/ubuntu/ trusty-updates main universe restricted multiverse
deb-src http://ir.archive.ubuntu.com/ubuntu/ trusty-updates main universe restricted multiverse