mario@mario-700Z3A-700Z4A-700Z5A-700Z5B:~$ lsb_release -a
No LSB modules are available.
Distributor ID:	LinuxMint
Description:	Linux Mint 17.1 Rebecca
Release:	17.1
Codename:	rebecca
mario@mario-700Z3A-700Z4A-700Z5A-700Z5B:~$ cat /etc/apt/sources.list
#deb cdrom:[Linux Mint 17 _Qiana_ - Release amd64 20140624]/ trusty contrib main non-free

mario@mario-700Z3A-700Z4A-700Z5A-700Z5B:~$ ls /etc/apt/sources.list.d/
getdeb.list			      webupd8team-popcorntime-trusty.list
mozillateam-firefox-next-trusty.list  webupd8team-unstable-trusty.list
official-package-repositories.list    webupd8team-y-ppa-manager-trusty.list
pipelight-stable-trusty.list
mario@mario-700Z3A-700Z4A-700Z5A-700Z5B:~$