I was under the impression that whenever you run apt-get update it reads the repositories listed in /etc/apt/sources.list file and fetches the contents of it but apparently something else is going on too...
So somtime back I added the following line in my /etc/apt/sources.list: # Opera Browser Repository deb http://deb.opera.com/opera/ stable non-free and then installed opera browser from it: apt-get update; apt-get install opera Now after sometime I removed the opera repository line from sources.list (but the package is still installed) and then when I ran apt-get update, I still saw apt-get trying to read the opera repository like this: debian:/var/lib/apt# apt-get update Hit http://security.debian.org stable/updates Release.gpg Ign http://security.debian.org stable/updates/main Translation-en_US Hit http://mirrors.kernel.org stable Release.gpg Ign http://mirrors.kernel.org stable/main Translation-en_US Hit http://security.debian.org stable/updates Release Hit http://mirrors.kernel.org stable Release Ign http://security.debian.org stable/updates/main Packages/DiffIndex Hit http://deb.opera.com stable Release.gpg Ign http://deb.opera.com stable/non-free Translation-en_US Hit http://security.debian.org stable/updates/main Packages Ign http://mirrors.kernel.org stable/main Packages/DiffIndex Hit http://mirrors.kernel.org stable/main Packages Hit http://deb.opera.com stable Release Ign http://deb.opera.com stable/non-free Packages/DiffIndex Ign http://deb.opera.com stable/non-free Packages Hit http://deb.opera.com stable/non-free Packages Reading package lists... Done debian:/var/lib/apt# Here is my sources.list file that I used to ran the above apt-get update command: #Stable deb http://mirrors.kernel.org/debian stable main #deb-src http://mirrors.kernel.org/debian stable main #Testing #deb http://mirrors.kernel.org/debian testing main #deb-src http://mirrors.kernel.org/debian testing main #Unstable #deb http://mirrors.kernel.org/debian unstable main #deb-src http://mirrors.kernel.org/debian unstable main #For Security patches deb http://security.debian.org/ stable/updates main #Debian Backports #deb http://www.backports.org/debian/ lenny-backports main And here is the output of the package lists of the repositories: debian:~# ls /var/lib/apt/lists/ deb.opera.com_opera_dists_stable_non-free_binary-i386_Packages deb.opera.com_opera_dists_stable_Release deb.opera.com_opera_dists_stable_Release.gpg lock mirrors.kernel.org_debian_dists_stable_main_binary-i386_Packages mirrors.kernel.org_debian_dists_stable_Release mirrors.kernel.org_debian_dists_stable_Release.gpg partial security.debian.org_dists_stable_updates_main_binary-i386_Packages security.debian.org_dists_stable_updates_Release security.debian.org_dists_stable_updates_Release.gpg debian:~# Not sure what is happening and from where apt-get is still seeing the opera repo line. I have always use apt-get. Thanks
