I've noticed sometimes when I do apt-get Debian asks me to insert [the installation cd I used] (6.0.6 amd64 dvd1). Sometimes it doesn't, although maybe it's because I've already mounted it earlier; I can't notice a definite pattern. Why is this? Does this happen with other flavors too? And I've searched for stuff like "virtualbox apt-get installation cd" with no luck (can't find a good query).

  • 7
    If you don't want for apt to search for the CD, comment it in /etc/apt/sources.list
    – schaiba
    Jan 27, 2013 at 21:37
  • Ah course... seems so obvious in hindsight, but just learning linux and repositories and stuff. Thanks! If you answer, I'll mark it right after I double check with a package
    – Raekye
    Jan 27, 2013 at 21:47
  • 1
    Can you also remove the references to Virtualbox? Pretty sure it's just a Debian thing, having nothing to do with that... Jan 27, 2013 at 22:01

1 Answer 1


A local CD can act as an APT repo, just as if it were a distant server.

If you don't want apt-get to search the CD, comment out the relevant line in /etc/apt/sources.list which looks something like this:

deb cdrom:[deb95amd64d1]/ stretch contrib main

To comment out the line, simply prefix it with a hash/pound symbol #.

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