41

I have seen it before. I am just wondering what exactly does it do?

39

From man apt-get:

   -f, --fix-broken
       Fix; attempt to correct a system with broken dependencies in place. This
       option, when used with install/remove, can omit any packages to permit APT
       to deduce a likely solution. If packages are specified, these have to
       completely correct the problem. The option is sometimes necessary when
       running APT for the first time; APT itself does not allow broken package
       dependencies to exist on a system. It is possible that a system's dependency
       structure can be so corrupt as to require manual intervention (which usually
       means using dselect(1) or dpkg --remove to eliminate some of the offending
       packages). Use of this option together with -m may produce an error in some
       situations. Configuration Item: APT::Get::Fix-Broken.
  • 19
    A you can thank the lord for it. When you have a broken package its like having a rock inside your shoe... and you are in a marathon... with bears riding sharks riding huge spiders. But thanks to this broken stuff gets fixed. – Luis Alvarado Aug 24 '11 at 4:04
  • 2
    In the occasional situation where sudo apt-get -f install is not, by itself, sufficient to fix broken packages, see this answer. – Eliah Kagan Sep 13 '12 at 16:22
  • Just as an addition - if you change your mind about the package that resulted in the unmet dependencies, then simply do sudo apt-get remove package to get rid of the unmet dependency error and not install the packages that fix the break. – user1953384 Oct 10 '16 at 12:53
1

Here's where I found it very useful. I ran a dpkg command to install a couple of .deb packages, but the install failed because some dependencies were missing.

I then ran

apt-get -f install

and it installed exactly the dependencies that were needed. I was then able to re-run my dpkg command and everything worked.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.