I have seen it before. I am just wondering what exactly does it do?
-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.
21A 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. Aug 24, 2011 at 4:04
4In the occasional situation where
sudo apt-get -f installis not, by itself, sufficient to fix broken packages, see this answer. Sep 13, 2012 at 16:22
Just as an addition - if you change your mind about the
packagethat resulted in the unmet dependencies, then simply do
sudo apt-get remove packageto get rid of the unmet dependency error and not install the packages that fix the break.– user373531Oct 10, 2016 at 12:53
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.