What does "sudo apt install -f" command do in Ubuntu? [duplicate]

I'm very new in the Linux world and I have found a guide to install Skype.

This are the commands to install Skype:

wget
sudo dpkg -i skypeforlinux-64.deb
sudo apt install -f

I don't understand why should I use the last command "sudo apt install -f". What does this command do? I see that skype is installed even I don't use this command.

Thanks in advance!

1

1 Answer

sudo apt install -f 'to fix broken dependencies'

The command line

sudo apt install -f

attempts to fix problems with broken dependencies between program packages.

This is explained in man apt-get, while the man page of the new version apt is not complete.

 -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 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.

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