Fix: E: Command line option --installed is not understood in combination with the other options

Error:
# apt-get list --installed

E: Command line option --installed is not understood in combination with the other options

Fix:

If you are trying to get a list of all installed packages in Linux using apt-get command, and you get the above error, then you need to make use of the apt command instead.

apt list --installed
apt get list installed packages example

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