Because Ubuntu has a mix of utilities to manage packages I constantly seem to be forgetting the options I need when I go to do basic package management. Mostly for my sake are the ones I use most regularly:
List installed packages:
dpkg -l dpkg --get-selections
List names of available packages (including those not installed):
apt-cache pkgnames
Tell what package owns what file:
apt-file search FILE dsearch -s FILE
List files in a given package:
dpkg --listfiles PACKAGE dpkg-query -L PACKAGE
Force a package reinstall:
apt --reinstall install PACKAGE
Show general package information:
apt-cache show PACKAGE dpkg --print-avail PACKAGE
Show package dependency information:
apt-cache showpkg PACKAGE
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