Pacman and apt package operation subcommands

Operation pacman apt (Debian)
List files in a package pacman -Ql <pkg> (installed) / pacman -Fl <pkg> (remote) dpkg -L <pkg> (installed) / apt-file list <pkg> (remote)
Which package owns a path pacman -Qo <file> dpkg -S <file> / apt-file search <file>
Clean cache pacman -Sc (old) / pacman -Scc (all) apt clean (all) / apt autoclean (old)
Search local / remote pacman -Qs <pat> / pacman -Ss <pat> `dpkg -l
Remove + purge config pacman -Rns <pkg> apt purge <pkg>

Notes: pacman's -n skips saving config files; apt needs apt-file (separate package + apt-file update) for uninstalled file queries.