$ sudo pacman -S linux-zen
error: failed to init transaction (unable to lock database)
error: could not lock database: File exists.
if you're sure a package manager is not already.
running, you can remove /var/lib/pacman/db.lck.
$ sudo pacman -Syu
:: Synchronizing package databases...
error: failed to update core (unable to lock database)
error: failed to update extra (unable to lock database)
error: failed to update community (unable to lock database)
error: failed to update archlinuxfr (unable to lock database)
error: failed to update multilib (unable to lock database)
error: failed to synchronize all databases.
$ sudo pacman -S vim
error: failed to init transaction (unable to lock database)
error: could not lock database: File exists.
if you're sure a package manager is not already.
running, you can remove /var/lib/pacman/db.lck.