/snap/core20/current/lib/tmpfiles.d/ Current File: //snap/core20/current/lib/tmpfiles.d/passwd.conf

# If a password operation is in progress and we lose power, stale lockfiles
# can be left behind.  Clear them on boot.
r! /etc/gshadow.lock
r! /etc/shadow.lock
r! /etc/passwd.lock
r! /etc/group.lock
r! /etc/subuid.lock
r! /etc/subgid.lock