VIPW(8) — UNIX Programmer’s Manual
NAME
vipw − edit the password file with vi
SYNOPSIS
vipw
DESCRIPTION
Vipw edits the password file while setting the appropriate locks, and does any necessary processing after the password file is unlocked. If the password file is already being edited, then you will be told to try again later
SEE ALSO
chfn(1), chsh(1), passwd(1), passwd(5), adduser(8)
FILES
/etc/vipw.lock
BUGS
Vipw does not remove the vipw.lock file; this is not a bug, but people tend to think it is.
No one deals with left-over /etc/ptmp (the real lock) files after a system crash.
4th Berkeley Distribution — @(#)vipw.81.1PreliminaryGER0