utility edits the password file after setting the appropriate locks,
and does any necessary processing after the password file is unlocked.
If the password file is already locked for editing by another user,
will ask you
to try again later.
The default editor for
When run without options,
will work with the password files in
option may be used to specify an alternative
to work with.
utility performs a number of consistency checks on the password entries,
and will not allow a password file with a
entry to be
rejects the new password file, the user is prompted to re-enter
the edit session.
Once the information has been verified,
to update the user database.
This is run in the background, and,
at very large sites could take several minutes.
Until this update
is completed, the password file is unavailable for other updates
and the new information is not available to programs.