solaris - pwck (1)

     pwck, grpck - password/group file checkers

     /usr/sbin/pwck [ filename ]
     /usr/sbin/grpck [ filename ]

     SUNWcsu

     pwck scans the password file and notes any  inconsistencies.
     The checks include validation of the number of fields, login
     name, user ID, group ID, and whether the login directory and
     the  program-to-use-as-shell  exist.   The  default password
     file is /etc/passwd.

     grpck verifies all entries in the group file. This verifica-
     tion  includes  a check of the number of fields, group name,
     group ID, whether  any  login  names  belong  to  more  than
     NGROUPS_MAX  groups  and  that all login names appear in the
     password file. The default group file is /etc/group.

     /etc/group
     /etc/passwd

     getpwent(3C), group(4), passwd(4)

     Group entries in /etc/group with no login names are flagged.

     Group file 'filename' is empty
          The /etc/passwd or /etc/group file is an empty file.

     cannot open file filename: No such file or directory
          The /etc/passwd or /etc/group file does not exist.

     If no filename argument is given,  grpck  checks  the  local
     group  file,  /etc/group, and also makes sure that all login
     names encountered in the checked group file are known to the
     system  getpwent(3C)  routine.   This  means  that the login
     names may be supplied by a network name service.