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GRPCK
!!!GRPCK
NAME
SYNOPSIS
DESCRIPTION
OPTIONS
FILES
SEE ALSO
DIAGNOSTICS
AUTHOR
----
!!NAME


grpck - verify integrity of group files
!!SYNOPSIS


__grpck__ [[__-r__] [[''group shadow'']
!!DESCRIPTION


__grpck__ verifies the integrity of the system
authentication information. All entries in the
''/etc/group'' and ''/etc/gshadow'' are checked to see
that the entry has the proper format and valid data in each
field. The user is prompted to delete entries that are
improperly formatted or which have other incorrectable
errors.


Checks are made to verify that each entry has


- the correct number of fields
- a unique group name
- a valid list of members and administrators


The checks for correct number of fields and unique group
name are fatal. If the entry has the wrong number of fields,
the user will be prompted to delete the entire line. If the
user does not answer affirmatively, all further checks are
bypassed. An entry with a duplicated group name is prompted
for deletion, but the remaining checks will still be made.
All other errors are warnings and the user is encouraged to
run the __groupmod__ command to correct the
error.


The commands which operate on the ''/etc/group'' file are
not able to alter corrupted or duplicated entries.
__grpck__ should be used in those circumstances to remove
the offending entry.
!!OPTIONS


By default, __grpck__ operates on the files
''/etc/group'' and ''/etc/gshadow''. The user may
select alternate files with the ''group'' and
''shadow'' parameters. Additionally, the user may execute
the command in read-only mode by specifying the __-r__
flag. This causes all questions regarding changes to be
answered __no__ without user intervention.
!!FILES


/etc/group - group account information
/etc/gshadow - encrypted passwords and group administrator
information
/etc/passwd - user information
!!SEE ALSO


groupmod(8), group(5), passwd(5),
shadow(5)
!!DIAGNOSTICS


The __grpck__ command exits with the following
values:


0


Success


1


Syntax Error


2


One or more bad group entries


3


Cannot open group files


4


Cannot lock group files


5


Cannot update group files
!!AUTHOR


Julianne Frances Haugh (jfh@austin.ibm.com)
----

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Last edited on Tuesday, June 4, 2002 12:31:12 am by "perry"

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