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MAN page from RedHat 6.X shadow-utils-980403-12.i386.rpm

GRPCK

Section: User Commands (1)
Index 

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 tosee that the entry has the proper format and valid data in each field.The user is prompted to delete entries that are improperly formatted orwhich 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 todelete 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 theremaining checks will still be made.All other errors are warnings and the user is encouraged to run thegroupmod command to correct the error.The commands which operate on the /etc/group file are not able toalter corrupted or duplicated entries.grpck should be used in those circumstances to remove the offendingentry. 

OPTIONS

By default, grpck operates on the files /etc/group and/etc/gshadow.The user may select alternate files with the group and shadowparameters.Additionally, the user may execute the command in read-only mode byspecifying the -r flag.This causes all questions regarding changes to be answered nowithout 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 (jfhAATTtab.com)


 

Index

NAME
SYNOPSIS
DESCRIPTION
OPTIONS
FILES
SEE ALSO
DIAGNOSTICS
AUTHOR

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