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UNIX for Dummies Questions & Answers
strange doubt in users
Post 91697 by matrixmadhan on Monday 5th of December 2005 01:51:48 AM
12-05-2005
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LEARN ABOUT LINUX
newgrp
NEWGRP(1) User Commands NEWGRP(1) NAME
newgrp - log in to a new group SYNOPSIS
newgrp [-] [group] DESCRIPTION
The newgrp command is used to change the current group ID during a login session. If the optional - flag is given, the user's environment will be reinitialized as though the user had logged in, otherwise the current environment, including current working directory, remains unchanged. newgrp changes the current real group ID to the named group, or to the default group listed in /etc/passwd if no group name is given. newgrp also tries to add the group to the user groupset. If not root, the user will be prompted for a password if she does not have a password (in /etc/shadow if this user has an entry in the shadowed password file, or in /etc/passwd otherwise) and the group does, or if the user is not listed as a member and the group has a password. The user will be denied access if the group password is empty and the user is not listed as a member. If there is an entry for this group in /etc/gshadow, then the list of members and the password of this group will be taken from this file, otherwise, the entry in /etc/group is considered. CONFIGURATION
The following configuration variables in /etc/login.defs change the behavior of this tool: SYSLOG_SG_ENAB (boolean) Enable "syslog" logging of sg activity. FILES
/etc/passwd User account information. /etc/shadow Secure user account information. /etc/group Group account information. /etc/gshadow Secure group account information. SEE ALSO
id(1), login(1), su(1), sg(1), gpasswd(1), group(5), gshadow(5). User Commands 06/24/2011 NEWGRP(1)