Remove a secondary group from user (Linux) Post: 302950947

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Top Forums UNIX for Dummies Questions & Answers Remove a secondary group from user (Linux) Post 302950947 by John K on Thursday 30th of July 2015 10:24:59 AM

07-30-2015

Registered User

Thanks Ravinder,
Using -a option in usermod, you can easily add the user to another group.In my below example, I added john to asmoper group using -a option as shown below

Code:

# useradd -u 28 -g oinstall -G asmadmin,asmdba john
#
# id -a john
uid=28(john) gid=2000(oinstall) groups=2000(oinstall),2100(asmadmin),2300(asmdba)
#
#
#
# usermod -a -G asmoper john
#
# id -a john
uid=28(john) gid=2000(oinstall) groups=2000(oinstall),2100(asmadmin),2300(asmdba),2301(asmoper)

I was hoping for a similair short command to remove just one group from a user. Using your method,I need to list all the groups I want to keep. It could be confusing if the user belongs to several groups

For eg: If I want to remove secondary group asmadmin from john user, I need to list asmoper,asmdba groups which I want to keep after -G

Code:

# id -a john
uid=28(john) gid=2000(oinstall) groups=2000(oinstall),2100(asmadmin),2300(asmdba),2301(asmoper)
#

# usermod -G asmoper,asmdba john
#
# id -a john
uid=28(john) gid=2000(oinstall) groups=2000(oinstall),2300(asmdba),2301(asmoper)

Last edited by John K; 07-30-2015 at 11:32 AM..

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LEARN ABOUT DEBIAN

ldapgid

ldapgid(1)						      General Commands Manual							ldapgid(1)

NAME

       ldapgid - displays a group's list of IDs the way ldapid(1) does.

SYNOPSIS

       ldapgid [-P]<groupname|gid>

DESCRIPTION

       The  following  is displayed : gid=gidNumber(cn) users(primary)=uidNumber(uid)[,uidNumber(uid)...] users(secondary)=uidNumber(uid)[,uidNum-
       ber(uid)...].

       users(primary) lists users having the group declared as their primary group. users(secondary) lists users using the group  as  a  secondary
       one.

OPTIONS

       <groupname | gid>
	      Group name or GID of a group to show information about.

       [-P]   Display group information as a /etc/group file entry.

SEE ALSO

       ldapid(1), lsldap(1), ldapfinger(1), ldapscripts(5).

AVAILABILITY

       The ldapscripts are provided under the GNU General Public License v2 (see COPYING for more details).  The latest version of the ldapscripts
       is available on : http://contribs.martymac.org

BUGS

       No bug known.

								 January 23, 2009							ldapgid(1)

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