Howto: Linux creating user account under group

by on August 25, 2006 · 4 comments· LAST UPDATED August 29, 2006

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Q. How do I add a new user called foo under existing group bar?

A. You need to use useradd command, which create a new user or update default new user information. You need to pass -g option to useradd command. It specifies the group name or number of the user’s initial login group. The group name must exist. A group number must refer to an already existing group. The default group number is 1 or whatever is specified in /etc/default/useradd file.

Task: Make sure group sales exists

# grep 'sales' /etc/group

Task: Add a new user tom to group sales

# useradd -g sales tom
# passwd tom

You can add existing user jerry to group sales with usermod command:
# usermod -g sales jerry

You can add existing user jerry to secondary group purchase with usermod command:
# usermod -G purchase jerry

Please note that above commands works with Solaris UNIX, FreeBSD and UNIX like oses.

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{ 4 comments… read them below or add one }

1 Eagle March 31, 2008 at 8:47 am

Hi,
How can i add an user who has root permissions.

Regards
Eagle

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2 paramjeet singh October 26, 2009 at 1:36 pm

can i add an user who has root permission if yes then, how is it.
PARAMJEET SINGH

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3 sreeram January 6, 2010 at 12:22 pm

i installed oracle 10g on linux 5.4 but running time i am getting this problem
Xlib: connection to “:0.0″ refused by server Xlib: No protocol specified

Reply

4 sreeram January 6, 2010 at 12:26 pm

i installed oracle 10g on linux 5.4 but running time i am getting this problem
Xlib: connection to “:0.0″ refused by server Xlib: No protocol specified

Reply

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