How to add user in a group?
 

Hi,
I have four users in my red hat linux 9. I want that all these four users should add in a group i.e "Marketing".please guide me that using terminal which command may i write so that the users should added in the group.

Note:- I does't want to use GUI interface to do it.

thanks in advance,
garden

Try this:

Substitute john bill mary and jane for your real user names.

thanks for the prompt reply. Well the command works fine. Now a question rises that how can I see all four users in "Marketing " Group. Is there anyway command to check it ?

Use this command:

You may want to use
to make sure you only get exact matches of "Marketing", especially if you want to use it in a script.

-- Dan

thanks a lot all of you for guiding me. Well about users and groups in linux and the files related to it, kindly refer me any site in which I may study it in more detail.

Again thanks
garden

well the command

#cat /etc/group| grep Martketing

and

egrep '^Marketing:' /etc/group

provide same output.So what is the difference in both these and in which situation I may use egrep or cat command.

Iam sure there should be a minor difference.

Man pages will tell you.

Basically grep and egrep is same command, look into the man page for more information.
#man grep

The significance isn't the type of grep used; it's the usage of regexp that is more explicit.

Your example would match more than "Marketing" (e.g. "Marketing2"), that could cause problems when used in scripts.

Nothing like allowing the OP to answer his/her own question, eh? Your answer isn't quite right either.

from the man page:

LOL. I forgot how these discussions can take off. Quite refreshing.

Yes, you're right. Let's get it entirely right:

If you're really using red hat linux 9 (codename Shrike) http://en.wikipedia.org/wiki/Red_Hat_Linux, it hasn't been updated, inc security in years. Do yourself (& us ) a favour an get something current eg http://en.wikipedia.org/wiki/CentOS

I'm sure if he were writing a script he wouldn't be asking for help on adding users to a explicit group... My mind tells me he would know that (or google) already.