Add User to Existing Group in Ubuntu

Posted in Quick Tips | 24 comments
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command prompt logousermod is shell command for manipulating user accounts in Ubuntu and almost any other Linux distro. You can use it to add existing user to existing group, for example once installed Virtualbox (sudo apt-get install virtualbox-ose) you should add your user account to vboxusers group to be able to use USB flash drives inside virtual machines.

To add user bob to supplementary group vboxusers use usermod command as follows (-a parameter specifies adding while -G points to group name):

sudo usermod -a -G vboxusers bob

Want to change user’s primary group from default to something else (e.g. group named adm)? No problems:

sudo usermod -g adm bob

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Posted on June 11, 2012 at 9:39 am

Just in case you don’t see it working the way you expect it: you may need to logout and login again to actually be able to use your new powers!


Posted on August 14, 2012 at 8:00 am

"-a parameter specifies" what does this mean? I'm new to ubuntu.


Posted on August 19, 2012 at 8:31 am

-a parameter specifies "adding", read again, or maybe it wasn't written when you read it before.


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You have mentioned in your post about usermod that it is a shell command which is used for manipulating accounts in ubuntu, really informative. Please tell more about adding existing user to existing group?

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