I'm having trouble adding a user to a group:

# useradd -aG group user
# useradd -a -G group user
# useradd -G group user --append

It tells me that the -a option is an invalid or unrecognized.

Can someone help me add the user to a second group (and not make him belong to it as the primary group)?

Using Fedora 36. Thanks.


1 Answer 1


The useradd command is for adding a new user account. The usermod command is for modifying an existing user account - for example by adding it to a group

usermod -aG group user

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