Using "adduser" as alternative for "usermod -aG"

Mastering Ubuntu Server (4th Edition)
1

Hey Jay,

In the first chapter of your book you mentioned both useradd and adduser for creating users.
Later in that chapter you explained adding a user to a group with usermod -aG.

I was wondering if you are aware of the adduser <user> <group> variant of adduser?
According to the documentation (see last paragraph under Description), this command also adds an existing user to an existing group, much identical to usermod -aG.

Perhaps it’s a good idea to mention this variant as well in your next book revision? I personally find the adduser <user> <group> variant a bit more pleasing to use because it prints feedback to the terminal (whereas usermod -aG prints nothing at all) and it’s very easy to execute after adduser <user> by just recalling that command and appending the group.

Let me know your thoughts, were you aware of this approach before?

2

He has covered all in one or more of his videos.

3

Like BigBunny mentioned, both have been well-covered between the book and videos. There are always alternative methods for everything, so it’s really difficult to cover each individual possibility. But for the next revision it’s certainly a possibility.