Mini project: user and group management
For example, imagine that we want to allow every user who is a software developer at our company to read a given file – let’s call it document.txt. We can simply create a developers group and add all of our developer users to that group.
Then, when we’re setting ownership and permissions for document.txt, we can reference the developers group instead of trying to keep track of every single user who might be a member of that group individually.
Creating a user
On a Linux system that has the adduser command installed, you can use it to interactively create a user named dave. If you don’t, the package is usually named useradd (see Chapter 9, Managing Installed Software for more details on installing packages).
Running the command with a username as the only argument will give you a wizard-style user creation process. Notice that we’re using sudo here, since only root can add or delete users:
