gpasswd:tldr:8e488

The command "gpasswd -a ${user} ${group}" is used to add a user to a specific group using the gpasswd command in Linux or Unix-based operating systems.

Here's what each part of the command means:

• gpasswd: It is a command-line utility used to administer the /etc/group file and group passwords.
• -a: It is an option that stands for "add." It is used to add a user to a group.
• ${user}: It is a placeholder representing the username of the user you want to add to a group. You should replace ${user} with the actual username.
• ${group}: It is a placeholder representing the group name you want to add the user to. You should replace ${group} with the actual group name.

For example, if you want to add the user "john" to the group "developers," you would run the command: gpasswd -a john developers. This will add the user "john" to the "developers" group.