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# Linux adduser Command [ Linux Command Manual](#) The Linux `adduser` command is used to add a new user account or update default user information. The `adduser` and `useradd` commands are the same command (via a symbolic link). Permission required: System administrator. `adduser` is for adding users. Conversely, there is a command to delete users: (#), with the syntax `userdel `. ### Syntax `adduser [-G group[,...]] [-m | -M] [-u uid ] loginid` or `adduser -D ` **Parameter Description**: * `-c comment` Comment information for the new user in the password file (usually `/etc/passwd`). * `-d home_dir` Sets the user's home directory to `home_dir`. The default value is the default home directory plus the user's login ID. * `-e expire_date` Sets the expiration date for this account (format: YYYY-MM-DD). The default value is permanent validity. * `-f inactive_time` Example: ### Examples Add a regular user `# adduser kk //Add user kk` Specify the corresponding user group for the added user `# adduser -g root kk //Add user kk and specify the user's group as the root group` Create a system user `# adduser -r kk //Create a system user kk` Specify the /home directory for the newly added user `# adduser -d /home/myf kk //Add new user kk, with home directory /home/myf//When the user kk logs in, the system enters the default directory /home/myf` [ Linux Command Manual](#)