addstr - Linux
Overview
addstr
is a utility command used to add new users to the system. It provides a simple interface for creating new user accounts, setting their initial properties, and assigning them to groups.
Syntax
addstr [options] <username> [options]
Options/Flags
-h, --help
: Display usage information.-g, --group
: Assign the user to a specific group. This option can be used multiple times to assign the user to multiple groups.-H, --home
: Set the user’s home directory.-s, --shell
: Set the user’s default login shell.-c, --comment
: Set a comment or description for the user.-d, --create-home
: Create the user’s home directory if it doesn’t exist.-p, --password
: Set the user’s password.-m, --move-home
: Move files from a temporary directory to the user’s home directory.
Examples
Creating a new user with default settings
addstr username
Creating a user with a custom home directory and shell
addstr -H /home/custom/username -s /bin/zsh username
Creating a user and assigning them to a group
addstr -g users username
Common Issues
- Error: User already exists. The specified username already exists in the system. Choose a different username.
- Error: Invalid group name. The group specified with the
-g
option does not exist. Verify the group name. - Error: Home directory not found. The home directory specified with the
-H
option does not exist. Create the directory before running the command.
Integration
addstr
can be integrated with other Linux commands and tools to automate user management tasks. For example, you can use addstr
within a script to create multiple users with custom settings.
Related Commands
useradd
: Adds a new system user.usermod
: Modifies existing user account properties.userdel
: Deletes a system user.