id MacOS command
The id command on MacOS is used to display user and group information. It shows the current user’s user and group IDs, as well as any supplementary group IDs. This command is useful for checking the user and group memberships of the current user, which can be important for understanding file and directory permissions. Additionally, the id command allows you to specify a username to display the user and group information for a different user. This can be helpful when troubleshooting permissions or access issues on a MacOS system. By using the -G option, you can display only the group IDs associated with the user. The -g option displays only the primary group ID, while the -n option displays the group names instead of the numerical IDs.
id Syntax:
Section titled “id Syntax:”id [username]Options:
Section titled “Options:”| Option | Description |
|---|---|
| -G | Display the group IDs |
| -g | Display the effective group |
| -P | Don’t traverse the hierarchy |
| -u | Display only the user ID |
Parameters:
Section titled “Parameters:”| Parameter | Description |
|---|---|
| username | Specify the username to display specific user information |
id Command Examples:
Section titled “id Command Examples:”Check current user’s group memberships
Section titled “Check current user’s group memberships”idDisplays the user ID, group ID, and group memberships for the current user.
Display group memberships for a specific user
Section titled “Display group memberships for a specific user”id usernameShows the user ID, group ID, and group memberships for the specified username.
Display only the user ID
Section titled “Display only the user ID”id -uDisplays only the user ID of the current user.
Display only the group ID
Section titled “Display only the group ID”id -gShows only the group ID of the current user.
Display detailed information about a specific user
Section titled “Display detailed information about a specific user”id -u usernameDisplays detailed information about the specified user, including their user ID, group ID, and group memberships.
Display supplementary group IDs
Section titled “Display supplementary group IDs”id -GShows the supplementary group IDs (in addition to the primary group ID) for the current user.
id Command Help Center:
Section titled “id Command Help Center:”How do I use id in MacOS?
Section titled “How do I use id in MacOS?”To use the id command in MacOS, execute the following command:
idHow to display the user and group ID using id in MacOS?
Section titled “How to display the user and group ID using id in MacOS?”To display the user and group ID, use the following command:
id -u -gHow to get detailed user information with id in MacOS?
Section titled “How to get detailed user information with id in MacOS?”To get detailed user information, run the command below:
id -u -n -r -GHow can I see all group memberships with id in MacOS?
Section titled “How can I see all group memberships with id in MacOS?”To view all group memberships, use the id command with the following syntax:
id -GnHow to show only the user ID using id in MacOS?
Section titled “How to show only the user ID using id in MacOS?”To show only the user ID, use the command:
id -uHow to display only the primary group ID using id in MacOS?
Section titled “How to display only the primary group ID using id in MacOS?”You can display only the primary group ID by executing the command:
id -gHow do I show a specific user’s information with id in MacOS?
Section titled “How do I show a specific user’s information with id in MacOS?”To display information for a specific user, run the command below, replacing “username” with the actual username:
id usernameHow to check if a user is a member of a specific group with id in MacOS?
Section titled “How to check if a user is a member of a specific group with id in MacOS?”To check if a user is a member of a specific group, use the following command:
id -nG usernameApplications of the id command
Section titled “Applications of the id command”- Check the user and group ID of a specific user
- Determine the groups a user belongs to
- Verify a user’s permissions and access levels for specific files and directories