MacOS who bash
The MacOS who command is a powerful tool that allows users to retrieve detailed information about currently logged-in users on their system. By simply entering “who” in the terminal, users can access a list of logged-in users, including their usernames, terminal device numbers, login times, and the remote host they are connected from. This command provides a quick and efficient way to monitor user activity and manage system resources.
who Syntax:
who [options] [file]Options:
| Option | Description |
|---|---|
| -H | Display column headers |
| -q | Display usernames and count only |
| -m | Display information from utmp file |
| -u | Display idle time and process ID |
| -T | Show time when user logged in last |
| -w | Display user login and idle time |
Parameters:
| Parameter | Description |
|---|---|
| file | Specify a file to display information from |
who Usage:
Display currently logged in users
whoDisplays a list of all users currently logged into the system.
Display currently logged in users with line option
who -lDisplays a list of all users currently logged into the system, along with the terminal line number.
Display currently logged in users with time option
who -TDisplays a list of all users currently logged into the system, along with the time they logged in.
Display currently logged in users with idle time
who -uDisplays a list of all users currently logged into the system, along with their login time and idle time.
How do I use who in MacOS?
To use the who command in MacOS, execute the following command:
whoWhat flag can I use with who to display the hostname of users logged in?
To display the hostname of users logged in, use the following command:
who -mHow can I display the login time and idle time of users using who in MacOS?
You can display the login time and idle time of users by running the command:
who -HHow do I get a more detailed output with who in MacOS, including the PID and terminal of each user?
For a more detailed output with the PID and terminal of each user, use the command:
who -uHow can I see only the users who are actively logged in and using a terminal in MacOS with who?
To see only the users who are actively logged in and using a terminal, use the command:
who -qIs there a way to display the system boot time and run level with the who command in MacOS?
Yes, you can display the system boot time and run level by executing:
who -bHow can I get a continuously updated list of all users logged in with who in MacOS?
To continuously update and display a list of all users logged in, use the following command:
who -aApplications of the who command
- Display information about currently logged in users
- Show the username, terminal, login time, and IP address of users
- Check for remote connections to the system
- Verify if someone else is using the system
- Track user activity on the system