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:
Section titled “who Syntax:”who [options] [file]Options:
Section titled “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:
Section titled “Parameters:”| Parameter | Description |
|---|---|
| file | Specify a file to display information from |
who Usage:
Section titled “who Usage:”Display currently logged in users
Section titled “Display currently logged in users”whoDisplays a list of all users currently logged into the system.
Display currently logged in users with line option
Section titled “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
Section titled “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
Section titled “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?
Section titled “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?
Section titled “What 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?
Section titled “How 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?
Section titled “How 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?
Section titled “How 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?
Section titled “Is 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?
Section titled “How 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
Section titled “Applications 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