Table of Contents
Introduction
who command Displays a list of users who are currently logged into the computer? The who command in Linux is used to display information about users who are currently logged in to the system. It provides details such as username, terminal, login time, and remote host. Here are some examples of using the who command:
Linux offers a robust set of tools for managing and monitoring user sessions and system activity. Among these, the who command stands out as a simple yet powerful utility. Whether you’re a system administrator checking logged-in users or a developer troubleshooting access issues, understanding the who command is essential. This guide dives deep into the who command, explaining its functionality, use cases, and examples to empower Linux users of all levels.
What Is the who Command in Linux?
The who command provides details about users currently logged into the system. By running this command, you can obtain valuable insights such as:
- Usernames of logged-in users
- Terminal session details
- Login times
- Hostnames or IP addresses
Its simplicity and efficiency make it a staple tool for Linux professionals.
How to Use the who Command in Linux
Basic Syntax
The syntax for the who command is straightforward:
On the man page, the describes it
- who – show who is logged on.
man who – More details information.
who command in Linux with Examples?
$ whoShow only the username and login time:
who -u
Include the idle time of logged-in users:
who -u -iShow the IP addresses of remote hosts:
who -aShow the process ID associated with each login session:
who -pFrequently Asked Questions (FAQ)
What is the difference between who and w?
- The
whocommand shows currently logged-in users, while thewcommand provides additional details about what each user is doing.
Can I use the who command on macOS?
Yes, the who command works on macOS as it is a Unix-based system, though some options may vary.
How does who differ from users?
The users command lists usernames of logged-in users in a single line without additional details.
Conclusion
who command is the simple command in
These are some common examples of using the who command. There are additional options available, which can be explored by referring to the command’s manual page using man who or by checking the command’s help using who --help. Thank you for reading the DevopsRoles page!
