Here are a few helpful commands that will allow you to keep track of user login status of your Linux system. The first two commands are pretty straight forward: whoami and logname
These two commands show that I'm currently working as sziegenbusch. At first glance there doesn't seem to be much difference between these two commands, however, when I switch user to kingtux I can see the difference.
I run whoami and learn that I'm current using the kingtux account, however, when I run the logname command I see that I'm sziegenbusch.
Another helpful command you can use to display who is logged in and related data (e.g., processes, boot time) is who
You can use the who command with the -a and -H options to see all available information and column headers:
The w command also displays who is logged on and the processes. You can read more information about the w command at The w command.
The id command will show you a lot of information regarding your current user or an arbitrary user:
Other helpful commands for monitoring log in information are: lastlog, last -F, and lastb.
