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Possible Duplicate:
How to know what user belongs to what ip on debian

Is there a way to see a list of all current logged in user on a Debian server? Sometimes it is very useful to do so, e.g. before updating certain plugins etc.

Any software or built-in features? All users will log in through ssh.

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cherrun
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  • what do you mean with Debain Apache server? Do you want to know the system users or users which are currently visiting a website? – reox Feb 15 '12 at 10:25
  • I'm sorry that was a bit inaccurate. I mean a debian server, and users who are logged into that server. Edited post. – cherrun Feb 15 '12 at 10:44
  • [Sounds familiar](http://serverfault.com/questions/302026/how-to-know-what-user-belongs-to-what-ip-on-debian). – jscott Feb 15 '12 at 11:06

2 Answers2

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use the who command. It will show you the username and the terminal/pseudo terminal that they are using, as well as what time they logged in:

    migs     pts/0        2012-02-15 17:46 (:0)
    migs     pts/1        2012-02-15 17:46 (:0)
    migs     pts/2        2012-02-15 17:48 (:0)

Mine shows three instances of me because I've got two terminal windows open, plus my log-in to the box.

You could also use the last command. This will show the most recently logged in people, as well as currently logged in users.

    migs     pts/2        :0               Wed Feb 15 17:48   still logged in   
    migs     pts/1        :0               Wed Feb 15 17:46   still logged in   
    migs     pts/0        :0               Wed Feb 15 17:46   still logged in
Ouki
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Migs
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  • Nice! Didn't know such commands existed. Does the 'last' command have a limit or will it print out all users who have ever logged in? – cherrun Feb 15 '12 at 10:39
  • it will display all log-ins from up to the date the /var/log/wtmp file got rotated. You can check the other wtmp files in /var/log with the -f switch. – Migs Feb 15 '12 at 10:45
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The who command will do the job and show all users logged in.

Ouki
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Truebsalgeblaese
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