Basic Linux commands

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Basic Linux commands are explained so you can know your way around the box.

uptime - shows you how long the server has been active and server load at the current moment, as well as the average load during the longer period.

[root@test ~]# uptime
 01:40:36 up 3 days,  1:46,  1 user,  load average: 0.08, 0.02, 0.01

who - will give you list of users and their hostnames who are logged in on the server

[root@test ~]# who
root     pts/0        2011-04-18 01:40 (test.oxxus.net)

w - is basically a combination of who, uptime and current process user is running

[root@test ~]# w
 01:42:49 up 3 days,  1:48,  1 user,  load average: 0.01, 0.00, 0.00
USER     TTY      FROM              LOGIN@   IDLE   JCPU   PCPU WHAT
root     pts/0    test.oxxus.net 01:40    0.00s  0.02s  0.00s w