This command will tell the last login and reboot related information

last
This command will reveal login has been made to the system as well as when the reboot occurs. It uses a file called /var/log/wtmp,which captures all the information about the successful login and reboot information. It has many switch ,by which you can get an idea when people login how long they stay.
Sample Output
reboot   system boot  2.6.30-latest    Mon Aug 24 17:51          (00:59)
bhaskar  pts/5                         Mon Aug 24 11:43 - 11:52  (00:09)
bhaskar  pts/5                         Mon Aug 24 11:09 - 11:09  (00:00)
bhaskar  pts/4                         Mon Aug 24 10:12 - 12:35  (02:23)
bhaskar  pts/3                         Mon Aug 24 08:48 - 13:53  (05:05)
bhaskar  pts/1                         Mon Aug 24 08:48 - 13:53  (05:05)
bhaskar  :0           console          Mon Aug 24 08:47 - 13:54  (05:06)
bhaskar  :0                            Mon Aug 24 08:47 - 08:47  (00:00)

-3
2009-08-29 12:08:30

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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