Complex Command Lines

Let's find how many SSH sessions to the local machine exist.

Find our own IP address:

  $  ifconfig eth0 | head -2
  eth0      Link encap:Ethernet  HWaddr 00:10:F3:02:15:00  
            inet addr:192.168.1.200  Bcast:192.168.1.255

  $ ifconfig -a | grep 'inet addr'| head -1  \
       | awk -F: '{print $2}' | awk '{print $1}'
  192.168.1.200

  $ myip=`ifconfig -a | grep 'inet addr'| head -1 |
       awk -F: '{print $2}' | awk '{print $1}' `