Lets Play with Netstat
Hello Readers !! Today I am here with few commands that you can use in your Ubuntu System to know about Network Related information. The command I can simply say netstat: http://linux.die.net/man/8/netstat Man - page you surely going to need for reference. Just open a terminal with CTRL+ALT+T (If Ubuntu) and then changed to root user with either sudo -i or su -root Then start now!! How many ports you have in your System ? # netstat -a 2. How may ports are listening now ? # netstat -l 3. What is the routing of your network ? # netstat -r 4. If a program/service access some port number , what is it ? # netstat -ap | grep ftp Hope that helps. For more information use that man-page.