5: Get to know the command-line tools
Let’s face it: If you’re running Linux, there might be an instance where you will need to restart your network
and you won’t have access to the GUI. In this particular case, knowing that /etc/rc.d/network restart will do
the trick will solve your problem. Of course, that’s not the only networking command-line tool. You’ll also want
to know tools like dhclient, traceroute, samba, ping, and netstat.