13,420
edits
Changes
no edit summary
'''Answer the Part 4 observations / questions in your lab log book.'''
=INVESTIGATION 2: Managing System Services and Run-Levels and System Serviceslevels=
Many students may think that the following topic is small and "not a big deal". Those students may say, '''"How hard is running and stopping services?"'''
<li>Use the command <b><code><span style="color:#3366CC;font-size:1.2em;">service iptables stop</span></code></b> to stop the service named '''iptables'''</li>
<li>Run a command to verify that the '''iptables''' service has stopped.</li>
<li>A newer method of managing services is by using '''systemd'''. It has the ability to manage dependent service in parallel and allow one service to be stopped without disrupting the other services. Here is a link that briefly explains how to use '''systemd ''' (as opposed to tradition method: ''init'') and the '''systemctl ''' command: [http://zenit.senecac.on.ca/wiki/index.php/Init_vs_systemd init vs systemd]</li>
<li>If you reboot now - the iptables service will be turned back on. We don't want it on though, it causes students headaches. To turn it off permanently we need to use the '''chkconfig''' command:<br><b><code><span style="color:#3366CC;font-size:1.2em;">chkconfig iptables off</span></code></b></li>
<li>Use the '''systemctl''' command (from the link above - showing examples) to verify that the '''iptables''' service is off ('''hint:''' issue command, and pipe to grep "'''iptables'''").