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→Part 1: How do we Manage System Services?: - typo
At the beginning of this lab we mentioned that running unneeded '''packages can be a security risk''' due to the unnecessary increase in the complexity of your system. Similarly, it is also unnecessarily hazardous, and even more so, to leave unneeded services running. In this investigation, we will learn how to '''control services, and turn off those services that we think are not necessary to help reduce security risks'''.
Although there is a command called: '''service''' that may appear to manager manage services on your Linux system, it is considered <u>'''deprecated'''</u> (i.e. "obsolete"). It has been replaced by using the [http://zenit.senecac.on.ca/wiki/index.php/Init_vs_systemd#systemd_Command_Usage systemctl] command.
:'''Perform the following steps:'''
# Use the commands you used in Lab2 to '''stop''' and '''disable''' the iptables service.
# Issue a command to verify you '''disabled''' and '''stopped''' the iptables service.<br><br>'''Note:''' There is a major difference between stopping a service and disabling a service: If a service is stopped but enabled, the service will start upon reboot. Therefore to prevent it being started upon boot-up, the service will need to be disabled as well!<br><br>
# Issue the commands to '''start''' and '''enable''' the iptables service, and '''verify''' that it is <u>started</u> and <u>enabled</u>.<br><br>'''Note:''' If you performed the commands correctly, the iptables service should be running, and will automatically run upon your Linux machine start-up.
===Part 2: How do we Manage Runlevels?===