[ Thanks to An Anonymous Reader for
this link. ]
In any Linux distribution, some services are enabled to start at
boot up by default. For example, on my machine, I have pcmcia, cron
daemon, postfix mail transport agent… just to name a few, which
start during boot up. Usually, it is prudent to disable all
services that are not needed as they are potential security risks
and also they unnecessarily waste hardware resources. For example,
my machine does not have any pcmcia cards so I can safely disable
it. Same is the case with postfix which is also not used…”