System is gets very slow
My box is connected to a big network and every now and then I feel my system becomes very slow and sometimes non-responsive at all. It takes > 5 min to come back to normal and sometimes I have to restart my system to make it work properly.
My questions are:
1- Is this normal in Ubuntu?
2- How do I know if there are some processes running in the background? I tried htop but I could see nothing abnormal!
3- How do I know if there is a network scan?
4- Is there a "quick" way to know if someone is logged into my system without my authorisation?
Thanks in advance,
Last edited by d0.higgs; September 24th, 2011 at 10:36 PM.
Reason: adding more info
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