Troubleshooting Linux Servers

“You thought you had it all working, didn’t you? But then your
users report slowdowns, or your logfiles are empty, or jobs don’t
run– so how do you find out what’s going on?

“You thought you had it all working, didn’t you? And then you
find out that your process you thought was running and collecting
data hasn’t reported anything for two hours. Or maybe it’s
something on the desktop — your browser has frozen and isn’t
responding. Or suddenly everything’s gotten really slow and you’re
not sure why. And this happens every few days, and you’re tired of
it.

“How do you find out what’s going on in your running
processes?

“top and other basic system tools

“All the techniques discussed here require a process ID. If you
know the name of the process that’s stuck or running wild, you can
get its PID with ps aux | grep processname. Otherwise, you can
usually find high-CPU processes with top:”

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