Memory Management

hhegab · 08-07-2002, 05:49 PM

I some time feel that I have plenty of packages working in the background, how may I know them? and How may I stop them then?

Also, how may I know what is going on mn my box at any time?
I use redhat 7.2

hhegab

Thymox · 08-07-2002, 06:03 PM

There are two pretty common ways of finding out/killing what 'processes' are running on your machine.

1) Type ps -aux - this lists all the processes running (you may want to type ps -aux | less instead... there's likely to be lots of them). To kill any given process, you use kill. You need to tell kill which process to kill, and they're all identified by a unique PID (process ID) which is displayed on the left of the ps -aux command.

2) Run top. There's on-line help, but pressing k allows you to kill a process.

I find that method 1 is more effective.

unSpawn · 08-07-2002, 06:13 PM

Also handy are lsof, netstat and fuser.
netstat -anp will show you which process under what PID have open what ports: another way of seeing what services are running,
lsof -p <PID> shows you all the files and sockets a process has opened,
and fuser </path/and/filename> show who has that file in use: kinda handy when you're trawling dir's.

Also if you're concerned with running local or net services you don't need you can dis/enable them using ntsysv or linuxconf.

If you've got time please have a look at CERT UNIX Security Checklist v2.0.

jetblackz · 08-07-2002, 10:20 PM

"how may I know them? " -

RTFM.

Do NOT blindingly kill any background process if you don't know what you are doing. Worst case scenario is... well.. you better don't know.

If you want to reduce the # of services, do so in control center or at install. Type

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