topic Re: Check the system information. in Operating System - Linux

Check the system information.

eric_204 — Tue, 02 Dec 2003 19:27:14 GMT

I have a Red Hat Linux system , how can I exactly know the OS , kernel version and the SWAP memory system ? thx.

Re: Check the system information.

Rick Garland — Tue, 02 Dec 2003 20:03:39 GMT

The command "uname -a" will provide the kernel & OS info. In the /proc directory you will see a file called "swaps" - view this file and it will tell you how big swap is and on what partition.

Re: Check the system information.

Stuart Browne — Tue, 02 Dec 2003 20:06:58 GMT

All pretty simple.

Kernel version/revision: uname -r

RH distribution : cat /etc/redhat-release

Swap details : grep ^Swap: /proc/meminfo
(these are total, available, in use).

The entire /proc/meminfo might be of interset to you however, as it lists a great deal of other interesting memory details.

Re: Check the system information.

Stuart Browne — Tue, 02 Dec 2003 20:09:21 GMT

Ooo.. swaps.. forgot about that one! I was trying to remember a command that listed them for you (I vaugely remember 'swapon -l', but that isn't it).. oh my fading memory *pout*..

Re: Check the system information.

Rick Garland — Tue, 02 Dec 2003 20:10:13 GMT

A little more info. The /proc directory will contain a lot of info about your system. Example, on my RH there is a file called cpuinfo and this file contains lots of info concerning the CPU - what type,, how fast, cache size, etc. Also look at the meminfo file as there is some info about swap in addition to lots of other info concerning memory in general. Look at the version file as well. Bottom line, look at all of the files in this area - just don't make any changes.

Re: Check the system information.

Mark Grant — Tue, 02 Dec 2003 22:29:16 GMT

Just a little addition to the swap thing. As almost everybody relies on /proc for all sorts of information even though you can not guarantee that the format of /proc will not change (or indeed still exist) from one release of Linux to the next, your best bet for swap is

swapinfo -s

Re: Check the system information.

Stuart Browne — Tue, 02 Dec 2003 22:51:43 GMT

Mark,

what dist/version are you using? None of my RH7/8/9 boxes have 'swapinfo'.

Re: Check the system information.

Sergejs Svitnevs — Wed, 03 Dec 2003 01:39:23 GMT

A way to find out how much swapspace is being used:

# free

Regards,
Sergejs

Re: Check the system information.

Ragu_1 — Wed, 03 Dec 2003 02:05:08 GMT

Adding up to all other replies, I request you to look into `vmstat'. The `si' and `so' fields are to be noted. If these values are high, you need to increase RAM. `man vmstat' is quite interesting!

Re: Check the system information.

Mark Grant — Wed, 03 Dec 2003 03:29:57 GMT

Stuart

sorry, it was early in the morning when I posted that and i had just been woken up for a support call :)

It was supposed to be

"swapon -s"