topic Re: Any RedHat linux command equivalent to HP's ndd command in Operating System - Linux

Any RedHat linux command equivalent to HP's ndd command

Patrick Chim — Wed, 11 Jul 2001 05:08:50 GMT

Hi all,

Does anyone know is there any command in Redhat linux has the same function as HP's ndd command as I want to have some network tuning on Linux.

Many thanks,
Patrick

Re: Any RedHat linux command equivalent to HP's ndd command

Sundar_7 — Thu, 12 Jul 2001 11:18:49 GMT

Might be nettune available..

Check it out

Sundar

Re: Any RedHat linux command equivalent to HP's ndd command

Kodjo Agbenu — Fri, 13 Jul 2001 17:31:55 GMT

Hello Patrick,

In Linux, using /proc filesystem is the "official" method for advanced tuning.

Tunable networking parameters are located under /proc/sys/net.

2 ways to use this :

-> You can write something like this :

echo "900" >/proc/sys/net/ipv4/tcp_keepalive_time

-> You can use the /sbin/sysctl command to do the same thing. Check the syntax of /etc/sysctl.conf, then add your parameters accordingly, and finally call "sysctl -p /etc/sysctl.conf" to apply changes.

Remark : it is not recommended to change parameters on live systems, except if you know the exact meaning of the parameters being changed.

Therefore, the best method is to set these parameters during the system boot process.

Using RedHat Linux, this has already been done for you. The script involved is /etc/rc.d/rc.sysinit, which calls sysctl with /etc/sysctl.conf.

Last thing (but not least) : there is a GTK-frontend (Powertweak) that you can use for browsing the parameters and writing them in /etc/sysctl.conf : in graphical environment, just type /sbin/sysctlconfig.

Good luck.

Kodjo

Re: Any RedHat linux command equivalent to HP's ndd command

Patrick Chim — Mon, 16 Jul 2001 01:49:54 GMT

Hi Kodjo,

Your answer is helpful to me. But I want to know whether the unit of 900 is equal to second or not !

Thanks,
Patrick

Re: Any RedHat linux command equivalent to HP's ndd command

Kodjo Agbenu — Fri, 27 Jul 2001 21:02:36 GMT

Hi Patrick,

Sorry for this late answer.

Actually "900" stands for "900 seconds".

To have a detailed list of tunables, if you have kernel sources installed in your system check in /usr/src/linux/Documentation/networking/ip-sysctl.txt.

Otherwise :

http://www.linuxhq.com/kernel/v2.4/doc/networking/ip-sysctl.txt.html

Good luck.

Kodjo

Re: Any RedHat linux command equivalent to HP's ndd command

Patrick Chim — Fri, 27 Jul 2001 22:27:43 GMT

Hi Kodjo,

The URL is good for me ! Thanks for your great help !

Regards,
Patrick