Linux command mode beeps on action
 

I am using Linux version 2.6.27.23-0.1-default (suse) and trying to switch myself on Linux command mode. For this I pressed ctrl+alt+fn1. It was working fine. when I tried to use common commands like cd dirname then every time it produces beep sounds on hitting return key. It is irritating..Is there any way I can mute this.

Thanks

That's really weird. I don't know what causes this behaviour, but as a workaround you can do:
this reduces to 0 the length of the beep sound.

Still beeping..!!

What is the value of the PS1 variable?

Sorry, I dont know how to check this value.. However I tried these

echo $PS1
PS1: Undefined variable.

PS1='$'
PS1=$: Command not found.

and I am using csh shell

This is a valuable piece of information! The PS1 variable is the prompt configuration in sh/bash (FYI if you put the escape \a in PS1, it will beep at every prompt display).

I guess, since you're running on suse, you have /bin/tcsh and not the original C-shell /bin/csh. In that case you can try

If I used:

echo $SHELL
/bin/csh

I dont know much but as per command output, I think I am using csh shell.
and I tried set nobeep also..again it is not working.

In my Opensuse box:
Anyway, I wonder where the beeps come from? Do you hear them even in a terminal from the X windows system?

You are absolutely correct, its is tcsh only.

And it is not producing any beep while using X windows system.

Ok. My last clue is to try the special alias beepcmd, that sets a command to run when the shell wants to ring the terminal bell. Try
Also which is the value of the prompt variable (the equivalent of PS1 above)?

Here is the value

>echo $tcsh
6.15.00


and alias beepcmd ':' didn't work.

By the way..Thanks a lot for your support.

As a very last resource you can try
according to the tcsh man page it use a screen flash rather than the audible bell. Otherwise, see in the BIOS if you have a setting related to system beep (or bell) and disable it.

neither it is giving error not solving problem..I will try for the BIOS setting.

There is a module called something like pcspkr. Try to unload it.

Thank You very Much Valery..It is working.
For unloading the pcspkr, I used the following.

http://thedaneshproject.com/posts/ho...beep-in-linux/