standby mode
 

i am using mandrake10.0

now how to put my computer in "standby" mode.

is there any mode in linux?

thanks.

That depends on what YOU mean by "standby mode". I don't know about putting your actual computer itself in standby mode, but to make the monitor switch off & it's LED turn orange or red, do the following:
You need to have both a DPMS capable monitor, which most are, & have DPMS enabled in your X config file.
Find the line in your X config file, which is either /etc/X11/xorg.conf or /etc/X11/xfree86.conf, that configures the monitor, mine is:

Section "Monitor"
Identifier "Monitor0"
ModelName "Monitor 1600x1200"
HorizSync 30.0 - 72.0
VertRefresh 47.0 - 110.0
Option "dpms"
EndSection

Note the line:

Option "dpms"

Make sure that line is there.
Then restart X & at a terminal type:

xset dpms force standby

to enter standby mode, or to switch the monitor off completely, type:

xset dpms force off

Just type xset to see any other options.

Hope this helped, let me know how you went.