Location of kernel source code
I am trying to install the Cisco VPN client for Linux on my MDK 9.1 box. I have reached the point where I get the following prompt -
"In order to build the VPN kernel module, you must have the kernel headers for the version of the kernel you are running".
I have to give the location of the kernel source code. It unhelpfully lists the default locations for RH 6.x and 7.x, and for SuSE 7.3. Can someone please point me to the usual default directory in MDK 9.1 which contains the Linux kernel sorce code. (There's nothing unusual about my Mandrake installation, so presumably the kernel source code will be in the default location).