To complie and run a test kernel:
----------------------------------


#From the linux source directory.(Note that, you do not need to do this 
                                  for the labs that involve modules.)
make bzImage
cp arch/i386/boot/bzImage /boot/bzImage-test
#shutdown the system and reboot the test image.

etags
------

cd /usr/src/kernel-source-2.6.8
find . -type f -name "*.[c|h]" | gawk '{system("etags --append " $1)}'


in emacs use M-. or the find-tag command
C-u for the next tag.
 
grep
-----

grep -r "string" *


making a copy of the source code to help check for changes
----------------------------------------------------------

(from /usr/src)
# cp -r linux linuxunmodified
(from /usr/src/kernel...)
#for x in `find . -type f -name "*.[chS]"`; do diff $x ../linuxunmodified/$x; done

modules
--------

insmod <mod name>.ko # adding a module 
rmmod <mod name>     # removing a module
lsmod                # listing the modules
cat /proc/modules    # more info about loaded modules


printk
-------

To see them you can just use :

# dmesg

If you wish to see the printks in an xterm then :

# killall syslogd
# killall klogd
# cat /proc/kmsg 
 <the printk will appears as they happen