removing files for the computer
 

how can i tell linux to search all the files, lets say begun with the letter a, and remove them?

Use find. Example: find /home/myhome -name "a*" -exec rm -f {} \;. ## End period not part of cmdline

The {} will be replaced with the path and filename matching the -name parameter.

this why ill find and remove files only at /home/myhome.
i want to find and remove files from all the file system.

Then replace /home/myhome with / (or what ever starting directory you want to use). Also, if you'd like more information on using find, type "man find".

there's a better workaround if you want to delete all files

mkfs <partition name>, usually like /dev/hda1

I hope your "lets say begun with the letter a" is just a hypothetical example, because if you run:
you will totally bork your system...

:D
it is, but tell me can i use kill -9?:D

Sure. kill -9 just kills processes, it doesn't permanently affect any files...

it wasnt a real Q u know.