thanks for your advice mr. B10m... i found that the /proc filesystem is a virtual file...that is why i need to copy the the /proc/cpuinfo into cpuinfo.dat files.. i think that is the better way on how that i can modify the filesystem.... when i copy the virtual file, i hope i can load the value from the copied file into my Perl/GTK application... anyway,thanks for your advice... :) mm..sorry friends if this topic is not related to this site...im sorry.. ;)