what does the directories under /proc do?
 

the directories under /proc directory are all named as numbers such like 1, 2,3, 1844, 1845 etc. what are these directories for? just want to know. thx

The proc directory is you window into the running kernel. Those numbers are process numbers on the machine. Try cating some of the files
cat /proc/cpuinfo;
cat /proc/ide/hda/model;
You get the idea.

proc is short for processes, these numbers are the pids of running processes. Theirs also info about the machine as well.

oooo.... got it........thanks!