[SLUG] backup for lazyman(ask help)

[henry]

Dear Sirs:         I  want to backup the basic system of linux as tallballs .Then I  can install linux just untar those balls       I found that I can skip many directories(cause I know what they are). but I cant "tar zcvf proc.tgz /proc" , and I am afraid /proc is indispensible for the basic system of linux Is there any way to achieve lazyman's dream ?       By the way , there is lots of directories under /proc named as numbers (like 900 ,901...) , Anyone knows what they are?   Tks in advance Lazyman