It's terrible to use "du /". But if you have to do that, you can try "du / | more". Try to read some fundamental book of Unix provided on web. You can find the answer you want with ease.
UNIX. 1. need the command similar as PROMPT $P$G. That means my command line looks like: $Dou/dousub/dousubsub> 2. I want to see all the directory in my home. like the command TREE/B in Dos. thank you!