file of manage

Halleo,   I am a new user of  Debian. For keeping the system run better or solving some problems occured, could anyone tell me what kinds of files to manage the system and where there are, or where I could find this kind information or books?   Thanks   Daniel Hu

printer

We connected the printer with Linux (Debian 1.3) server by hub. It worked well. After someone having done something wrong for example, having connected a new PC with Linux server and tried  printing without installation of the drive of printer, now it always continue to print out something w