Here is some Cisco Commands to get started. 
?                           enter at any time for help at any command level
enable                      enter super user command mode
config term                 enter configuration mode
show ?                      display show commands
show <protocol> route       display routing table for protocol
                            where protocol = ip, ipx, apple, vines, etc
show interface              display interface information status and statistics
show <protocol> interface   display protocol specific interface statistics
                            where protocol = ip, ipx, apple, vines, etc
show processor cpu          display cpu information
show processor mem          display memory information
show controller cxbus       display controller information

clear counters              clear interface counters

Log problems to a TFTP server

exception core-file /cisco/dump/rsa301.txt
exception dump 192.9.200.219