Task 11.1 Beware about spaces
When playing with verification of your configuration please notice that there is significant difference between these two configuration statements:
username ADMIN password CISCO<space>
username ADMIN password CISCO
When you hit the space bar behind CISCO password IOS will expect "CISCO " in authentication prompt to let you in. You may have encountered similar issue
with "sh run | b rip" and "sh run | b rip<space>".
Verified on 2600XM with 12.4(15)T7 IOS.