I've got a Cisco 2600 router and don't know much about how to configure it. I figured some things out today that I'm sure I'll forget again.
To login:
telnet router
(enter password)
enable
(enter password)
To show runtime configuration:
show run
To configure an interface's settings:
configure
int FastEthernet0/1
To turn off arp timeout:
no arp timeout
To turn on arp timeout:
arp timeout 300
To exit configuration mode press CTRL-Z.
To save running configuration for use at startup:
copy run start
Or:
copy running-config startup-config