Updating config in Cisco 2600 router

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