I have my hands on a Cisco IOS based router, so I thought it time to place probably one of the most important commands you will use with an IOS based device on my site.
copy running-config startup-config
The above command copies the configuration that is currently being used/run by the router into the non-volatile memory (NVRAM). The
running-config is basically what is sitting in RAM, if the power goes out it’s wiped. NVRAM is were we store this config for use when the router is started, reset, or when the power fails.
This is one of the area’s were Cisco equipment differs from your average Customer-premises equipment (CPE) gear. This can bite you in the ass if you haven’t dealt with it before.