Cisco Router Copy Commands

Save the current configuration from DRAM to NVRAM
copy running-config startup-config

Merge NVRAM configuration to DRAM
copy startup-config running-config

Copy DRAM configuration to a TFTP server
copy runing-config tftp

Merge TFTP configuration with current router configuration held in DRAM
copy tftp runing-config

Backup the IOS onto a TFTP server
copy flash tftp

Upgrade the router IOS from a TFTP server
copy tftp flash