This command will save the configuration that is currently being modified (in RAM), also known as the running-configuration, to the nonvolatile RAM (NVRAM).
SEE: Server deployment/migration checklist (Tech Pro Research) #3: copy running-configuration startup-configuration
Keep in mind that config is not saved until you do a copy running-configuration startup-configuration. You change this config when you make changes to the router. The running-configuration is the config that is in the router's memory. The show running-config command shows the router, switch, or firewall's current configuration. For example, show c? will return a list of commands that start with the letter "c". For example, you might type show ip ? If the router requires no other parameters for the command, the router will offer as the only option.įinally, use ? to see all commands that start with a particular letter. You can also use ? when you don't know what a command's next parameter should be. For example, type ? at the command line for a list of all possible commands. First, use it when you don't know what command to type. As the IOS is a command-line operating system with thousands of possible commands and parameters, using the ? can save your day.
However, the Cisco IOS is completely different from other operating systems when it comes to using the question mark (help key).
CISCO IOS COMMAND HOW TO
It may seem entirely too obvious that you should know how to type ? to ask for help when using the Cisco IOS. This quick reference describes 10 commands you'll need to rely on when handling various configuration and troubleshooting tasks. Becoming proficient with the Cisco IOS means learning some essential commands.