Cisco IOS: What are the 10 Commands You Should Master?

December 5, 2019 Are you looking to become a Cisco IOS expert? There are some commands you need to know. We will be sharing with you ten important commands that you must know when you are working on different configuration and troubleshooting tasks. These commands are as follows:
1. ‘show interface’
This command displays the status of your router’s access server interfaces. This command will provide some output, including an interface status (up/down). It displays statistics about hardware, address, MTU and ARP type, as well as information about Input queue and errors. When troubleshooting a switch, router, or other device, the’show interface’ command can be crucial.
2. Command ‘?’
This command is likely to surprise you. This is a help command, which you know. It is important to understand that Cisco IOS is different than other OS in terms of using ‘help, also known as a question mark. This operating system is known to have a command-line type with thousands of parameters and commands associated with ‘?’.
This command can be used in many different ways. You can use it to list all commands by simply typing? at the prompt. You can also use it to determine the next parameter. This command can also be used to view commands that start with a particular letter. You can type “show C?” to see a list of commands that start with the letter C.
3. ‘show running-config’
This command can be used to display the current configuration of a router or firewall. The command’show-running-config’ does not contain keywords or arguments. It refers to configuration that is stored on RAM. The following command will display information about the building configuration, version, hostname and other information.
4. ‘copy running-config startup-config’
The ‘copy runningconfig startup-config’ command can be used to save the current configuration. The startup configuration file in NVRAM is saved. Non Volatile RAM will save the configuration in case of power loss. This means that if you make changes to the router’s configuration and reboot the router, these changes will not be saved.
5. ‘show ip interface’
This command provides many functional information about the configuration and status of IP services and protocols. You can see all IP-related characteristics for an interface by using the’show interface’ command. Secondary addresses that don’t appear will also be displayed. You can also see statistics about multicast groups and inbound access, Proxy-ARP, and many other things. It is important to mention that’show interface’ and’show ip’ are more popular than show interface’.
6. ‘no shutdown’

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