The Simple Network Management Protocol (SNMP) is a widely used protocol for monitoring and managing network devices. It allows administrators to collect information about devices, such as their status, configuration, and performance. SNMP has multiple versions, each with its own features and security mechanisms. In Linux, there are several ways to check the version of SNMP that is installed.
One common method is to use the `snmpwalk` command. This command can be used to query SNMP devices for information. When run with the `-v` option, `snmpwalk` will display the version of SNMP that is being used.