rpcinfo

rpcinfo is a command line tool used in Unix-like operating systems to query information about RPC (Remote Procedure Call) services on a network. It allows users to enumerate and retrieve details of the RPC services available on a specific host.

By default, when run without any arguments, rpcinfo will display a list of registered RPC programs on the local machine. It provides information such as program number, version number, transport protocols supported, and the port number associated with each program.

When provided with a hostname or IP address as an argument, rpcinfo can query RPC services on a remote machine, allowing users to obtain information about RPC programs running across a network.

With the '-p' option, rpcinfo can display the registered programs on remote machines in a shorter format, showing only the program number and version number.

Rpcinfo can also be used with the '-s' option to display a summary of RPC services on the local machine, giving a count of registered RPC programs categorized by their program numbers.

Additionally, rpcinfo supports the '-u' option to query UDP-based services, '-t' for TCP-based services, and '-b' to query both TCP and UDP. These options help users to retrieve specific information based on the transport protocols used by RPC programs.