ping

Send ICMP ECHO_REQUEST to network hosts

Overview

Used to test the reachability of a host on an Internet Protocol (IP) network.

ping [OPTION]... DESTINATION

Show / manipulate routing, network devices, interfaces

OpenSSH SSH client (remote login program)

Secure copy (remote file copy program)

The non-interactive network downloader

Transfer data from or to a server

Another utility to investigate sockets

networktestreachabilityicmphostping