Provided by: ucspi-tcp_0.88-6_amd64
who@ - prints the list of active users on a remote host.
who@ [ host ]
who@ connects to TCP port 11 (Systat) on host and prints any data it receives. It removes CR (\015) and converts unprintable characters to a visible format. If host is not supplied, who@ connects to the local host. Some computers respond to port 11 with a list of active users. For example, they may be running tcpserver -RHl0 0 11 who using tcpserver.