What is "Pinger"?

Pinger is a smallish Tcl/Tk script for doing ping testing of an IP computer network.

Why do we need Pinger?

Both UNIX and Windoze have a built-in command called "ping" which sends an ICMP ECHO message to a specified host and listens for a reply.

[RS] Depending on what you want... For seeing whether a computer is reachable,
 catch {exec ping $host} res
returns 0 if the ping was successful, and 1 if not. The variable ''res'' contains the output of ping, if you want to analyze it more in depth :^)