BSD

Berkeley Standard Distribution.
This is Berkeley Universities Implementation of UNIX. Although BSD is not a registered UNIX BSD includes source code from the original System V in its kernel.

see FreeBSD, OpenBSD, NetBSD.

Haha, I laughed as the linux kiddie ran his outdated bind exploits on my OpenBSD
server.

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ping

Tool for testing network connectivity.
Uses ICMP )(internet message control protocol). Sends an icmp packet to target remote host(s). Commonly you can specify options such as the payload , ttl , sequence number, and offset.

The unix admin used ``ping`` to test out
the new router.

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