Mr Joe Steeve (ILUGC-Member) & Team has developed the IJammer, an
Instant Messenger Jammer. IJammer is a Daemon that runs on one
workstation of a LAN and prevents any IM traffic on that LAN.
URL: http://sarovar.org/projects/ijammer/
One Day One Command
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sha1sum – Compute & Check Secure Hash Algorithm Std 1 message digest.
Summary:
`sha1sum’ computes a 160-bit checksum/fingerprint/message-digest for
each specified file. `sha1sum’ can also determine whether a file &
checksum are consistent. The sums are computed as described in
FIPS-180-1 (www.itl.nist.gov/fipspubs/fip180-1.htm).