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.
One Day One Command
sha1sum – Compute & Check Secure Hash Algorithm Std 1 message digest.
`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
$ sha1sum file — Compute and print the MD5 checksum of that file.
$ sha1sum -c input.txt — Read checksum and filename from the file and
$ sha1sum -w -c input.txt — Same as above and warn if the checksums
format is wrong in the file.
$ sha1sum –status -c input.txt — Indicate the status in exit status
Read: man sha1sum
Format of input.txt :