calcchecksum: CalcChecksum (tool for calculating MD5, MD4, CRC32, SHA1)
calcchecksum:
calcchecksum: Calculating  MD5,  MD4,  CRC32,  SHA1  (SHA160), SHA256, 
calcchecksum: RIPE-MD-160, TIGER, HAVAL (128, 160, 192, 224, 256 with 3, 4 
calcchecksum: or 5 passes) on files text-strings or hash-lists generated by 
calcchecksum: md5sum or sha1sum.
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