Computes checksum for a file or files.

 Syntax : $ CHKSUM [options] file1 [file2 file3 ...]

 File   names  accepts  wildcards.   Only  the  last  version  will  be
 considered under VMS OS.

 Options are :
	-h	shows this help
	-b	BSD computation with BUFSIZ blocks (default)
	-r	BSD computation with 1Kb blocks
	-s	512-byte blocks SYSV compatible
	-o	1Kb blocks SYSV compatible
	-c	Cyclic Redundancy Check (CRC) checksum and byte count
	-m	MD5 checksum according to the definition of MD5 in RFC 1321