md5sum

NAME

       md5sum - compute and check MD5 message digest

SYNOPSIS

       md5sum   [-bhtvV]   [-c   file]   [-s[string]]  [--binary]
       [--check=file]   [--help]   [--string[=string]]   [--text]
       [--verbose] [--version] [file...]

DECRIPTION

       This  manual  page  documents  the  GNU version of md5sum.
       md5sum produces for each input file  an  128-bit  "finger-
       print" or "message-digest" or it can check with the output
       of a former run whether the message digests are still  the
       same (i.e. whether the files changed).

   OPTIONS
       -b, --binary
              Treat  all  input  files  as binary.  This normally
              does not make any difference on  UN*X  systems  but
              some systems have a different internal and external
              representation of texts (especially the end-of-line
              characters).

       -c, --check=file
              file  should  be  the  output  of  a  former run of
              md5sum.  The file has in each line the MD5  sum,  a
              binary/text  flag, and a file name.  This file will
              be opened (with each possible  relative  path)  and
              the  message  digest is computed.  If it is not the
              same as given in this line it  will  be  marked  as
              failed.

       -h --help
              Print an usage message and exit.

       -s, --string=string
              Instead  of computing the message digest for a file
              compute it for the given string.  The result is the
              same  as  for  a  file  with  contains exactly this
              string.

       -t, --text
              Treat all input files as text files.  This  is  the
              reverse option to --binary.

       -v, --verbose
              Verbosely write information about the process.

       -V, --version
              Print  version  information on standard output then
              exit.