code: 9ferno

ref: 44ce0097b612a1fefd754065bdf8d9d2e5ef60c8
dir: /man/1/sum/

View raw version
.TH SUM 1
.SH NAME
sum, md5sum, sha1sum \- calculate file's checksum
.SH SYNOPSIS
.B sum
.IR file " ..."
.PP
.B md5sum
[
.I file " ..."
]
.SH DESCRIPTION
.I Sum
prints the 32-bit checksum (actually a CRC), length in bytes, and name of each
.IR file ,
one per line.
It ignores directories.
.PP
.I Md5sum
prints the MD5 message digest (as 32 hexadecimal digits) and the name of each
.IR file ,
separated by a tab,
one per line.
If no files are given, the standard input is read.
.PP
.I Sha1sum
is similar, but uses the US National Institute of Standards and Technology's secure
hash algorithm SHA1 instead of MD5.
For each
.IR file ,
it prints its SHA1 secure hash (as 40 hexadecimal digits) and the file's name,
separated by a tab,
one per line.
If no files are given,
.I sha1sum
reads the standard input.
.SH SOURCE
.B /appl/cmd/sum.b
.br
.B /appl/cmd/md5sum.b
.br
.B /appl/cmd/sha1sum.b
.SH SEE ALSO
.IR cmp (1),
.IR wc (1),
.IR crc (2),
.IR keyring-sha (2)