83 lines
2.6 KiB
Groff
83 lines
2.6 KiB
Groff
.\" DO NOT MODIFY THIS FILE! It was generated by help2man 1.50.1.
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.TH SHA1SUM "1" "April 2025" "GNU coreutils 9.7" "User Commands"
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.SH NAME
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sha1sum \- compute and check SHA1 message digest
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.SH SYNOPSIS
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.B sha1sum
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[\fI\,OPTION\/\fR]... [\fI\,FILE\/\fR]...
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.SH DESCRIPTION
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.\" Add any additional description here
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.PP
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Print or check SHA1 (160\-bit) checksums.
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.PP
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With no FILE, or when FILE is \-, read standard input.
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.TP
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\fB\-b\fR, \fB\-\-binary\fR
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read in binary mode
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.TP
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\fB\-c\fR, \fB\-\-check\fR
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read checksums from the FILEs and check them
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.TP
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\fB\-\-tag\fR
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create a BSD\-style checksum
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.TP
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\fB\-t\fR, \fB\-\-text\fR
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read in text mode (default)
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.TP
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\fB\-z\fR, \fB\-\-zero\fR
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end each output line with NUL, not newline,
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and disable file name escaping
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.SS "The following five options are useful only when verifying checksums:"
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.TP
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\fB\-\-ignore\-missing\fR
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don't fail or report status for missing files
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.TP
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\fB\-\-quiet\fR
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don't print OK for each successfully verified file
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.TP
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\fB\-\-status\fR
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don't output anything, status code shows success
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.TP
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\fB\-\-strict\fR
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exit non\-zero for improperly formatted checksum lines
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.TP
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\fB\-w\fR, \fB\-\-warn\fR
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warn about improperly formatted checksum lines
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.TP
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\fB\-\-help\fR
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display this help and exit
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.TP
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\fB\-\-version\fR
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output version information and exit
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.PP
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The sums are computed as described in FIPS\-180\-1.
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When checking, the input should be a former output of this program.
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The default mode is to print a line with: checksum, a space,
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a character indicating input mode ('*' for binary, ' ' for text
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or where binary is insignificant), and name for each FILE.
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.PP
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There is no difference between binary mode and text mode on GNU systems.
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.SH BUGS
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Do not use the SHA-1 algorithm for security related purposes.
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Instead, use an SHA\-2 algorithm, implemented in the programs
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\fBsha224sum\fP(1), \fBsha256sum\fP(1), \fBsha384sum\fP(1), \fBsha512sum\fP(1),
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or the BLAKE2 algorithm, implemented in \fBb2sum\fP(1)
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.SH AUTHOR
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Written by Ulrich Drepper, Scott Miller, and David Madore.
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.SH "REPORTING BUGS"
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GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
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.br
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Report any translation bugs to <https://translationproject.org/team/>
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.SH COPYRIGHT
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Copyright \(co 2025 Free Software Foundation, Inc.
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License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
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.br
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This is free software: you are free to change and redistribute it.
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There is NO WARRANTY, to the extent permitted by law.
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.SH "SEE ALSO"
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\fBcksum\fP(1)
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.PP
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.br
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Full documentation <https://www.gnu.org/software/coreutils/sha1sum>
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.br
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or available locally via: info \(aq(coreutils) sha1sum invocation\(aq
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