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.TH "SYD\-SUM" "1" "2026\-09\-01"
.PP
.SH NAME
.PP
\fBsyd\-sum\fR \- Calculate checksum of the given file or standard input
.PP
.SH SYNOPSIS
.PP
\fBsyd\-sum\fR \fI\-a alg\fR \fI[\-bhx]\fR \fI<file|\->\fR
.PP
.SH DESCRIPTION
.PP
Given a file, calculate the checksum of the file.\&
.PP
Only regular files and FIFOs (pipes) may be hashed.\&
.PP
Given no positional arguments or "\-" as argument, calculate checksum of
standard input.\&
.PP
.SH OPTIONS
.PP
.TS
l lx
l lx
l lx
l lx
l lx
l lx.
T{
\fB\-a\fR \fBalg\fR
T}	T{
Hash algorithm to use (required).\&
T}
T{

T}	T{
Use \fB\-a list\fR to list available algorithms and their digest sizes.\&
T}
T{

T}	T{
Examples: sha256, sha512, sha3\-512, blake2b\-256, md5, crc32c
T}
T{
\fB\-b\fR
T}	T{
Binary output.\&
T}
T{
\fB\-x\fR
T}	T{
Hexadecimal output (default).\&
T}
T{
\fB\-h\fR
T}	T{
Display help.\&
T}
.TE
.sp 1
.SH EXAMPLES
.PP
.nf
.RS 4
syd\-sum \-a sha256 /usr/bin/syd
echo hello | syd\-sum \-a blake2b\-512
syd\-sum \-a crc32c \-b /etc/passwd > /tmp/crc\&.bin
.fi
.RE
.PP
.SH SEE ALSO
.PP
\fIsyd\fR(1), \fIsyd\fR(2), \fIsyd\fR(5), \fIsyd\-path\fR(1)
.PP
\fBsyd\fR homepage: https://sydbox.\&exherbo.\&org/
.PP
.SH AUTHORS
.PP
Maintained by Ali Polatel.\& Up\-to\-date sources can be found at
https://gitlab.\&exherbo.\&org/sydbox/sydbox.\&git and on Radicle at
rad:z38HCnbmcDegA2BMxuPaPRPMdp6wF.\& Bugs/patches can be submitted to
https://gitlab.\&exherbo.\&org/groups/sydbox/\-/issues.\& Discuss in #sydbox on Libera
Chat or in #sydbox:mailstation.\&de on Matrix.\&