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cksum(1P, 1p) write file checksums and sizes
cksum(1) checksum and count the bytes in a file

CKSUM(1) User Commands CKSUM(1)

cksum - checksum and count the bytes in a file

cksum [FILE]...
cksum [OPTION]

Print CRC checksum and byte counts of each FILE.
--help
display this help and exit
--version
output version information and exit

Written by Q. Frank Xia.

GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
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Copyright © 2020 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.

Full documentation <https://www.gnu.org/software/coreutils/cksum>
or available locally via: info '(coreutils) cksum invocation'
April 2020 GNU coreutils 8.32