cksum(1)

💅 cksum(1) — General Commands Manual 🎀

okay bestie, welcome to the manual for cksum, no cap. this is cksum(1) from the General Commands Manual section and she is literally the moment. let's go 🦋

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✨ NAME ✨

cksum — Print CRC and size for each file

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🌸 SYNOPSIS 🌸

cksum [-a|--algorithm] [--untagged] [--tag] [-l|--length] [--raw]
[-c|--check] [-w|--warn] [--status] [--quiet] [--ignore-missing]
[--strict] [--base64] [-z|--zero] [--debug] [-h|--help] [-V|--version]
[file]

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💖 DESCRIPTION 💖

Print CRC and size for each file

that's the whole vibe. checksums, sizes, one file or many. slay. 💅

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✨ OPTIONS ✨

• -a, --algorithm <ALGORITHM> — pick which digest type you want to use. the full DIGEST rundown lives down in EXTRA, go look 👀

Possible values:

• sysv
• bsd
• crc
• crc32b
• md5
• sha1
• sha2
• sha3
• blake2b
• sm3
• sha224
• sha256
• sha384
• sha512
• blake3
• shake128
• shake256

• --untagged — makes a reversed style checksum, and it leaves the digest type off. no tag, no label, just vibes ✨
• --tag — makes a BSD style checksum. this one is the default, so she's the main character 👑
• -l, --length — the digest length in bits. important rules, bestie, write these down 🖊️: it must not exceed the max size, and it must be a multiple of 8 for blake2b. also it must be 224, 256, 384, or 512 for sha2 or sha3. so like, do not freestyle the numbers here.
• --raw — emits a raw binary digest, not hexadecimal. it's giving ✨unfiltered✨
• -c, --check — reads checksums from the FILEs and checks them
• -w, --warn — warns you about checksum lines that are improperly formatted. she will absolutely tell on them 🙈
• --status — doesn't output anything at all, the status code is the whole story (it shows success)
• --quiet — doesn't print OK for each file that verified successfully. less yapping, same correctness 🫶
• --ignore-missing — doesn't fail or report status for missing files. we simply do not perceive them 💀
• --strict — exits non-zero for improperly formatted checksum lines. zero tolerance era 🔥
• --base64 — emits base64-encoded digests, not hexadecimal
• -z, --zero — ends each output line with NUL, not newline, and disables file name escaping
• --debug — prints the CPU hardware capability detection info that cksum uses. nerdy and iconic 🧚
• -h, --help — Print help
• -V, --version — Print version

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🌈 EXTRA 🌈

DIGEST determines the digest algorithm and the default output format. here's the whole lineup, fr fr:

• sysv: (equivalent to sum -s)
• bsd: (equivalent to sum -r)
• crc: (equivalent to cksum)
• crc32b: (only available through cksum)
• md5: (equivalent to md5sum)
• sha1: (equivalent to sha1sum)
• sha2: (equivalent to sha{224,256,384,512}sum)
• sha3: (only available through cksum)
• blake2b: (equivalent to b2sum)
• sm3: (only available through cksum)

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⭐ VERSION ⭐

v(uutils coreutils) 0.7.0

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heads up bestie: some of these digests are only reachable through cksum itself (crc32b, sha3, sm3), so don't go looking for them anywhere else. and the -l, --length rules above? those are hard limits, not suggestions. 💅

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okay that's the whole page, and we're signing off with the cutest little footer moment: this is cksum from uutils coreutils, version 0.7.0, dated cksum(1). she ate and left no crumbs. periodt 🎀💖✨