SHA1SUM(1)

💖 SHA1SUM(1) — the manual, but make it cute 💖

okay bestie, sit down, hydrate, and let me tell you about sha1sum from the uutils coreutils girlies 💅 this is the manual page, and yeah it's a General Commands Manual one, we're doing this properly.

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✨ NAME ✨

sha1sum — Print or check the SHA1 checksums 🎀

no cap, that's the whole job. she prints them, she checks them, she's booked and busy.

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🌸 SYNOPSIS 🌸

sha1sum [OPTIONS] [FILE]...

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🦋 DESCRIPTION 🦋

Print or check the SHA1 checksums. that's it, that's the vibe ✨

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💅 OPTIONS 💅

• -c, --check — read checksums from the FILEs and check them 👑 she's verifying now, not just printing.
• -w, --warn — warn about improperly formatted checksum lines 😭 like, bestie, that line is malformed, we're saying something about it.
• --status — don't output anything, status code shows success 🤫 silent but the exit code tells the truth.
• --quiet — don't print OK for each successfully verified file 🙈 we're not celebrating every single one, only the relevant tea.
• --ignore-missing — don't fail or report status for missing files 🫶 if it's not there, we're not stressing.
• --strict — exit non-zero for improperly formatted checksum lines ⚠️ messy formatting = messy exit code, periodt.
• --tag — create a BSD style checksum 🎀
• -z, --zero — end each output line with NUL, not newline, and disable file name escaping 💀 iconic for piping into other stuff fr fr.
• -h, --help — Print help 💖
• -V, --version — Print version 🌈

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⭐ VERSION ⭐

v(uutils coreutils) 0.12.0

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🧚 EXAMPLES 🧚

Calculate the SHA1 checksum for one or more files:

sha1sum path/to/file1 path/to/file2 ...

Calculate and save the list of SHA1 checksums to a file:

sha1sum path/to/file1 path/to/file2 ... > path/to/file.sha1

Calculate a SHA1 checksum from stdin:

command | sha1sum

Read a file of SHA1 checksums and filenames and verify all files have matching checksums:

sha1sum [-c|--check] path/to/file.sha1

Only show a message for missing files or when verification fails:

sha1sum [-c|--check] --quiet path/to/file.sha1

Only show a message when verification fails, ignoring missing files:

sha1sum --ignore-missing [-c|--check] --quiet path/to/file.sha1

Check a known SHA1 checksum of a file:

echo known_sha1_checksum_of_the_file path/to/file | sha1sum [-c|--check]

The examples are provided by the tldr-pages project <https://tldr.sh> under the CC BY 4.0 License. Please note that, as uutils is a work in progress, some examples might fail. 🫶

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💖 that's the whole page, bestie 💖 this manual is dated 2026-09-25 and it's the SHA1SUM(1) page from uutils coreutils 0.12.0 — go checksum something, ily, bye 🎀✨