REV(1)

💖 REV(1) — the reverse-every-line glow-up 💖

manual page for rev, from the User Commands girlies ✨

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✨ NAME ✨

rev — reverse lines characterwise 🦋

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🌸 SYNOPSIS 🌸

rev [option] [file...]

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💅 DESCRIPTION 💅

okay so rev is literally the main character of "backwards text" 🎀 It copies the files you name over to standard output, but it flips the order of characters in every single line. Every line. No cap. 💖

If you don't specify any files, bestie, it just reads from standard input. slay. ✨

ngl there's one thing you need to know though 👑 This utility is a line-oriented tool, and it uses an in-memory allocated buffer for a whole wide-char line. So if your input file is huge and has no line breaks in it? Then allocating the memory for the file may be unsuccessful 😭 that's the vibe check and it did NOT pass.

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🎀 OPTIONS 🎀

• -0, --zero — Zero termination. Use the byte '\0' as the line separator. periodt. 💀
• -h, --help — Display help text and exit. iconic. ✨
• -V, --version — Display version and exit. 💜

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🌈 SEE ALSO 🌈

• tac(1)

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🙈 REPORTING BUGS 🙈

For bug reports, use the issue tracker at <https://github.com/util-linux/util-linux/issues> — go tell them, bestie, they wanna know 🫶

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🧚 AVAILABILITY 🧚

The rev command is part of the util-linux package, which you can download from the Linux Kernel Archive at <https://www.kernel.org/pub/linux/utils/util-linux/> 🌸

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okay that's the whole page, love u, go reverse some lines 💖✨

this was util-linux 2.42.4, dated 2026-09-21, and it's giving REV(1) energy forever 👑💅