NOT(1)

💅 NOT(1) — a fish-shell icon, bestie

okay so real talk, this is the not page from the fish-shell manual and honestly? she's short, she's powerful, she's giving main character energy in like four lines of docs. let's get into it 🫶

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✨ NAME ✨

not — negate the exit status of a job. that's it. that's the whole vibe. she flips your exit codes and dips 💅

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🎀 SYNOPSIS 🎀

not COMMAND [OPTIONS ...]
! COMMAND [OPTIONS ...]

literally two ways to spell the same slay ✨

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🌸 DESCRIPTION 🌸

okay so here's the tea: not negates the exit status of another command. and the logic is exactly what you'd expect, no cap:

• if the exit status is zero, not returns 1 🫠
• otherwise, not returns 0 👑

that's it. that's the whole personality. she's a hater in the most useful way possible 💖

also, a lil heads up: some other shells only support the ! alias, so if you're out here being portable, ! is your girl. iykyk 😌

the -h or --help option displays help about using this command. use it if you're ever like "wait what does this do again" — no judgment, we've all been there 🧚

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🌈 EXAMPLE 🌈

okay this is the moment, this is the example that ate 💅 the following code reports an error and exits if no file named spoon can be found:

if not test -f spoon
    echo There is no spoon
    exit 1
end

the way that this is literally the matrix reference in the official docs and nobody talks about it 😭 iconic behavior fr fr. note that not is doing the heavy lifting: test -f spoon fails when there's no spoon, not flips that failure into a success, and the if block runs. no spoon? no problem. exit 1 and tell them about it 🔥

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👑 Copyright 👑

fish-shell developers 🐟💜

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okay bestie, that's the whole page — go negate something responsibly, and remember: every exit status deserves a vibe check ⭐💖

this was NOT(1), version 4.9, dated Sep 08, 2026 — signed, sealed, and slayed by yours truly 🎀🦋