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jeramey
on Nov 23, 2023
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test, [, and [[ (2020)
Yes, there is. To negate, just use ! as with many other languages.
if ! command …; then do_needed_things fi
ramshorns
on Nov 23, 2023
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How does that work? It doesn't look like ! is a command or shell builtin, so I guess it's an argument to if.
mkl
on Nov 23, 2023
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No, it's part of the shell. Do "man bash" or "man sh", then search with "/\!". From man bash: "If the reserved word ! precedes a pipeline, the exit status of that pipeline is the logical negation of the exit status".
hibbelig
on Nov 23, 2023
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Amazing! I've been writing shell scripts since the 90s and now I still learn something new. Thank you!
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