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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

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Check two conditions in bash ? [solved] (programming.dev)

submitted 6 days ago* (last edited 5 days ago) by Rick_C137@programming.dev to c/linux@lemmy.ml

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Hi,

I trying to test two condition together (AND) under bash but it's not working...

The goal is ti have True when two variables are either not set or empty (empty string)

I've tried

if [[ -n VARIABLE1 && -n VARIABLE2 ]]; then
    echo "OK"
fi

Here I get the "OK" no matter what .

Thanks.

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[–] DeuxChevaux@lemmy.world 8 points 6 days ago (2 children)

[ condition1 ] && [ condition2 ] && echo "Good" || echo "Bad"

[–] suff@piefed.social 14 points 6 days ago* (last edited 6 days ago)

Explanation

[ is an alias for the program test, so you can call man test for more info.
&& is bash syntax for conjunction. In A && B, B will only be called if A returned a exit code >0 (error). You can call man bash for more info.
|| is bash syntax for disjunction. In A || B, B will only be called if A returned exit code =0 (success). true and false are programs that just return exit codes 0 respectively 1.

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