shell script 變數的預設值

Wei-Hao Syu FreeBSD No Comments

[客家話, hak-Hant-TW]

有這種需要，尋一下網路看到這篇有寫，試捯毋會麻煩，記一下。

#!/bin/sh
$DEFAULT_VAR="VALUE"
VAR="${VAR-$DEFAULT_VAR}"

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