bash return value

回傳值

• echo bash 回傳值

• https://linux.vbird.org/linux_basic_train/centos8/unit08.php

• how to get bash command return

• https://stackoverflow.com/questions/43801947/bash-get-return-value-of-a-command-and-exit-with-this-value

• bash return value

• https://stackoverflow.com/questions/17336915/return-value-in-a-bash-function