bash debug
Run bash scripts in a safer way.
bash -x 调试执行
bash -n 测试语法
set -e 异常时马上退出
set -u 把所有未定义的变量视为错误
set -x debug开关
set -o pipefail 在管道连接的命令中,只要有任何一个命令失败(返回值非 0),则整个管道操作被视为失败
set -euxo pipefail
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