如何避免在特定命令失败时退出shell脚本

Question

以下脚本使用该-e选项运行,因此如果其中的任何命令失败,它将退出:

#!/bin/sh -e
command1 #script should fail if command1 fails
command2 #script should NOT fail if command2 fails
command3 #script should fail if command3 fails

如何让脚本不失败command2？

Answer 1

command1
command2 || true
command3

Answer 2

您可以根据需要关闭设置：

#!/bin/sh
set -e

command1 #script should fail if command1 fails

set +e
command2 #script should NOT fail if command2 fails
set -e

command3 #script should fail if command3 fails