有时候需要获取shell脚本文件所在的路径
直接pwd会获取当前执行路径
使用dirname获取
#!/bin/bash
echo "Script executed from: ${PWD}"
BASEDIR=$(dirname $0)
echo "Script location: ${BASEDIR}"
Shell script current directory? - Stack Overflow
原文：https://www.cnblogs.com/azureology/p/15167304.html