shell 变量里的字符串替换 ${file/search/replace}

m_fe_css_test_url="http://g.alicdn.com/aliyun/m-aliyun-yunqi/0.0.84/css/blogDetail.css"
echo ${m_fe_css_test_url/g.alicdn.com/140.205.132.240}

输出结果

http://140.205.132.240/aliyun/m-aliyun-yunqi/0.0.84/css/blogDetail.css

http://blog.csdn.net/augusdi/article/details/41010041