http://wenku.baidu.com/view/bf1955a9f90f76c660371a23.html?from=search
http://wenku.baidu.com/view/4781bec028ea81c758f5781f.html?from=search
http://wenku.baidu.com/view/bf1955a9f90f76c660371a23.html?from=search
http://wenku.baidu.com/view/4781bec028ea81c758f5781f.html?from=search
shell腳本獲取腳本所在目錄 執行腳本的父目錄不一定是當前的工作目錄。 url=$(dirname $(readlink -f $0))