http://my.oschina.net/mastere/blog/424221
http://blog.csdn.net/farsightliuht/article/details/8642933
http://www.cnblogs.com/zdz8207/archive/2012/01/30/2332436.html
http://my.oschina.net/mastere/blog/424221
http://blog.csdn.net/farsightliuht/article/details/8642933
http://www.cnblogs.com/zdz8207/archive/2012/01/30/2332436.html
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))