最近碰到的小麻烦和解决方式～

1.sudo －S 能够进行用管道传递参数

-S          The -S (stdin) option causes sudo to read the password from the standard input instead of the terminal device.  The password

                   must be followed by a newline character.

 

2.追加文本到textview中

http://www.xuebuyuan.com/2104131.html 用textstorage，很方便