https://blog.csdn.net/wangbole/article/details/17579463
解决方法： echo + | （管道）
开始使用
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- echo "admin" | sudo service tomcat7 stop
始终提示输入密码
后来查看了下sudo命令的使用
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- man sudo
发现有如下的解释：
-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.