shell中求字符串的md5

shell中求字符串的md5 参考这篇文章http://ubuntuforums.org/showthread.php?t=532594

~$ echo x
x
~$ echo x| od -bc
0000000 170 012
          x  \n
0000002
~$ echo x | md5sum
401b30e3b8b5d629635a5c613cdb7919  -
~$ echo -n x | md5sum | awk '{print $1}'
9dd4e461268c8034f5c8564e155c67a6
~$ php -r 'echo md5("x");'
9dd4e461268c8034f5c8564e155c67a6
# 封装个函数
~$ md5(){ echo -n $1 | md5sum | awk '{print $1}'; }
~$ md5 x
9dd4e461268c8034f5c8564e155c67a6