自己開個john爆破吧
http://blog.sina.com.cn/s/blog_49ba47640100szhq.html

john支持DES，但是支持MD5吗？

:$1$$qRPK7m23GJusamGpoGLby/:::Blank password
:$1$$IqH.8BV8l9Uhl3qbv9FMq/::1:The password is "1"
:$1$$1IK05/w6QZ5joquig2XBU/::12:The password is "12"
:$1$$GmbL3iXOMZR57QuGDLv.L1::123:The password is "123"
:$1$$iC.dUsGpxNNJGeOm1dFio/::1234:The password is "1234"
:$1$$G5aAC482dt.L2w.OKWpwK/::A:The password is "A"
:$1$$RBsHnkFPN2gYuiekYMm99/::AB:The password is "AB"
:$1$$YNRn2102jYprpjGM/XJ5g/::ABC:The password is "ABC"
:$1$$65zxKXozlDh89rtMMeJAo/::ABCD:The password is "ABCD"
:$1$$Ij31LCAysPM23KuPlm1wA/::a:The password is "a"
:$1$$u4yIOmvnTLdQZRaCd5JTF1::ab:The password is "ab"
:$1$$j0yT3c/2mYPQF09fpvPLb0::abc:The password is "abc"
:$1$$FeoLPPQziGv1BaRCSAjbM1::abcd:The password is "abcd"
:$1$$Pan9TbUnH7tyT4WCEivaw1::!:The password is "!"
:$1$$e0cu84zns3xE7m.49fS0B0::!@:The password is "!@"
:$1$$rJ08NLm/0r8wIwV3zXWfo0::!@#:The password is "!@#"
:$1$$NOta11qB2y/dAqXfEaYQv1::!@#$:The password is "!@#$"
如果是空密码，怎么登陆不上呢

现在很多linux发行版本默认不允许admin账户登录，先用普通用户登录修改配置文件，详情请Google

默认是root用户哦。

另外，不同的发行版中加密方式是不一致的。