求助，求助。fedora17

bash: [: 参数太多
bash: [: =: 期待一元表达式
bash: [: =: 期待一元表达式
bash: [: =: 期待一元表达式
bash: [: 参数太多
bash: [: =: 期待一元表达式
bash: [: =: 期待一元表达式
bash: [: =: 期待一元表达式
bash: [: =: 期待一元表达式
[shit@localhost ~]$ su -root
su：无效选项 -- r
请尝试执行"su --help"来获取更多信息。
[shit@localhost ~]$ su - root
密码：
-bash: [: too many arguments
-bash: [: =: unary operator expected
-bash: [: =: unary operator expected
-bash: [: =: unary operator expected
-bash: [: too many arguments
-bash: [: =: unary operator expected
-bash: [: =: unary operator expected
-bash: [: =: unary operator expected
-bash: [: =: unary operator expected
[root@localhost ~]#



那位大神可以告诉位这是什么情况阿，新手，昨天看见fedora17更新了，就心痒痒的想感受下，就升级了，用的yum，就成这样子了。