centos5.5 can not boot
 

Hi,everybody!
When the system boot,there is a problem:
/etc/rc.d/init.d/functions:line 19 /sbin/consoletype:cannot execute binary file
/etc/profile.d/lang.sh:line 46: /sbin/consoletype:cannot execute binary file
it cannot boot! How can i fix it?

I hava not CentOS's CD,but i had made a live-usb of debian5,when i entered its rescue mode ,i found it need a CD,then i entered a shell ,but i cannot find the fs,i donnot know how i can mount the fs,because it hadnot mount command,any idea?
I find CentOS had some problem:sometime there is a fs error,all icons cannot load ,then i tried log in the shell,it said there was fs error,however i rebooted the system ,everything was ok!
In all those problem,i had not do any bad thing to the system.