If i can boot from cd and access linux partitiion and files , so i can change the /etc/passwd file and will change root:x:0:0 to root:0:0:0, it may work that way.
But i dont wana delete my linux system, or it will take me a whole more day to install and configure it again. i had different development envirnoments there. is there any other solution. if i did not find any other solution i will then burn a cd. Thanks for the comment . other suggestion are welcome.
