root密码丢失了怎么办?

root密码丢失了怎么办?

我用REDHAT LINUX7.2的帐号管理器新建了一个帐号,并且设置了密码.奇怪的是我用root登录的时候却发现密码incorrect,我不知道该怎么办了      
When linux boot ,at the first screen ,enter CTRL+X and at the command line input :linux -s or linux single and the you will come into a mini
linux shell .there you can use :passwd root to change the root's password!