If the system administrator password is forgotten, do not want to install the system by the extreme way to solve the problem, it is necessary to use the rescue mode
First, to enter the BIOS to switch to CD-ROM boot, the concrete steps are basic things do not do the description directly skip ...
After the disc is booted, use the UP and DOWN ARROW keys to select ' Rescue installed system ' carriage return
Language we default, direct carriage return
Keyboard type, also default, direct carriage return
Rescue Method also remains the default, because we are using the CD-ROM, enter
This step asks me whether to enable the network when using the rescue mode, this according to the actual situation, here Amin chooses no (uses the TAB key) to enter
The next step, we rescue the environment will find our installed Linux system and mount it to/mnt/sysimage, this step Amin will select ' Continue ' and then enter
After you enter, you will see a small prompt box that tells us that the Linux system is attached to "/mnt/sysimage". If you want to get the root environment, you need to execute the command "Chroot/mnt/sysimage" continue to enter
Continue to enter
At this point, there is a box, there are three modes can choose: Shell mode will go directly to the command line, the operation can be edited files, modify the user password, etc. fakd is a diagnostic mode; reboot will restart directly; this step Amin select the first shell mode and then enter
At this point, you need to enter the command chroot/mnt/sysimage enter the command before you can see the command line before the user changed to SH. Only then can the normal operation to modify the password
Starting from: Linux rescue mode