Linux startup mode settings and root user password modification

1. Modify the startup mode:

Enter command line terminal to use this command

[Email protected] ~]# Vi/etc/inittab

Id:5:initdefault:

5 for graphical interface mode

3 for multi-user developer mode

Tap I into edit mode, change 5 to 3

Executive Esc->:wq->reboot

Modified successfully!

2. Change the root password:

A. Start the system,

B. Let it stop at the start of the interface, just click on a key on the keyboard, this will enter the operating system configuration Boot interface,

C. According to the prompts, tap the keyboard e key, edit the boot information

D. Locate the kernel option and, as prompted, tap the E key

E. Append parameter 1, log in to the system in single-user mode

F. Enter

G. Tap the B key to start the system

H. Enter the passwd command to reset the password

3. To prevent arbitrary password changes, grub can be encrypted:

A. Using grub-md5-crypt

B. Enter the password to generate the encrypted password

C.

Vi/boot/grub/grub.conf

D

#文件头添加password--MD5 $1$uga2b1$driidrvtegvg95fhhx4h./

E. This time again to enter the single user name change password is not