Reset root password on CentOS 6

Step 1: Hard reboot your Server, and Configure in GRUB, Choose “e” to edit GRUB

Step 2: Choose kernel line and type “e”

Step 3: In kernel configuration , we have 2 methods to change to single mode.  สามารถทำได้ 2 แบบคือ
1. we can use number “1″  หรือ
2. we can use character “S”. Enter after done.

Step 4:  Choose kernel which we just made change and type “b” to boot

Step 5:  Now we are in single mode, we can reset password and reboot Server with new root password.
กำหนดรหัสผ่านใหม่สำหรับ root
เสร็จแล้ว reboot 1 ครั้ง

That’s all. Thanks for using IThelpblog.com