centos7修改grub密码

centos7和centos6修改grub密码的步骤有所不同。

1 先在系统里生成加密的密码：

grub2-mkpasswd-pbkdf2 

Enter password: 

Reenter password: 

PBKDF2 hash of your password is grub.pbkdf2.sha512.10000.1367F52B54CF08B325A8AB6185DC12E58AAB5EA32FBCF9FDD694E0884F4AF38FED468A8B388140870F6740E8963AF2853EDDA86AF9591D27125252B006AF9A2D.F8DDC38757049DA9B403E0D56B388C1533755888B93EAC6C98DA9EC42E39D4D7C34EE4ABC6FCA9C5236E6CAC0955AC1D8F24265599761672FE9F3939D52D5671

2 然后找到grub配置文件

cd  /boot/grub2/

cp  grub.cfg  grub.cfg.bak  //最好是备份一下

vim  grub.cfg  //编辑

//在## BEGIN /etc/grub.d/00_header ###下面写入

set superusers="root"

export superusers

password_pbkdf2 root grub.pbkdf2.sha512.10000.1367F52B54CF08B325A8AB6185DC12E58AAB5EA32FBCF9FDD694E0884F4AF38FED468A8B388140870F6740E8963AF2853EDDA86AF9591D27125252B006AF9A2D.F8DDC38757049DA9B403E0D56B388C1533755888B93EAC6C98DA9EC42E39D4D7C34EE4ABC6FCA9C5236E6CAC0955AC1D8F24265599761672FE9F3939D52D5671