. 1, [the root @ localhost ~] # grub2-PBKDF2 the mkpasswd // password-generating password strings
Enter password:
the Reenter password:
grub.pbkdf2.sha512.10000.CAFD1E841CB4C7E790C0AC0ED
87D7FA64BE75F89C53870A829C35CF35FBE379BA1F10773E2377D6FCBB7EB844FF2C422732A123F
2D11DB93D3C210EE94FCB0E1.74D4890C925DEA983782126299404F9977517136B67554B9AC3776E9C0F7
2413ECF7842B35766B9C2424A5E1D43A314AD89EA1BE78DE32C6C1426727AE366153
2, [the root @ localhost ~]} // # CP backup /boot/grub2/grub.cfg{,.bak
3, [root @ localhost ~] # cp // backup /etc/grub.d/00_header /etc/grub.d/00_header.bak
4, [root @ localhost ~] # vim /etc/grub.d/00_header // to file for editing
cat << EOF
set superusers="root"
password_pbkdf2 root grub.pbkdf2.sha512.10000.CAFD1E841CB4C7E790C0AC0ED
87D7FA64BE75F89C53870A829C35CF35FBE379BA1F10773E2377D6FCBB7EB844FF2C422732A123F
2D11DB93D3C210EE94FCB0E1.74D4890C925DEA983782126299404F9977517136B67554B9AC3776E9C0F7
2413ECF7842B35766B9C2424A5E1D43A314AD89EA1BE78DE32C6C1426727AE366153
EOF
. 5, [the root @ localhost ~] # grub2-mkconfig -o /boot/grub2/grub.cfg // Use grub2-mkconfig re ⽣ command files into grub.cfg