GRUB2
2 ways to update and rebuild initrd image in CentOS/RHEL 7 and 8
Steps to extract, modify, update and rebuild initrd image in CentOS RHEL 7 and 8 ISO DVD with examples using XZ / LZMA format Update initrd with modules drivers …
2 ways to boot with old kernel version in RHEL 8 using grubby
Steps to set default boot kernel in RHEL 8 using grubby and boot with old kernel version. Check the kernel version which will get activated after reboot
How to update GRUB2 using grub2-editenv and grubby in RHEL 8 Linux
Set and Modify kernel command line arguments, update GRUB2 in RHEL 8 using grub2-editenv, grubby and grub2-mkconfig with examples to disabled IPv6 RHEL 8 Linux
How to set default boot kernel on Linux ( CentOS / RHEL 7 )
How to set default boot kernel in linux? Change the default boot entry for kernel ? Boot with old kernel version ? Revert to previous kernel version ?
How to protect GRUB2 from booting kernel without password in Linux
Learn to set password to protect grub2 from booting a kernel without password. in rhel 7.To set password and protect grub2 remove unrestricted in menuentry