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This video is based on RHEL 8. Video to cover the section ‘Modify the system bootloader’ for the RHCSA (Red Hat Certified System Administrator).
More information on the required learning: http://bit.ly/rhcsa8
Notes from the video:
As part of the exam you will be only asked to make a minor modification of the grub configuration.
To list the environment options for modification for grub:
# grub2-editenv list
A good example would be to set the current kernel as the default for boot:
# grub2-set-default 0
To view and modify the entire grub configuration for your system:
# vi /etc/default/grub
A simple variable you can modify to test is the GRUB_TIMEOUT_STYLE=countdown
You can simply add a new line in the file and add that entry, this will change the GRUB screen to only show a simple countdown rather than the full bootscreen.
To then apply the configuration:
# grub2-mkconfig -o /boot/grub2/grub.cfg
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