How do I alter the kernel cmdline and rebuild grub2 on CentOS 7?


The kernel command line (cmdline) can be edited in "/etc/default/grub" (GRUB_CMDLINE_LINUX).


Once edited you will need to rebuild the config for grub2 using the following command


grub2-mkconfig --output=/boot/grub2/grub.cfg


You can then reboot and the new cmdline will be used (this can be verified by "cat /proc/cmdline").



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