Difference between revisions of "CentOS 7.x validate whether current system is booted using EFI (UEFI) or not"

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Revision as of 10:18, 26 January 2019

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CentOS 7.x validate whether current system is booted using EFI (UEFI) or not

To check whether current system is booted using EFI (UEFI) or not, use: 

ls /sys/firmware

In case of UEFI boot efi folder would be present


Resolve UEFI boot issues

Sometimes it might be necessary to ensure system boots into UEFI mode and not legacy. This could be due to use of GPT partition table, disk and/or partition sizes greater than 2 TB, dual-booting with UEFI based OS (eg Windows 10), etc.

To be able to boot into UEFI instead of legacy mode, ensure:

  1. Disable fast boot
  2. Disable secure boot
  3. Use 64-bit versions of the OS to be booted into UEFI mode
  4. Ensure UEFI boot is enabled in BIOS
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