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I am trying to set up a PXE boot server and the client boot is failing and dropping into the UEFI interactive shell. The system is Rocky Linux (RHEL8). I have copied the grub2 and shimx64.efi files into the uefi path and set up the dhcp server for network book and provided uefi/shimx64.efi for the UEFI 64-bit filename. I know that the PXE server is working because when I try legacy BIOS it executes the menu defined in pxelinux.cfg/default - so I am confident that the DHCP infrastructure is correct and TFTP is working.

So I cannot work out why the uefi boot will not load the shims. Is there a way to dump tftp logs and see what files are trying to be pulled from the server?

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    Turning on tftp logging will depend on what tftp server you have. If the tftp server is persistent then you can probably use strace -f -p 12345 where 12345 is the PID of the trtpd to get some strong hints about what it is looking for.
    – icarus
    Commented Nov 12, 2021 at 0:47
  • Unfortunately tftp is run by systemd so I have no process to attach to.
    – Bryon
    Commented Nov 12, 2021 at 7:17

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I found the log location for tftp.

tail -f /var/log/messages

This displays all the useful information for debugging what is going on with a PXE server.

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