On Mar 25, 2024, at 13:43, Thomas Cameron <thomas.cameron@xxxxxxxxxxxxxxx> wrote: > > On 3/25/24 11:38, Patrick O'Callaghan wrote: >>> On Mon, 2024-03-25 at 11:07 -0500, Thomas Cameron wrote: >>> dmesg > /dev/nvme1n1 >> What's that about? >> poc > > To further clarify, my system uses NVMe drives (/dev/nvme0n1 and /dev/nvme1n1). So when I do dmesg > /dev/nvme1n1 as root, it overwrites the first few hundred k of the NVMe disk, nuking the partition tables and boot instructions and the like. Then when I reboot, it causes my machine to PXE boot. You can nuke any drive by writing to the first few sectors, so it could have been /dev/sda, /dev/vda, /dev/xvda, or whatever. On any modern system that uses UEFI, you can just use “efibootmgr -n ####” to temporarily set the next boot target to be the PXE boot entry (which has its own unique entry, replace #### with its number). Probably also worth deleting the existing entry to boot into Fedora at the same time. Wiping the partition table doesn’t always guarantee that the next boot will be PXE, which is why I liked to automate it specifically. No need to delete or wipe any bootloaders or partition tables, although it probably doesn’t hurt. I had a kickstart that preserved custom stuff like the krb5 keytab between reloads in the kickstart %pre section, so I didn’t want to just nuke the filesystem. -- Jonathan Billings -- _______________________________________________ users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/users@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue
