GRUB2

Argument to fix some graphical issues in Proxmox install:
nomodeset

remove

Reset Root Password

1. enter GRUB2 edit mode 2. modify linux-kernel string by adding rd.break at the end 3. press CTRL+x to boot with entered options 4. use chroot to mount /sysroot to / chroot /sysroot, pwd should read / 5. remount the root file system in read/write mode mount -o remount,rw / 6. run passwd to set new password passwd 7. create hidden file .autorelabel to run SELinux relabeling on all files touch .autorelabel 8. exit the chroot shell and reboot