singleuser mode in fedora

https://fedoraproject.org/wiki/How_to_reset_a_root_password

While booting the system the GRUB2 menu will be displayed, to boot the system using bash follow these steps:

• Use the arrow keys to select the boot entry you want to edit
• Press e to start editing that entry
• Use the arrow keys to go to the line that starts with linux or linux16
  • If you have a UEFI system it's the line that starts with linuxefi
• Go the the end of that line add a space then rw then another space and init=/bin/bash
  • If your disk is encrypted, you may need to add plymouth.enable=0 as well
• Press Ctrl-x or F10 to boot that entry