Reset password

Press e to edit the grub

Ubuntu, Debian

• When root has no password:
  • select receovery mode
  • select root user
    • then you will be droped into busybox with root access

• When root has a password:
  • Add init=/bin/bash to linux line
  • mount -o remount,rw /
  • passwd
  • reboot

Redhat, CentOs, Fedora

• Add to linux16 line:
  • rd.break
  • enforcing=0

ctrl+x to boot it will drop us to ramdisk

mount -o rw,remount /sysroot

chroot /sysroot

passwd

exit

mount -o ro,remount /sysroot

exit

restorecon /etc/shadow

setenforce 1

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Lecture notes

• All lecture notes are available at github in ipynb format: https://github.com/ravexina/linux-notes.

• There are html exports of project available at: https://ravexina.github.io/linux-notes.

License

Linux Notes by Milad As (Ravexina) is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

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