Root Password Reset

From PrgmrWiki
(Redirected from Password Reset)

The prgmr.com rescue image can be used to reset the root password for your VPS just as you might use a live CD. If you run BSD, you can also boot the appropriate BSD installer and follow a similar process.

Boot Into Rescue Mode

Shut down your VPS and boot into the rescue mode using the Management Console:

Options:
1. out of band console (press ctrl-] to escape, not resizeable)
2. create/start, opens OOB console (try this if the machine is not running)
3. shutdown (requests clean shutdown, forces off after 4 min)
4. force power off (destroy/hard shutdown)
5. reboot (shutdown + start)
6. set bootloader, rescue mode, or netboot installer
7. view/add/remove ssh authorized_keys
8. view/edit reverse dns
9. install new OS image
a. system details
b. maintenance options
  • Select "system details" and note what "Boot option:" says. Normally this will be set to "Disk".
  • Select "shutdown" to shut down your VPS.
  • When the system shuts down and returns to the console, use option "set bootloader, rescue mode, or netboot installer" and proceed from there. Depending on your VPS type, you will be presented with one of two menus:

    Options:
    1. Boot from disk
    2. Linux-based Live Rescue
    3. Linux netboot installers - install mode
    4. Linux netboot installers - rescue mode
    5. BSD installers
    

    or

    Options:
    1. GRUB legacy(pv-grub)
    2. GRUB2
    3. Linux-based Live Rescue
    4. Linux netboot installers - install mode
    5. Linux netboot installers - rescue mode
    6. BSD netboot installers
    
  • Select Linux-based Live Rescue if you run Linux, otherwise choose the appropriate BSD installer.
  • Go back to the main menu and select "create/start".
  • Reset Your Password

    1. When the rescue image is finished booting, log in as root at the prompt with no password (this example uses the Linux-based Live Rescue):
    2. rescue login: root
      Linux rescue 4.9.0-12-amd64 #1 SMP Debian 4.9.210-1 (2020-01-20) x86_64
      To manually enable ssh access to the rescue image, copy
      your public key to /root/.ssh/authorized_keys and type
      "service ssh start"
      root@rescue:~# 
      
    3. Mount your root filesystem (by default /dev/xvda1) and chroot to it:
    4. root@rescue:~# mount /dev/xvda1 /mnt/
      [   60.024137] EXT4-fs (xvda1): mounted filesystem with ordered data mode. Opts: (null)
      root@rescue:~# chroot /mnt/
      
    5. Change the root password with passwd:
    6. root@rescue:/# passwd
      Enter new UNIX password: 
      Retype new UNIX password: 
      passwd: password updated successfully
      
    7. If you are using CentOS or Fedora, mark the file system for selinux autorelabeling:
    8. root@rescue:/# touch /.autorelabel
      
    9. Exit, unmount, and shutdown:
    10. [root@rescue /]# exit
      exit
      root@rescue:~# umount /mnt
      root@rescue:~# shutdown -h now
               Starting Synchronise Hardware Clock to System Clock...
      
    11. This will return you to the Management Console. You need to set the system to boot normally again. Go to the "set bootloader, rescue mode, or netboot installer" menu and select your original boot option.
    12. Go back to the main menu.
    13. Start the VPS again using "create/start."