Ubuntu reset root password command line

Reading the comments under your question, it seems as you have lost total access to your root account. So you can neither run from a normal session, nor can you access the recovery shell, which requires the root password.

So you have the following options left:

Either reinstall your system...

or reset the password from a live USB/DVD system. Follow these steps:

1. If you already have an Ubuntu DVD or USB stick, skip to step 4.
2. If you don't have an Ubuntu- or other Linux-ISO file, download one, e.g.

   the current Ubuntu release.

3. Burn it to a DVD (e.g. with Brasero) or extract it to an USB stick (e.g. with Startup Disk Creator or any similar program which doesn't ask for root permission)
4. Boot the DVD or USB and select "Try Ubuntu without installing"
5. From within the live system, open a terminal and find out, which is your system partition: .

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This will list all your partitions, of all connected drives. Your USB stick partition will be mounted as , so it'll be another drive. Search for an EXT4 pa

how to reset root password in ubuntu 22.04
how to recover root password in ubuntu