27 lines
1.3 KiB
Plaintext
27 lines
1.3 KiB
Plaintext
Edit GRUB before Debian boot
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During you machine boot process, you should be presented with GNU GRUB screen with countdown, before the default boot option is activated.
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Press any key during the countdown period stop the boot process, and then press e key to edit the commands before booting.
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One you have entered into editing mode, find the line starting with linux, followed by /boot/vmlinuz-*, and containing section with root=UUID=.
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Line should be towards the end, usually two lines before the final line.
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On the end of that line, in most case after ro quiet, add one of the following two: init=/bin/bash or init=/bin/sh, as shown on picture below.
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After you have added the init value, press Ctrl+x or F10 key to boot the with the selected options.
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Debian should now boot to single user mode, with the root filesystem mounted in read-only mode.
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You need to remount it to read-write mode with the following command:
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mount -n -o remount,rw /.
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After that you can use passwd command to change the root password to a new value.
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Type passwd to be asked for a new password, and then reenter the new password again, once asked to retype it, and you should then be presented with following message:
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passwd: password updated successfully
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You can now reboot your machine, and use the new root password on your system.
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