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156 lines
4.2 KiB
Text
156 lines
4.2 KiB
Text
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= How to reset a root password
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'''
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[NOTE]
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======
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This page was automatically converted from https://fedoraproject.org/wiki/How_to_reset_a_root_password
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It is probably
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* Badly formatted
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* Missing graphics and tables that do not covert well from mediawiki
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* Out-of-date
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* In need of other love
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Please fix it, remove this notice, and then add to `_topic_map.yml`
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Pull requests accepted at https://pagure.io/fedora-docs/fedora-howto
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Once that is live, go to the original wiki page and add an `{{old}}`
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tag, followed by a note like
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....
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{{admon/note|This page has a new home!|
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This wiki page is no longer maintained. Please find the up-to-date
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version at: https://docs.fedoraproject.org/whatever-the-url
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}}
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....
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======
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'''
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Setting up a root password is a mandatory part of a Fedora installation.
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If you forget or otherwise lose your root password, there are procedures
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to reset it.
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* If you have set a password for your boot loader, refer to
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link:#using-installation-cd-dvd[ this section].
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* If you want to reset the boot loader password, refer to
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link:Reset_Bootloader_Password[ these instructions].
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* If none of these scenarios apply to you, proceed to
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link:#Entering_Rescue_Mode[ the next section].
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Fedora uses _targets_ to determine the services being run when you start
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your system. Run level 1 can be used as a rescue mode. Booting Linux
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under run level 1, which is also called _single user mode_, will display
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a root prompt on bootup, from which you can reset the root password.
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[[entering-rescue-mode]]
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Entering Rescue Mode
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~~~~~~~~~~~~~~~~~~~~
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[[using-grub2]]
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Using GRUB2
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^^^^^^^^^^^
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While booting the system the GRUB2 menu will be displayed, to boot the
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system using bash follow these steps:
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* Use the arrow keys to select the boot entry you want to edit
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* Press *e* to start editing that entry
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* Use the arrow keys to go to the line that starts with *linux* or
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*linux16*
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** If you have a UEFI system it's the line that starts with *linuxefi*
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* Go the the end of that line add a space then *rw* then another space
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and *init=/bin/bash*
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** If your disk is encrypted, you may need to add *plymouth.enable=0* as
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well
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* Press *Ctrl-x* or *F10* to boot that entry
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[[changing-root-password]]
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Changing root password
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~~~~~~~~~~~~~~~~~~~~~~
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As root, changing password does not ask for your old password. Run the
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command:
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....
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# passwd
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....
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Enter your new root password twice. Congratulations! You now have now
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reset your root password.
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To make sure that selinux context of file which were now modified is
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restored properly after reboot, run:
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....
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# touch /.autorelabel
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....
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You can than reboot the machine with
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....
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# /sbin/reboot -f
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....
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[[reset-password-using-a-fedora-cddvd]]
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Reset Password Using a Fedora CD/DVD
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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[[using-any-of-the-fedora-live-media]]
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Using any of the Fedora Live Media
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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* Boot the Live installation media
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* After it finishes booting and starts the live session, open a terminal
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and switch to root (using `su`, it won't ask for a password)
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* Create a directory where you can mount the filesystem of your
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installation:
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`mkdir /mnt/sysimage`
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* Mount the filesystem of your installation (/dev/sda1 is just an
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example, be sure to fill in the actual device node of your installation
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root */* partition):
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`mount /dev/sda1 /mnt/sysimage`
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* chroot to your installation:
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`chroot /mnt/sysimage/`
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* Change the root password:
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`passwd`
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* Exit from the chroot:
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`exit`
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That's it, simply reboot your system and then boot the installation from
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the HDD as usual.
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[[reset-password-when-bios-is-password-protected]]
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Reset Password When BIOS is Password Protected
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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If you cannot enter rescue mode because you forgot the BIOS password
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required to select an alternate boot device, you have three options:
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* Refer to your computer's documentation for instructions on resetting
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the BIOS password in CMOS memory, usually by moving a physical jumper.
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* Physically change the boot order.
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* Temporarily move the system hard disk to another machine, and follow
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the procedures above to reset the root password.
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Category:How_to
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'''
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|
|
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|
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See a typo, something missing or out of date, or anything else which can be
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improved? Edit this document at https://pagure.io/fedora-docs/fedora-howto.
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