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Linux reset forgotten root password

Q. I forgot my root password, how can I get into my system?

A. You can reset forgotten root password under Linux by booting system into single user mode or emergency mode (also known as rescue mode).

My boot loader is GRUB (see LILO boot loader below)

)Following is the procedure to reset root password if you are using GRUB as a boot loader:

  1. Select the kernel
  2. Press the e key to edit the entry
  3. Select second line (the line starting with the word kernel)
  4. Press the e key to edit kernel entry so that you can append single user mode
  5. Append the letter S (or word Single) to the end of the (kernel) line
  6. Press ENTER key
  7. Now press the b key to boot the Linux kernel into single user mode
  8. At prompt type passwd command to reset password:

You need to mount at least / and other partitions:
# mount -t proc proc /proc
# mount -o remount,rw /

Change the root password, enter:
# passwd
Finally reboot system:
# sync
# reboot


My boot loader is LILO

At LILO boot loader type linux single and press [ENTER] key:
Boot: linux single
When you get the # prompt you will need to type passwd root to reset password:
# passwd
Reboot system:
# sync
# reboot

See also:

{ 49 comments… add one }

  • shekhar December 14, 2006, 5:03 am

    thanks for useful trick because many time it happens that you forget password

  • kishor August 11, 2007, 11:46 am

    i want password releated information

  • sajid November 15, 2007, 3:49 am

    how to reset root password

    • sapan yadav May 30, 2013, 11:43 am

      please write sudo bash and enter in shell as root and type passwd after that u can change

  • kekelka December 25, 2007, 3:12 pm

    thxu very much for help

  • Pin March 13, 2008, 3:25 am

    Very helpful indeed. Manage to reset now.

  • Sergey August 10, 2008, 2:33 pm

    It’s useful not only to change pass, but also to change permissions, edit configs, etc.

  • S. Nilesh August 10, 2008, 4:36 pm

    what is the “sync” required for ? btw, I don’t think we have to do mounting if instead of S we append 1 to the end of kernel line… 1 is INIT single user mode.

  • Angel Genchev March 18, 2009, 7:51 am

    sync is used to synchronize Disk with OS buffers, e.t. to write any dirty buffers to the disk.

  • manoj June 13, 2009, 5:06 am

    How can i change the root password of another computer from this computer on network

  • Phuc August 22, 2009, 8:02 am

    Great help, thanks

  • George August 29, 2009, 2:57 pm

    I am using Fedora 11 I don’t get the screen with the kernel version come up and I can’t push e to boot to single user mode. What now?

    • georges November 16, 2011, 10:14 am

      you’ll need a live cd for that, and the process will be more complex.
      try posting a thread in linuxquestions.org

  • Maniraj Patri October 16, 2009, 9:56 am

    Will it work for fedora also. Anyway thanks.

  • Syed Mohammed January 13, 2010, 3:32 pm

    Dear sir,

    We are using server with linux o/s but the login and password has been misplaced so could you kindly help us geting our server started.

    Your kind favour will be highly appreciated.

    Thanks and kind regards.

    Syed Mohammed

    • georges November 16, 2011, 10:16 am

      did you try what nixcraft suggested, and what was the result?

  • midhu February 16, 2010, 4:58 pm

    thanku so much

  • Suryakant February 17, 2010, 4:19 am

    How to reset password if we forget password in linux?

  • Ramgopal February 25, 2010, 5:44 pm

    Hi vivek,
    Normally in solaris, to reset the password.
    boot cdrom -s
    mount the root disk
    edit the /etc/shadow
    null the value
    save and sync
    umount
    reboot.
    How to reset the root password in solaris, when the disks are under Veritas.
    when it is mirrored under Veritas VM, how do I do? ( consider 2 disks c1t0d0 and c1t1d0). thanks for your time.
    -Regards
    Ram

  • Prabhu May 13, 2010, 1:34 pm

    Thanks for sharing the useful tips

    Rgds
    Vipro Computer Services

  • AJANRAMAN June 10, 2010, 6:01 am

    thank you very much……

  • win August 25, 2010, 6:40 am

    can’t to reset after booting still view “give root password for maintenance or control d” do you have other solution?

  • mangesh October 8, 2010, 8:08 am

    now i am working with linux an i forget the linux server root password so i want solution on that so please help me about that

  • eman October 26, 2010, 2:58 pm

    thanx it worked

  • Richard December 6, 2010, 10:17 am

    Note that :
    1. Linux is case-sensitive.
    2. “single” is a keyword.

    So, you actually need to add ” s” or ” single”.
    (lower case, and you need a space before it)

  • AVIRAL January 25, 2011, 8:36 am

    sir,
    i want to know that if i forget the password of linux. so ho could it possible to work in linux

  • Anon June 20, 2011, 2:37 am

    You can likely just change root’s password using the normal way if you have sudo permissions: “sudo passwd root”. Setting root’s password initially is likely needed anyway under certain cases, such as when you need to ssh/sftp in as root during emergencies.

  • brijesh July 3, 2011, 10:54 am

    Thanks Its working

  • govindaraji July 16, 2011, 7:17 am

    my linux user name & password forget password

  • Macdonald Rukwata August 12, 2011, 8:02 am

    thank you so much i managed to change the password

  • Sunag September 12, 2011, 2:43 pm

    i have the latest natty newhal 11.01 ubuntu that just starts off no grub no loading… but i have stuck up with the root password trying to install the JRE platform…

  • mazhar October 29, 2011, 7:28 am

    Thank Q.
    its help me a lot.

  • Sreekanth November 14, 2011, 3:51 am

    For RHEL-6 do the following in single user mode.

    By default SELinux enabled in RHEL-6 and it will not allow you to change the password.
    Run the below commands to change the password for root.
    #setenforce 0 (check the SELinux changed to Permissive using command “getenforce”)
    then go for password reset
    #passwd

  • Eswaramoorthi.D December 8, 2011, 5:04 am

    Thank you

  • virus December 27, 2011, 8:19 am

    HOW TO CHANGE USERNAME ????????????????????

  • samish July 24, 2012, 11:11 am

    what if my root folder in fedora is comming with red cross sign i cannot open it

  • Array August 8, 2012, 4:36 pm

    i need to access our server hosted somewhere but the password is being forgotten….so how do i access the server from remotely….anyone help pls

  • Usman March 14, 2013, 7:55 am

    Hi,

    upon mounting the /proc mount point, i am getting error to specify the file system too. what should i enter there?

  • Danish Zahur March 29, 2013, 4:41 am

    Working great… Thank you

  • Timothy June 4, 2013, 7:18 pm

    Am a new linux user.I lost my password for linux mint os how can i rest it and create a new user.Also i keep on reset ing my desktop and time setting every time i power on.The system has no memory of previouse logins

  • Vdst July 8, 2013, 7:08 pm

    Awesome, thanks for that bit of info!

  • Calin Vlad December 25, 2013, 10:41 pm

    I encounter the same problem and I solved quite easy I might say
    first I wirte
    user@pc:~$ sudo bash
    [sudo] password for user: (you type your sudo password)
    then it automatically switch to
    root@pc:/home/user#
    here you write
    root@pc:/home/user# passwd
    and the output is
    Enter new UNIX password: (here you write your new password)
    then you hit ENTER
    and
    Retype new UNIX password: (retype your new password)
    and if everything goes perfect
    you should have this output:
    passwd: password updated successfully

  • Pavlos January 21, 2014, 4:38 pm

    My linux system writes

    An error occured during the file system check
    dropping you to a shell? The system will reboot when you leave
    the shell
    Give a root password for maintenance or type control d to continue.

    I don not remember the root password
    what can i do?

  • Pavlos January 21, 2014, 4:40 pm

    My boot loader i GRUB

  • Pavlos January 21, 2014, 4:49 pm

    After the 6th step it starts automatically and it failed

  • Ravichandran Kingmaker March 7, 2014, 12:54 am

    Which is the kernal line?

  • Jean-Vitki June 19, 2014, 3:27 pm

    In my Os the kernel line do not appear
    I use elementary OS Luna

  • Suresh S August 12, 2014, 11:00 am

    very use full contents

  • MM October 26, 2014, 9:46 am

    Hi, how i can reset my root password with putty???

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