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This wikiHow teaches you how to change the root password in Linux, if you remember your current password or can’t remember your root password.
Steps
In case of remembering the current root password
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Open a terminal window. To open this window, press Ctrl + Alt + T , [1] X Research Source to open a new terminal window with Command Prompt (command line interpreter) in most Linux desktop environments.
- If you’re not using a desktop environment, you’re already using the Command Prompt, so proceed to the next step.
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Type su in the Command Prompt, and then press ↵ Enter . [2] X Research SourcePassword: will open below Command Prompt.
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Type the current root password, then press ↵ Enter . Once the password is approved, you will return to the Command Prompt as the root user.
- If you typed the wrong password, run su and try again.
- Passwords are case sensitive.
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Type passwd and press ↵ Enter . The line Enter new UNIX password: will appear at the bottom of the prompt.
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Type the new password and press ↵ Enter . The password you type will not appear on the screen.
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Retype the new password and press ↵ Enter . You will see the message “password updated successfully”.
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Type exit and press ↵ Enter . This step helps you to log out of the root account.
In case you do not remember the current root password
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Restart the computer.
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Press E in the Grub menu. [3] X Research Sources The Grub menu appears as soon as you turn on your computer. Usually, this menu only appears on the screen for a while.
- If you can’t press E before the Grub menu disappears, you’ll need to restart your computer and try again.
- This method can be applied with most popular Linux distributions (such as Ubuntu, CentOS 7, Debian). There are many Linux distributions available, some of which are unknown. If you can’t switch to single-user mode this way, you’ll need to visit your distro’s website for instructions specific to your system.
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Scroll down to the line starting with linux /boot . Press the ↑ and ↓ keys to do this. You need to edit this line to boot in single user mode.
- In CentOS and some other distributions, the command line may start with linux16 instead of linux .
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Move the cursor to the end of the line. Press the → , ← , ↑ , and ↓ keys to place the cursor immediately after ro .
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Type init=/bin/bash after ro . Now the end of the line looks like this:
ro init=/bin/bash .
- Notice the space between
roandinit=/bin/bash.
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Press Ctrl + X . This step causes the system to boot directly as a root-level Command Prompt in single user mode.
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Type mount –o remount,rw / into the prompt and press ↵ Enter . This step helps to mount the file system in read-write mode.
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Type passwd in the prompt and press ↵ Enter . When you boot in single-user mode, you’ll have root access, so there’s no need to add any extra parameters to the passwd command.
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Type the new root password and press ↵ Enter . The characters you type will not be displayed on the screen. This is normal.
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Retype the new password and press ↵ Enter . When the system confirms that you have re-entered the correct password before, you will see the line “password updated successfully”.
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Type reboot –f and press ↵ Enter . This command helps to reboot the system normally.
Advice
- Your password should consist of 8 or more characters, a combination of letters (upper and lowercase), numbers, and special characters.
- To change the password for another user, use su as root and type passwd <username> .
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This article is co-authored by a team of editors and trained researchers who confirm the accuracy and completeness of the article.
The wikiHow Content Management team carefully monitors the work of editors to ensure that every article is up to a high standard of quality.
This article has been viewed 14,239 times.
This wikiHow teaches you how to change the root password in Linux, if you remember your current password or can’t remember your root password.
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