What should I do if I forget my password for Ubuntu system users?

Change the password of the user who directly enters the order.

The steps to solve the problem of forgetting the password of the ubuntu system are as follows: (the demonstration uses the system, and the operation of other ubuntu versions is roughly the same).

1. Turn on the Ubuntu system and select the second item "Advanced options for Ubuntukylin GNU Linux".

2. Select the second item (with recovery mode at the end).

3. Enter Ubuntu's recovery mode.

4. Finally, enter passwd on the keyboard and enter your new password.

Ubuntu's default root password is random, i.e. there is a new root password every time you boot up.

Solution: 1. You can enter the command "sudo passwd" in the terminal, and then enter the password of the current user"enter"。

2. The terminal will prompt us to enter a new password and confirm, and the password at this time is the new password of root.

3. After the modification is successful, enter the command su root, and then enter the new password.

Change the password of GRUB to enter single-user mode.

1 Restart the Ubuntu system, press and hold the shift button to enter the GRUB menu after powering on, and select the second advanced mode.

2 Select Recovery Mode in Advanced Mode, and press E on the keyboard to enter the mode.

3 Look for RO in the mode and change it to RW mode (writable recovery mode). CRTL+X into the system.

Here Binge specifically declares that he refuses**, the method is the latest version, the latest kernel modification method!

4 Although the menu to enter the mode is written in read-only mode, in fact, we have changed the permission to be writable, so that we can change the password at will.

Mode menu selects root command line to execute mode input.

5 passwd Change the password of the root user.

passwd + username Change the password for a username! After the modification is completed, reboot and reboot into the system!

6 After restarting, verify whether the password you just changed can be used.

When configuring SAMB in Ubuntu, I accidentally changed the password of the administrator "wangqh", and when I logged in as the wangqh user again, the password was incorrect.

The solution is as follows:

1.Restart ubuntu, press and hold the shift button to enter the grub menu interface when you have just started;

2.Select Recovery ModePress enter to enter. recover menu menu:

3.Select root, press enter, and the root terminal will appear below:

4.However, when you change the password of wangqh, an error message is reported: authentication token manipulation error

5.If you get the error, enter:

root@ubunto:~# mount -no remount,rw /

root@ubunto:~# mount -a

Then change the username. Restart OK

The solution is as follows:

1. Turn on the computer when the screen appears"press esc to enter grub message"press the ESC key immediately.

2. Then there will be three options for you to choose from"recovery mode"Press Enter (second option as shown in the image below).

3. Enter the next selection interface. Select root-drop to root shell prompt

4. Your computer will enter the shell from boot and enter it when the command prompt appears"passwd username"The username here is your username, if you can't even forget your username, you can enter it first"ls /home"Check the username and enter the above commands.

5. Input"passwd username", when a prompt appears, you can directly enter your new password and confirm it again.

6. Enter again at this time"shutdown -r now"Restart your computer and enter with your new password.

In contrast, such a simple method is much easier to reinstall the system.

I haven't forgotten my password, but the above says that the password can also be changed, without any attempt. Enter ls home and you'll see your username. Restart the machine and the login is successful. Hope.

The method of changing the user's password in the ubuntu system is as follows:

Right-click on the blank space of the Ubuntu system desktop, select Open in Terminal, and enter the command line;

Enter the passwd username in the command line, for example, if the username is joe, then type passwd joe and press enter.

In the pop-up interface, enter the original password according to the prompts, and after the system confirms, enter the new password twice according to the prompts, and press Enter when you are finished.

You'll need to create a password for your first account. This can be done with the passwd command. You'll be prompted to enter your old password once and your new password twice.

[root@bigboy root] passwd paul changing password for user paul new password: retype new password:

passwd: all authentication tokens updated successfully.[root@bigboy root] users may later change their own passwords.

This example illustrates that the user Paul does not have the privilege to change his password. [paul@bigboy paul]$ passwd changing password for paul old password: your current password enter the new password (minimum of 5, maximum of 8 characters) please use a combination of upper and lower case letters and numbers.

new password: your new password re-enter new password: your new password password changed.

paul@bigboy paul]$