What to do if you forget your username and password in centos7

If you forget your CentOS 7 login credentials, you can use the following methods to restore access: Through single-user mode: Boot to single-user mode Reset the root password Using rescue mode: Boot from rescue mode Use the switch_root command to access the system root Retrieve password : Run the passwd command and enter the new password to restart the server login

What to do if you forget your CentOS 7 login credentials

If you If you forget your CentOS 7 server username or password, don't panic, there are several ways to restore your access.

Method 1: Restart the server via single-user mode

1. .
2. In the boot menu, press e to enter the GRUB editor.

3. Use the arrow keys to find the following line:

   <code>linux16 /vmlinuz-0-rescue-0ec373f68251446a502f01c251031839b6f5f44d7d066749d0e24d0.x86_64 root=LABEL=/ rw</code>

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4. Press e to edit the line.

5. Find root=LABEL=/ rw and replace it with the following:

   <code>init=/bin/sh</code>

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6. Press Ctrl X to boot into single-user mode .

Method 2: Using Rescue Mode

1. In the boot menu, select "Rescue Mode".

2. After the system starts, you will be prompted to enter the following command:

   <code>/usr/bin/switch_root /sysroot</code>

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3. After executing this command, you will enter the same environment as when you forgot your password.

Retrieve Password

No matter which method you use, once you enter single-user mode or rescue mode, you can use the following steps to recover your password:

1. Run passwd username, where username is the username whose password you forgot.
2. The system will prompt you to enter a new password.
3. Enter the new password twice.

The new password has now been set. You can restart the server to log in with the new password.

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