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
- .
- In the boot menu, press e to enter the GRUB editor.
-
Use the arrow keys to find the following line:
<code>linux16 /vmlinuz-0-rescue-0ec373f68251446a502f01c251031839b6f5f44d7d066749d0e24d0.x86_64 root=LABEL=/ rw</code>
- Press e to edit the line.
-
Find
root=LABEL=/ rw
and replace it with the following:<code>init=/bin/sh</code>
- Press Ctrl X to boot into single-user mode .
Method 2: Using Rescue Mode
- In the boot menu, select "Rescue Mode".
-
After the system starts, you will be prompted to enter the following command:
<code>/usr/bin/switch_root /sysroot</code>
- 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:
- Run
passwd username
, whereusername
is the username whose password you forgot. - The system will prompt you to enter a new password.
- Enter the new password twice.
The new password has now been set. You can restart the server to log in with the new password.
The above is the detailed content of What to do if you forget your username and password in centos7. For more information, please follow other related articles on the PHP Chinese website!

CentOS is suitable for enterprise and server environments due to its stability and long life cycle. 1.CentOS provides up to 10 years of support, suitable for scenarios that require stable operation. 2.Ubuntu is suitable for environments that require quick updates and user-friendly. 3.Debian is suitable for developers who need pure and free software. 4.Fedora is suitable for users who like to try the latest technologies.

Alternatives to CentOS include AlmaLinux, RockyLinux, and OracleLinux. 1.AlmaLinux and RockyLinux rebuild RHEL 1:1, providing high stability and compatibility, suitable for enterprise environments. 2. OracleLinux provides high performance through UEK, suitable for users who are familiar with the Oracle technology stack. 3. When choosing, stability, community support and package management should be considered.

CentOS alternatives include RockyLinux, AlmaLinux, and OracleLinux. 1. RockyLinux and AlmaLinux provide stable distributions compatible with RHEL, suitable for users who need long-term support. 2. CentOSStream is suitable for users who focus on new features and development cycles. 3. OracleLinux is suitable for users who need enterprise-level support.

CentOS needs alternatives because CentOSStream no longer provides long-term support. Alternative options include: 1. RockyLinux, which provides 10 years of life cycle support, suitable for users who need stability. 2.AlmaLinux also provides 10 years of support and has strong community support. 3. OracleLinux, provides RHEL-compatible version, and flexible life cycle management.

The end of CentOS has had a significant impact on users, with users having the option of RHEL, AlmaLinux, Debian or Ubuntu as alternatives. 1. The migration cost is high, requiring time and money. 2. Community division affects open source projects. 3.RHEL provides commercial support, but it is costly. 4.AlmaLinux is similar to CentOS and has low migration costs. 5. Debian and Ubuntu need more time to adapt.

CentOS is suitable as an enterprise-class server operating system because it is stable, secure and free. 1) It is based on RHEL and provides high compatibility with RHEL. 2) Use yum for package management to ensure that the software is easy to install and update. 3) The community regularly releases security patches, with a support cycle of up to 10 years.

The reason why CentOS stopped maintaining is RedHat's strategic change. User response strategies include: 1. Migrating to other distributions, such as UbuntuServer, Debian or RockyLinux; 2. Continue to use CentOS7 until June 2024; 3. Turning to CentOSStream; 4. Build solutions, such as custom distributions based on RHEL or using container technology.

RedHatendedsupportforCentOStoshifttowardsacommerciallyfocusedmodelwithCentOSStream.1)CentOStransitionedtoCentOSStreamforRHELdevelopment.2)ThisencourageduserstomovetoRHEL.3)AlternativeslikeAlmaLinux,RockyLinux,andOracleLinuxemergedasreplacements.


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