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<\/a><\/figure>\n\n\n\n<\/p>\n\n\n\n
Select “Advanced Options for Ubuntu.” <\/p>\n\n\n\n
<\/p>\n\n\n\n <\/p>\n\n\n\n Now select the the highest revision, followed by (recovery mode). Press Enter.<\/p>\n\n\n\n <\/p>\n\n\n\n <\/p>\n\n\n\n The system should display a menu with different boot options. Use the arrow keys to navigate to the option labeled root and press Enter.<\/p>\n\n\n\n <\/p>\n\n\n\n <\/p>\n\n\n\n The system should respond by giving you 2 options.<\/p>\n\n\n\n Press Enter for Maintenance (or press Ctrl-D to continue):<\/p>\n\n\n\n Press “Enter.”<\/p>\n\n\n\n This will give you command-line interface with a prompt. Now, we need to remount the drive with the appropriate permissions.<\/p>\n\n\n\n At the prompt, type:<\/p>\n\n\n Press Enter. This should allow you to make changes to the data on the hard drive.<\/p>\n\n\n\n Change the Password<\/p>\n\n\n\n At the prompt, type:<\/p>\n\n\n Substitute the name of the user for username, then press Enter. The system asks you to type a new UNIX password and then to retype it.<\/p>\n\n\n\n Once you\u2019ve entered and confirmed the new password, reboot the system by entering the following:<\/p>\n\n\n Hit Enter, and your system should restart. Let the system come up to the login screen, and test to make sure the new password works.<\/p>\n\n\n\n Boot the system. You will see a menu. Press “e” on the keyboard. This will drop you into the Grub menu.<\/p>\n\n\n\n <\/p>\n\n\n\n On the Grub editing screen, use your arrow key and move to the end of the line starting with \u201clinux\u201c. <\/p>\n\n\n\n <\/p>\n\n\n\n <\/p>\n\n\n\n There at end of this line type, type the following:<\/p>\n\n\n\n <\/p>\n\n\n <\/p>\n\n\n\n Next, re-boot your system with Ctrl+X or F10.<\/p>\n\n\n\n Now we will have Debian 11\u2019s shell with root access. Let\u2019s check if we have read and write access to the file system where the OS has been installed.<\/p>\n\n\n\n For that use the command:<\/p>\n\n\n If the output is: (rw,realtime)., then it means you have real-time- read and write access to the file system.<\/p>\n\n\n\n Let\u2019s change the password as we do normally on a Linux system using the command terminal.<\/p>\n\n\n\n Type:<\/p>\n\n\n If a different user, type:<\/p>\n\n\n Replace “user” with the user you are changing the password for. Enter the password 2 times.<\/p>\n\n\n\n <\/p>\n\n\n\n <\/p>\n\n\n\n Once you are done resetting your Linux password then restart your system to log in with the changed password. For rebooting, type:<\/p>\n\n\n\n <\/p>\n\n\n Hit “Enter.”<\/p>\n\n\n\n The password should be changed.<\/p>\n\n\n\n Power on your CentOS 8 system. Select the kernel you want to boot into. Next, press \u2018e\u2019 on the keyboard to interrupt the boot process and make changes.<\/p>\n\n\n\n <\/p>\n\n\n\n <\/p>\n\n\n\n Locate the ro (read-only) kernel parameter as highlighted below.<\/p>\n\n\n\n <\/p>\n\n\n\n <\/p>\n\n\n\n Scroll down till you find the line starting with “linux16.” Here change the “ro with rw init=\/sysroot\/bin\/sh.”<\/p>\n\n\n\n <\/p>\n\n\n\n <\/p>\n\n\n\n To access the system, enter the following command:<\/p>\n\n\n\n <\/p>\n\n\n<\/a><\/figure>\n\n\n\n<\/a><\/figure>\n\n\n\n<\/a><\/figure>\n\n\n\n\nmount \u2013o rw,remount \/\n<\/pre><\/div>\n\n\n
\npasswd username\n<\/pre><\/div>\n\n\n
\nshutdown \u2013r now\n<\/pre><\/div>\n\n\n
Debian<\/h2>\n\n\n\n
<\/a><\/figure>\n\n\n\n<\/a><\/figure>\n\n\n\n\nrw init=\/bin\/bash\n<\/pre><\/div>\n\n\n
<\/a><\/figure>\n\n\n\n\nmount | grep -w \/\n<\/pre><\/div>\n\n\n
\npasswd\n<\/pre><\/div>\n\n\n
\npasswd user\n<\/pre><\/div>\n\n\n
<\/a><\/figure>\n\n\n\n\nexec \/sbin\/init\n<\/pre><\/div>\n\n\n
CentOS<\/h2>\n\n\n\n
<\/a><\/figure>\n\n\n\n<\/a><\/figure>\n\n\n\n<\/a><\/figure>\n\n\n\n