How to recover a Dell Ubuntu Image on your Dell Computer

Recovering the Dell Ubuntu Image on your Dell computer

Reinstalling from the Hard Drive

This Operating System reinstall option is used to restore the computer to its original factory settings from a partition on your Hard Drive.

1. Restart your computer. Press the ESC key once after you see the Dell logo to invoke the Grand Unified Bootloader (GRUB) menu on computers with a Unified Extensible Firmware Interface (UEFI) BIOS. (You may need several attempts at this. It is common to press the key more than once and have the computer skip GRUB and go to a command prompt.)
2. Choose Restore OS to Factory State.

• Choose Restore Linux OS partitions and click Continue.

• The computer runs the OEM Configuration Wizard when it is finished. This allows you to choose language and location, time zone, keyboard layout, and first user.

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Reinstalling from the DVD or USB drive

Directions for recovering from a DVD or USB drive that is created from an ISO that the Recovery Media Creator created.

1. Restart the computer and tap rapidly on the F12 key, when you see the Dell logo appear. Select the CD drive, DVD drive, or USB drive from the boot once menu that appears. Whichever is appropriate to the media that you have.
2. The boot menu is similar to an Ubuntu disk. Choose the appropriate recovery option:
   1. Restore Entire Hard Drive – causes all your data to be erased. This is the closest to a factory installation.
   1. Restore only Linux OS Partition.

• The installation proceeds, and you see an on-screen prompt to complete the first-time setup process.

Reinstalling from Live Media

When an upgrade or driver has failed, sometimes reinstalling the operating system is the quickest way to solve the problem.

When reinstalling, the two things you want to keep are:

Starting with Version 8.04 you can reinstall the Ubuntu operating system without losing the content of the /home folder. (The folder that contains program settings, Internet bookmarks, emails and all your documents, music, videos, and other user files.) This can be done even if /home is not on a separate partition. (Which is the case by default if you did not manually separate it when installing Ubuntu originally.)

Note: This operation should not damage your documents. However, the best practice when dealing with operating system files is to backup your documents and settings (including /home hidden files) on external media.

• The /home folder which contains all your files and settings
• The boot menu entries, where you have multiple Operating Systems installed
• Run the Ubuntu installer.
• Follow the prompts until the Installation type (or Allocate disk space) menu.
• Choose manual partitioning (Something-else option), then select Ubuntu partition, set its mount point as /. Be sure to keep the same format type, the same size, and untick the Format checkbox or it deletes all the data! Set any other partitions (/boot, /home) as needed.
• Then finish the installation process. (This may take several hours, like a normal install)
• After reinstalling, user accounts must be re-created with the same login and password.

Credit : https://www.dell.com/