How To Reinstall Ubuntu

Reinstalling Ubuntu's system files may sometimes be the quickest way to solve a problem, for example if an upgrade failed or if your graphics driver is broken.

Since Hardy it is possible to reinstall Ubuntu 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). This tutorial can also be used to upgrade Ubuntu (eg 11.04 -> 12.04 from a 12.04 live-CD).

Before doing anything

This operation should not damage your documents but, for security, backup your documents and settings (including /home hidden files) on external disk or DVDs. (eg via CloneZilla) Note: Some special applications settings may be in system folders, eg LAMP, see below in the thread.

Run the Ubuntu installer

  1. Run the Ubuntu installer

  2. Follow the prompts until the "Installation type" (or "Allocate disk space") menu
  3. Choose the right option as described below:

Choose the right option

There are two possibilities - choose the one that fits what the installer is showing:

- If an "Upgrade 1X.XX to 1Y.YY" option is available (like in the screenshot below), choose it. http://pix.toile-libre.org/upload/img/1331906258.png

- Or, if the above option is not available, choose manual partitioning ("Something-else" option), then select Ubuntu system partition, set its mount point as "/" (keep the same format type, the same size, and untick the "Format" checkbox). Also set other partitions (/boot, /home... see DiskSpace) if needed.

Then finish the installation process. (this may take several hours, like a normal install)

After reinstalling

After reinstalling, user accounts must be re-created with the same login and password.

See also


CategoryInstallation

UbuntuReinstallation (last edited 2013-11-29 21:10:51 by cweiske)