You are reading this because you probably received the error message “No Root File System is Defined” during Ubuntu installation. This guide provide a quick fix.
What Causes “No Root File System is Defined” Error?
The error message will come up when you are installing a Ubuntu or other Linux distributions. I once received this error when I was installing Ubuntu.
This may be caused by any of the following:
- You have not created a valid Linux partition
- You are trying to use a Windows partition (FAT or FAT32) to install Ubuntu
- A Linux partition exists but you have NOT defined the root partition (“/”)
Fix for “No Root File System is Defined” Error
Follow the steps below to fix this error message and continue your Ubuntu Linux installation.
Below are the solutions:
Method 1 Fix for “No Root File System is Defined” Error: Create a Linux Partition and Assign a Root Partition
Follow the steps below:
- On the Installation type page, select a free partition. Then click the + sign to add a partition.
- When you click the + sign, the Create partition window will load.
- On the Create partition window configure the following:
- On the Size field, the default will be the full size of the partition. Enter a value here in MB.
- Then select the type of partition, Primary or Logical partition.
- On the Location for the new partition, select Beginning of space or End of space.
- Next, select a file system. I selected the default, Ext4 journaling File system
- Finally, select a Mount point. The Mount point drop-down shows the following options:
- When you finish, click Ok.
Method 2 Fix for “No Root File System is Defined” Error: Delete Existing Windows Partition
If you received “No Root File System is Defined” Error because you selected a FAT32 or FAT file system, you have to delete it. When you delete the partition, it will appear as a free partition. You can then use the steps in the last section to re-create the partition.
- To delete a partition, right-click it and select Delete.
- You may also select Change to change the file system to a Linux file system.
- When you click Change, the highlighted part of the image below will load. To change the file system to a Linux file system click the Use as drop-down. Select a file system. Then click Ok.
Method 3 Fix for “No Root File System is Defined” Error: Define a Root Partition
The “No Root File System is Defined” error may still occur if you have a partition but did not define a root (/) partition.
If there is no root mount point, no partition will have the / as mount point. See the image below.
To fix this:
- Right-click on the partition you wish to use as root and select Change. You may also double-click the partition.
- When Edit partition option opens, beside Mount point click the drop-down and select /. Then click Ok.
One of the solutions suggested in this guide should fix this error. If you have any question or comment use the “Leave a Reply” form at the end of this page.
Alternatively, you could share your experience so that other readers can benefit from it.
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