When you’re installing the Ubuntu or the Linux distribution, there’s a high chance you may encounter a “No Root File System Is Defined” error. The reason this error appears can be:
- During the installation process, you haven’t created an authorized Ubuntu or Linux partition
- Instead of using the designated partitions, you are trying with Windows partitions, i.e., FAT or FAT32
- The Linux partition already exists, but you might not have defined the root partition (“/”)
So, we’ll cover three methods of how to fix the “No Root File System Is Defined” error.
Method 1: Creating a Linux Partition and then Assigning Root Partition
To fix the “No Root File System Is Defined” error by creating a partition in Linux and then assigning a root partition, follow the following steps:
- Go to the “Installation Type” page and check the “Free Partition” box.
- Now click on the “+” sign at the bottom left side of the screen to add the partition.
- “Create Partition” pop-up will appear on your screen; configure the following settings to proceed:
Size: Remove the previously entered size of the partition and enter your value in MB.
Type of New Partition: Select either the “Primary” partition option or “Logical” partition option.
Location for New Partition: Select either the “Beginning of this space” option or “End of this space” option.
Use As: Select the file system “Ext4 Journaling File System”
Mount Point: Select root partition, i.e. “/” from the drop-down menu
- Click “Ok” to confirm the changes.
Method 2: Deleting the Existing Windows Partition
To fix the “No Root File System Is Defined” error in method 2, you have to delete the already existing Windows partition from your system. Make sure to delete the FAT or FAT32 file system first. Once done, follow these steps:
- To delete the partition from your system, right-click on it and select the “Delete” option.
- You can also select the “Change” option to change the file system to a Linux system.
- When you click on the Change option, a drop-down menu will appear.
- Choose your desired file system, then click “Ok” to finish.
Method 3: Defining Root Partition
To fix the “No Root File System Is Defined” error, you have to define a root “/” to ensure partition. Follow the following steps to complete the procedure:
- Right-click on your preferred partition and click on the “Change” option.
- For ease, you can also double-click on the name to make a partition.
- Once the “Edit Partition” box pops-up, choose “/” in the “Mount Point” section.
- Now click “Ok” to complete.
- From here, you can continue with your normal Ubuntu installation.
