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Resizing Ubuntu 20.04 Root Partition with LVM

Ubuntu 11
Quick Answer

Resizing the root partition of Ubuntu 20.04 with LVM involves extending the logical volume (LV) using the lvextend command and then resizing the file system using the resize2fs command. It is important to have a backup of your data before proceeding with this process.

Introduction

In this article, we will walk you through the process of resizing the root partition of Ubuntu 20.04 when using Logical Volume Management (LVM). LVM is a tool in Linux that provides a higher-level view of the disk storage on a computer system and allows for flexibility in disk space management.

Before we start, it’s important to remember that resizing partitions and file systems can be risky. Always ensure you have a complete backup of your important data before proceeding.

Preparing for the Process

Before we begin the resizing process, we need to understand the current disk usage and partition layout. This can be done using the lsblk command.

lsblk

This command will list all block devices and their mount points. In this case, we are interested in the root partition, which is typically /dev/sda3.

Next, we need to check the current disk usage and available space on the root partition. This can be done using the df -h command.

df -h

This command will display the disk space usage of all mounted file systems. The -h option makes the output more human-readable by displaying sizes in GB (Gigabytes) or MB (Megabytes).

Resizing the Logical Volume

If you have enough free space on the physical volume (PV), you can proceed with resizing the logical volume (LV) and the file system.

First, we use the lvextend command to increase the size of the LV.

sudo lvextend -L +100G /dev/ubuntu-vg/ubuntu-lv

In this command, -L specifies the new size of the logical volume, and +100G means we are adding 100GB to the current size. /dev/ubuntu-vg/ubuntu-lv is the logical volume path.

Resizing the File System

After extending the LV, you need to resize the file system to utilize the additional space. For this, we use the resize2fs command.

sudo resize2fs /dev/ubuntu-vg/ubuntu-lv

This command resizes the file system on the root partition to occupy all the available space in the logical volume.

Verifying the Changes

Once the file system is resized, you can verify the changes by running df -h again. You should see the increased size of the root partition.

Conclusion

Resizing partitions and file systems in Linux can be a complex task, but with the right tools and knowledge, it can be done relatively easily. In this article, we have shown you how to resize the root partition of Ubuntu 20.04 using LVM.

Remember, it’s always recommended to backup your important data before making any changes to the partition or file system. Also, while this guide focuses on Ubuntu 20.04, the same steps can be applied to other versions of Ubuntu or other Linux distributions that use LVM.

For more information on LVM, you can refer to the official Ubuntu documentation.

Can I resize the root partition without using LVM?

No, LVM is required to resize the root partition in Ubuntu 20.04. LVM provides the necessary flexibility and management tools for resizing partitions.

Is it necessary to backup my data before resizing the root partition?

Yes, it is highly recommended to backup your important data before resizing the root partition. Resizing partitions and file systems can be risky, and having a backup ensures that you can restore your data in case of any issues.

Can I resize the root partition if there is not enough free space on the physical volume (PV)?

No, you need to have enough free space on the physical volume to resize the root partition. If there is not enough free space, you may need to free up space by deleting unnecessary files or resizing other partitions.

Can I resize the root partition using a live USB or live CD?

Yes, it is possible to resize the root partition using a live USB or live CD. You can boot into the live environment and follow the same steps mentioned in the article to resize the root partition.

Can I resize the root partition on a dual-boot system?

Yes, you can resize the root partition on a dual-boot system. However, it is important to be cautious and ensure that you are resizing the correct partition to avoid any issues with the other operating system.

Will resizing the root partition cause any data loss?

Resizing the root partition using LVM should not cause any data loss. However, it is always recommended to backup your important data before making any changes to the partition or file system to be on the safe side.

Can I use these steps to resize partitions on other Linux distributions?

While this guide focuses on Ubuntu 20.04, the steps mentioned can be applied to other versions of Ubuntu or other Linux distributions that use LVM. However, it is always recommended to refer to the specific documentation or guides for your distribution to ensure compatibility and proper execution of the steps.

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