How to extend the root partition with LVM and extend EXT4 file system.

In Linux, Logical Volume Manager (LVM) is a useful tool that allows you to manage your disk partitions in a more flexible way. With LVM, you can create logical volumes that span multiple physical disks and dynamically resize them without the need to reboot your system.

If you need to extend the root partition of your Linux system, you can use LVM to accomplish this task. Here are the steps you can follow to extend the root partition with LVM and extend the EXT4 file system:

1. First, you need to create a new partition on your disk to hold the additional space. You can use a tool like fdisk or parted to create the partition. Make sure the partition is big enough to hold the amount of space you want to add to the root partition.
2. Once you have created the new partition, you need to initialize it as a physical volume (PV) for LVM. To do this, use the pvcreate command followed by the name of the new partition. For example:bash

pvcreate /dev/sdb1

This command initializes the partition /dev/sdb1 as a physical volume for LVM.

Next, you need to create a new volume group (VG) that includes the new physical volume and the existing physical volume that holds the root partition. To do this, use the vgcreate command followed by the name of the new volume group and the names of the physical volumes. For example:

vgcreate myvg /dev/sda2 /dev/sdb1

This command creates a new volume group called myvg that includes the physical volumes /dev/sda2 and /dev/sdb1.

Now that you have a new volume group that includes the additional space, you can extend the logical volume (LV) that holds the root partition. Use the lvextend command followed by the name of the logical volume and the amount of space you want to add. For example:

lvextend -L +10G /dev/myvg/root

This command extends the logical volume /dev/myvg/root by 10GB.

Finally, you need to extend the EXT4 file system that is on the root partition. Use the resize2fs command followed by the name of the device that holds the root partition. For example:

resize2fs /dev/myvg/root

That’s it! You have successfully extended the root partition with LVM and extended the EXT4 file system. With LVM, you can easily manage your disk partitions and resize them as needed without having to reboot your system or move data around.

If you would like to practice, watch the video:

                                            Tasks.
1. Extending physical disk to 5 Gb
2. Create file 1.txt in /tmp
3. Resize partition to maximum size
4. Resize LVM partition to maximum size
5. Extending the root logical volume to maximum size
6. Extend file system