Ubuntu 18.04 (AWS) ext4 FS

Here is how to add a new EBS volume to an existing EC2 instance and make it available to the Linux operating system.

After attaching the volume to the EC2 instance in AWS, follow these steps to add it to the file system.

lsblk

Use this command to find the device identifier, such as /dev/xvdf.

mkfs.ext4 /dev/xvdf

mkdir /mnt2

mount /dev/xvdf /mnt2

Do not forget to update /etc/fstab to make the change persistent.

LABEL=cloudimg-rootfs    /    ext4   defaults,discard    0 0

/dev/xvdb    /mnt    ext4    defaults    0   0

/dev/xvdf    /mnt2   ext4    defaults    0   0

If you need to resize the volume, do so in the AWS Management Console and wait for the operation to finish. Then run the following command to make the additional space available:

resize2fs /dev/xvdf