Launch parted with the following command.  Specify the disk you want to modify.  In this case /dev/sda.

sudo parted /dev/sda

Print partition and available free space.  If you just run print, it will not show you the available free space.

(parted) print free

You can resize, or rather extend a partition using the “resizepart” command inside parted.  Command syntax is as follows

(parted) resizepart PartitionNumber End

Example: Resize partition 1 to 30GB.  Note you’ll need to specify the end part with the GB, otherwise, you’ll be shrinking the partition or making a mess…  You can see what space is available with the “print free” command above

(parted) resizepart 1 30GB

After you have run the resizepart in parted, you’ll need to grow the filesystem, so run one of the following commands from the local shell.

resize2fs /dev/sda1

Or for XFS partitions

xfs_growfs /dev/sda1

You can check the partition size with

df -h

or

sudo fdisk -l /dev/sda