Ubuntu – How to merge two ext4 partitions

You can use gparted for this. Also installable by sudo apt-get update && sudo apt-get install gparted

To make one big fresh partition (deletes all data on your filesystem):

• First you'll have to make sure that both the partitions - unallocated space and the other partition to merge are either both logical partitions or both primary partitions. One logical and one primary will not work.

• After checking and confirming the first step, delete the partition holding a filesystem.

• Third, the unallocated space is now bigger since you have deleted a partition.

• Create a partition of required size.

To increase the size of the partition holding data: (Although this is mostly safe, it's always wise to make a backup of your data!)

• First you'll have to make sure that both the partitions - unallocated space and the other partition to merge are either both logical partitions or both primary partitions. One logical and one primary will not work.

• Second, right-click on the partition in question and click resize. Fill in the size as required.

• Click resize/move and then click Apply all operations