Expanding a LUKS drive

First make sure that the drive is opened and mounted. 

 Run the commands 

 sudo cryptsetup resize [Drive]

sudo resize2fs /dev/mapper/[Drive] 

 To find out what [Drive] is supposed to be, examine the following commands output 

 sudo lsblk 

 In the following example it would be crypt-sdf 

 NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT

nvme0n1 259:1 0 20G 0 disk

├─nvme0n1p1 259:2 0 20G 0 part /

└─nvme0n1p128 259:3 0 1M 0 part

nvme1n1 259:0 0 50G 0 disk

└─crypt-sdf 253:0 0 30G 0 crypt /mnt/sda