e4defrag

Defragment an ext4 filesystem. More information: https://manned.org/e4defrag.

• Defragment the filesystem:

e4defrag /dev/sdXN

• See how fragmented a filesystem is:

e4defrag -c /dev/sdXN

• Print errors and the fragmentation count before and after each file:

e4defrag -v /dev/sdXN