Please run the following commands to resize a partition.
IMPORTANT NOTE: Don't forget to change partition address from /dev/sdb2 to your actual partition!
CHANGES ARE DONE IN TWO OR THREE PLACES.
Example below are for /dev/sdb2 partition which is called like "/dev/sdb 2" for growpart
and like "/dev/sdb2" for resize2fs & e2fsck.
Requirements: * growpart; * resize2fs; * e2fsck if disk requires checking.
Install growpart in arch/manjaro: pikaur -S growpart
(resize2fs and e2fsck are usually bundled with OS)
sudo growpart /dev/sdb 2