as mentioned above, I have a cryptsetup full disk encrypted device on /dev/sda at 192.168.0.3. And I am at 192.168.0.2.
$ sudo cryptsetup luksOpen user@192.168.0.3:/dev/sda encHDD
$ sudo mount /dev/mapper/encHDD /mnt/encHDD
$ ls -lha /mnt/encHDD
How can I make this command possible?