I've installed the `hashalot` first to use the sha256.  
 Then something strange happened when using the command + filename: 

```
mlockall: Cannot allocate memory
Warning: couldn't lock memory, are you root?
Enter passphrase:

```

I've never needed to enter passphrase before for this as far as I remember. And if I do provide a password or use `sudo` before running the command I get strange characters on result: 

```
��z�9��E-�c���F�K��"�x~�(8�J��

```

I am on an OS based on Ubuntu (Elementary OS Freya).