I forgot to mention the --ignore-swap parameter, sorry. From tomb's man page:
By default, Tomb will abort any create and open operation if swap is used
(see SWAP section for details). This flag will disable this behaviour. NOTE:
it is not secure to do so, unless you know that your swap is encrypted.
So you should read the man page first (when you have installed tomb):
$ man tomb
Then you know what to do. After reading it myself again, I realized I have
made quite a few mistakes in my previous posts. The command to start the
interactive tomb creation mode is:
$ sudo tomb-open
(Yes, it is "tomb-open") After creating a tomb, a key and password for it,
you can open the tomb like this:
$ sudo tomb open --ignore-swap -k /path/to/your/key /path/to/your/tomb-file
(Yes, now it is "tomb open")
--ignore-swap parameter is mandatory if you have a swap partition.
-k parameter specifies the location of the key.
Again, sorry for giving you false instructions. I hope this helps. Remember
that creating a tomb can take some time even if you are creating a small one.
Please, give tomb a second try and don't let my mistakes hinder you.
Happy Hacking.