See my two other guides for installing python 3.2 and an updated version of openssl on Debian 6 first:
You will need to specify your libcrypto location for attic to work. You can specify it in bash before running attic like so:
export ATTIC_LIBCRYPTO_PATH=/usr/lib/libcrypto.so.1.0.0 # your path might be different, check your /usr/lib folder to see.
You can add
export ATTIC_LIBCRYPTO_PATH=/usr/lib/libcrypto.so.1.0.0 to
.bashrc as well so it's there everytime for that user (root). I added it directly to a script that calls attic (see my full linux backup guide here).
Here are the commands:
pip install msgpack-python # not sure if the above is needed... the command below might do it. pip install Attic
Pretty stinkin easy.