i will minting in Peercoin but i need to keep the application up or I can close the application for the staking?
(Sorry for my English)
It needs to be up and "unlocked for minting only". A synced client should not take up many resources.
Okay I will use my Raspberry Pi for this ^^But there a version GUI of peerunity?
why not try peerbox? it is designed to securely mint peercoins on your raspberry piwww.peerbox.me
Okay... with peerbox, we must download the Blockchain?
you can even get 20 PPC with it if you run a full node
Okay, but I already download the blockchain, there is a .conf file? for -dbcache=xxxx
yes in ~/.ppcoin/ppcoin.conf