Fedora 22では、gpgはgpg-agentを見つけられません。
% gpg-agent --daemon
% gpg -vvv --use-agent --no-tty --decrypt file.gpg
gpg: using character set `utf-8'
:pubkey enc packet: version 3, algo 1, keyid 3060B8F7271AFBAF
data: [4094 bits]
gpg: public key is 271AFBAF
gpg: using subkey 271AFBAF instead of primary key 50EA64D5
gpg: using subkey 271AFBAF instead of primary key 50EA64D5
gpg: gpg-agent is not available in this session
gpg: Sorry, no terminal at all requested - can't get input