Yubico udev rule

69-yubikey.rules

ACTION!="add|change", GOTO="yubico_end"

# Udev rules for letting the console user access the Yubikey USB
# device node, needed for challenge/response to work correctly.

# Yubico Yubikey II
ATTRS{idVendor}=="1050", ATTRS{idProduct}=="0010|0110|0111", \
    ENV{ID_SECURITY_TOKEN}="1", RUN+="/usr/bin/killall -9 scdaemon"

LABEL="yubico_end"

etc-profile.d-gpg-agent.sh

#!/bin/sh

envfile="${HOME}/.gnupg/gpg-agent.env"
if test -f "$envfile" && kill -0 $(grep GPG_AGENT_INFO "$envfile" | cut -d: -f 2) 2>/dev/null; then
    eval "$(cat "$envfile")"
else
    eval "$(gpg-agent --daemon --write-env-file "$envfile")"
fi
export GPG_AGENT_INFO  # the env file does not contain the export statement