Setting Yubikey
From D3xt3r01.tk
What
Getting and compiling PAM support for your yubicokey !
Getting
git clone https://github.com/Yubico/yubikey-personalization.git ~/yubico-personalization
git clone https://github.com/Yubico/yubico-c.git ~/yubico-c
git clone https://github.com/Yubico/yubico-pam.git ~/yubico-pam
Compiling
cd ~/yubico-c autoreconf --install ./configure make && make install
cd ~/yubico-personalization autoreconf --install ./configure make && make install
cd ~/yubico-pam autoreconf --install ./configure make && make install