- sudo bash -c 'cd /etc/openvpn; for f in client/* server/*; do ln -sf $f .; done'
- sudo bash -c 'cd /etc/openvpn; for f in server/*.key client/*.key; do chmod 600 $f; done'
+ sudo bash -c 'shopt -s nullglob; cd /etc/openvpn; for f in client/* server/*; do ln -sf $f .; done'
+ sudo bash -c 'shopt -s nullglob; cd /etc/openvpn; for f in server/*.key client/*.key; do chmod 600 $f; done'