linux - null

virsh console <vm>

To be able to use virsh console to access a vm console directly from a KVM host, a serial port in the vm needs to be configured. Debian/Ubuntu Create a serial port Create file /etc/init/ttyS0.conf with the following content exec

linux

Postscreen

Postscreen is a brilliant piece of software that acts somewhat like a bouncer at the entrance of a nightclub; It helps keeping the trash outside and making sure the processes 'behind the door' have more time and resources to do what they need to

security

Letsencrypt auto renewal

Let’s Encrypt is a free, automated, and open certificate authority (CA), run for the public’s benefit. It is a service provided by the Internet Security Research Group. How to enable the use of Letsencrypt certificates on your site and for TLS support