Linux Entropy – Usefull For Your Mail Server

List available entropy If you are not sure, whether you need haveged, run: # cat /proc/sys/kernel/random/entropy_avail This command shows you how much entropy your server has collected. If it is rather low (<1000), you should probably install haveged Resources: https://wiki.archlinux.org/index.php/Haveged https://www.digitalocean.com/community/tutorials/how-to-setup-additional-entropy-for-cloud-servers-using-haveged