Allocating swap space to a vanilla ubuntu server on Azure or AWS.
By default, you will have zero swap. Possibly resulting is unknown app/memory related crashes. Add a bit of swap for a buffer!
fallocate -l 1G /swapfile;chmod 600 /swapfile;mkswap /swapfile;swapon /swapfile;echo "/swapfile swap swap defaults 0 0" >> /etc/fstab;swapon --show;free -h;