apt-key adv --keyserver subkeys.pgp.net --recv-key E58FE9B3FE3B0470525159BD6DC3D600CDEF74BB
apt-get install dirmngr
This issue may be caused by a buggy package installation script causing incorrect repositories to be added to the software sources repository list. If after troubleshooting the issue remains unresolved contact your vendors by opening a support ticket with the error details.
Other error message:
gpg: failed to start the dirmngr ‘/usr/bin/dirmngr’: No such file or directory
The defautl vm.swappiness value for Proxmox 5.2.x is 60
Run this command in Shell in order to reduce swappiness to an absolute necessity when the system is out of RAM.
sysctl -w vm.swappiness=0
Other performance tips
Proxmox OpenVZ SWAP and Performance
When trying to setup a meteor up node on proxmox CT the console will give out this error.
failed to register layer: ApplyLayer exit status 1 stdout: stderr: permission denied
This is because a container is being created within a container.
The soluton is to create a VM instead of a CT.
Configure your instance using this guide to install the necessary packages and setup VNC to start on reboot.
Tip: You will want to connect via SSH tunnel to your VNC server. That is the safest way to do it.
Specify the resolution using this format
vncserver :1 -geometry 1600x1200