Solve Proxmox CloudLinux Kernel Care GPG Error

apt-key adv --keyserver subkeys.pgp.net --recv-key E58FE9B3FE3B0470525159BD6DC3D600CDEF74BB
 apt-get install dirmngr

 

UPDATE: 

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

 

References:

https://unix.stackexchange.com/questions/401547/gpg-keyserver-receive-failed-no-dirmngr

https://serverfault.com/questions/337278/debian-how-can-i-securely-get-debian-archive-keyring-so-that-i-can-do-an-apt-g

Proxmox disable swap unless totally out of RAM

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

 

https://forum.proxmox.com/threads/disable-swap-on-host.25623/

https://forum.proxmox.com/threads/proxmox-is-using-swap-with-lot-of-ram-available.41994/

Other performance tips

Proxmox OpenVZ SWAP and Performance

 

Proxmox XFCE4 Setup with Ubuntu + VNC Server

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

 

Credit: https://stackoverflow.com/questions/15816/changing-the-resolution-of-a-vnc-session-in-linux#1083668