How to solve install-instance-manager returned error code 255 error

Description The following error code occurs when enable the 3CX Instance Management: install-instance-manager returned error code 255 How to solve switch to root user and input following command: wget -O – https://downloads-global.3cx.com/downloads/misc/debianpatches/9/16/0/5/20200619-os-update.sh | bash After entering the command, you can

How to Setup 3CX Failover with KeepAlived on Debian

What is Keepalived The main goal of this project is to provide simple and robust facilities for loadbalancing and high-availability to Linux system and Linux based infrastructures. high-availability is achieved by VRRP protocol. VRRP is a fundamental brick for router failover. In