Yum is a package manager that is used on a number of Linux systems, notably Red Hat / CentOS and derivatives like Asterisk At Home / TrixBox, in order to ease the installation and update of software packages.

If your systems uses yum, you can install QueueMetrics from scratch using the following commands:

wget https://yum.loway.ch/loway.repo -O /etc/yum.repos.d/loway.repo
yum install queuemetrics

And then following the on-screen instructions in order to create the database. The first line is needed in order to add Loway Research as one of the authorized repositories into which yum can search for packages.

To update QueueMetrics to the latest version, just use:

yum update queuemetrics

And then have a look at the Updating.txt file in order to modify the database and/or the configuration.properties file if so is needed.

As an alternative, you may want to delete it and reinstall it from scratch, as:

yum erase queuemetrics
yum install queuemetrics