Install fonts for Linux 2026.2 OP prerequisite

In a previous release, we moved from Oracle Jdk 1.8.0_144 to Open JDK 1.8.0_212. Several fonts that Oracle supported are no longer available. These missing fonts will cause certain qTest features to not work properly, such as the Excel export functions.

As a prerequisite for installing qTest OnPremises for Linux deployment, install fontconfig on your Manager server. Fontconfig is a library that provides a list of available fonts to applications, as well as configurations to render fonts. These instructions provide the missing fonts for qTest functions.

Ubuntu

To install fontconfig for Ubuntu, follow these steps:

Check if fontconfig is already installed with the following command.
```
fc-list		
```
If it is not install, use the following command to install it.
```
sudo apt-get install fontconfig		
```

RHEL

To install fontconfig for RHEL, follow these steps:

Check if fontconfig is already installed with the following command.
```
fc-list		
```
If it is not install, use the following command to install it.
```
sudo yum install fontconfig	
```