How do I install MetaDefender Core in Rocky Linux 9

When you first install MetaDefender Core on Rocky Linux 9 and successfully complete the installation, some engines may fail to install after activation due to missing dependency packages, as shown below:

The screenshot shows that the Extract Archive Engine failed to install due to missing libraries: libgdiplus and libnsl. (these dependency packages are requested)

You can install them using the following command:

curl https://download.mono-project.com/repo/centos7-stable.repo | tee /etc/yum.repos.d/mono-centos7-stable.repo

yum install -y epel-release

yum install -y libgdiplus --nobest

yum install libnsl -y

Libnsl is also a dependency for Deep CDR and other engines. After installing the library, the output should match the screenshot below:

Besides that, the Deep CDR engine requires additional dependency packages (libgomp, ncurses-compat-libs), which can be installed using the command below:

yum install libgomp -y

yum install ncurses-compat-libs -y

The output should be as the image below:

Next, you need to disable and then re-enable the Archive Engine to prompt MetaDefender Core to reinstall it. After doing this, the Archive Engine should install successfully.