added logic to added excluded pkgs from epel

zabbix_agent.sh

@@ -84,9 +84,12 @@ elif [ ${OS} == 'CentOS' ] || [ "${OS}" == "Rocky" ]; then
         dnf install -y zabbix-agent
     fi 
     if [ "${OS_VERSION}" == "9.0" ]; then 
-        # zabbix is suppleied via the EPEL Repo, we need to exlude it from there, this is done manaully right now
-        echo "Please exclude the zabbix packages from the EPEL Repo /etc/yum.repos.d/epel.repo excludepkgs=zabbix*"
-        read -p "Press any key to resume ..."
+        # zabbix is also supplied via the EPEL Repo, we need to exlude it from there
+        if [ $(grep -c "^excludepkgs=" /etc/yum.repos.d/epel.repo) -eq 1 ]; then
+            sed --in-place '/^excludepkgs=/ s/$/ zabbix*/' /etc/yum.repos.d/epel.repo
+        else
+            sed --in-place '/^enabled=1/ s/$/\nexcludepkgs=zabbix*/' /etc/yum.repos.d/epel.repo
+        fi
    		rpm -Uvh https://repo.zabbix.com/zabbix/6.0/rhel/9/x86_64/zabbix-release-6.0-4.el9.noarch.rpm
         dnf clean all
         dnf install -y zabbix-agent