How to install the latest stable version of zabbix_agentd automatically. How to get the latest version of zabbix-agentd

install_latest_zabbix.sh

#!/bin/bash

# get latest stable version 
VER=$(curl -s  http://heanet.dl.sourceforge.net/project/zabbix/ZABBIX%20Latest%20Stable/ | grep -P "alt=\"\[DIR\]\" /> <a href=" | grep -v alpha | grep -v beta |  awk -F'[\"]' '{print $6}' |  sed -e "s/\///" |  tail -1 )

eyel "---------------------------------------------------"
eblu Install zabbix-agent version 
egre $VER
eyel "---------------------------------------------------"


if [[ ! "$VER" =~ ^[0-9]*?\.[0-9]*?\.[0-9] ]]
then
  ered "Failed to get the latest stable version of zabbix-agent." 
  exit
fi