Step of Upgrading Zabbix from 1.8 to 2.0

1. Download latest source from www.zabbix.com
2. Installation Manual for 2.0 http://www.zabbix.com/documentation/2.0/manual/installation/install#from_the_sources
3. service zabbix-server stop
4. service zabbix-agentd stop
5. tar xvf zabbix-2.0.3.tar.gz
6. cd zabbix-2.0.3
8. ./configure --enable-server --enable-agent --with-mysql --with-net-snmp --with-libcurl --with-libxml2 --bindir=/usr/bin --sbindir=/usr/sbin --sysconfdir=/etc/zabbix
9. make install
10. cd upgrades/dbpatches/2.0/mysql
11. ./upgrade <your database name>
12. cp /usr/local/sbin/zabbix* /sbin
13. cd frontends
14. cp php /var/www/html/ -R
15. cd /var/www/html
16. mv zabbix zabbix185
17. mv php zabbix
18. chown apache.apache zabbix -R
19. service zabbix-server start
20. service zabbix-agentd start
21. http://<servername>/zabbix to run the setup and finish