Technologies & Products:
bigdata(hadoop,sqoop,cloudera etc)
cloud(AWS, openstack, google cloud, oracle cloud)
Virtualization(Vmware, Hyper-V, Citrix,virtuzzo)
Mailing(zimbra, postfix, qmail)
Monitoring(cacti, nagios, nagios, zenoss)
Webserver(apache, IIS, Nginx etc)
Database(Mysql, mongo, cassandra, postgre)
hosting panel(cpanel, plesk, zpanel etc)