1. Good knowledge of shell script.

2. Good knowledge of Linux server security.

3  Should have exposure to WAF / IpTables

4. Experience of Live Migration tasks like hosting and mailing.

5. Exposure on LVM

6. Exposure on DNS Management and troubleshooting.

7. Configuration skill of SSL certificates on different web/mailing servers.

8. Experience in Load balancing of Apache / Nginx / Tomcat web server.

9. Configuration of web servers Apache / Tomcat / Nginx

10. Configuration & migration of Databases like Mysql, MongoDB, Postgresql

11. Configuring storage ISCSI/ NFS / CIFS

12. Troubleshooting skills on WordPress / Laravel / Magento / Angular / Nodejs

13. Exposure on virtualization technology VMWare / XEN / KVM

14. Experience of mail servers that runs postfix , sendmail , qmail

15. Syslog & Log management