Help

http://www.programmerinterview.com/index.php/database-sql/parameterized-queries-vs-prepared-statements/

https://www.digitalocean.com/community/tutorials/7-security-measures-to-protect-your-servers

https://www.digitalocean.com/community/tutorials

http://www.datadisk.co.uk/html_docs/

https://www.theguardian.com/technology/askjack/2016/nov/24/how-can-i-protect-myself-from-government-snoopers

https://www.technovelty.org/linux/