How to Remove Old Kernels in Debian and Ubuntu
After installing a new Linux kernel, old kernels are not automatically deleted. They remain in your disk (/boot partition). You have to delete them manually. Why? The main reason is…
A Simple Guide to Obtain and Install an SSL Certificate
More and more companies use SSL certificates (small data files that digitally bind a cryptographic key) to protect their customers sensitive data, as username, password and credit card number, as…
Upgrade Debian 7 Wheezy to 8 Jessie
One of the advantages of Debian operating system is the ability to live update a production server from current to next release. Under normal circumstances you do not have to…
Debian 8 Jessie Dedicated Web Server Setup Step by Step
Debian 8.0 Jessie was initially released on April 26th, 2015. Jessie is powered by Linux kernel 3.16. Jessie ships with a new default init system, systemd. The sysvinit init system…
Securing web applications with modsecurity on Debian Wheezy
Mod-security is a (third party) module of Apache (recently Microsoft IIS and NGINX) offering intrusion detection and (some kind of) prevention for web applications, acting as a web application firewall.…
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