Security

A chroot jail is created when a system's root folder is changed to once chosen by a user.
This tutorial covers possible uses for a chroot jail and how you can set one up.

RPKI makes BGP more secure and reliable. Learn about the flaws of BGP, what RPKI is and how it works.

TLS and SSL protocols serve to encrypt the data exchanged between a user and a web server.
This tutorial will show you how they work, what makes them different, and which one you should ultimately use.

The Linux kernel is extensible and uses modules (drivers) to make the communication between hardware and software run smoothly. Learn how to add and remove official modules using the modprobe command.

Passwords are the most important feature of security. This article explains and shows examples of how to use the passwd command in Linux to manage passwords for accounts.

The Fortanix Key Management Service (KMS) provides enhanced privacy compliance in multi-tenant cloud environments. Learn how to expose the policy as a service provider, and apply it as a tenant on PhoenixNAP's Data Security Cloud.

The umask command on Linux lets you interact with your system's default permissions and fine-tune permissions for new files and folders.
This tutorial shows you what umask is, how it works, and how best to use it.

All Linux distributions come with a predefined kernel. However, they are usually outdated. Follow this step-by-step guide to learn how to build a Linux kernel from scratch.

Ubuntu 16.04 EOL is coming up on April, 2021. This Linux distribution will no longer be supported with updates and patches, so make sure you upgrade or mitigate your systems on time.

Learn how to make curl ignore certificate errors by adding the required option to the command. Ignoring certificate errors, should only be practiced for development purposes. Skip checking for SSL certificates only if needed.