What is chroot jail and How to Use it?


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.

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RPKI Explained – Secure BGP Routing


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

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TLS vs SSL: What’s the Difference?


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.

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How To Use The Modprobe Command In Linux


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.

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How To Use The Passwd Command In Linux


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.

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How VMware Tenants Apply the Fortanix Encryption Policy


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.

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What is Umask and How to Use It


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.

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How to Install OpenVPN on CentOS 7 or 8


In this tutorial, you will learn how to set up OpenVPN on a CentOS 7 server and how to connect to OpenVPN from a client machine. Establish a secure connection to a company network, bypass geo-restrictions, and allow you to surf the web using public…

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How to Build Linux Kernel From Scratch {Step-By-Step Guide}


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 However, they are usually outdated.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.

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How to Fix the SSH “Connection Refused” Error


Fix SSH connection refused by troubleshooting some of the common causes for this problem. Take a look of all the reasons for connection refused error and how to fix the problem.

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