Using OpenSSL to verify SSL/TLS connections

openssl

OpenSSL is a general-purpose cryptography library and full-featured toolkit for the Transport Layer Security (TLS) and Secure Sockets Layer (SSL) protocols. It’s licensed under the Apache License 2.0, meaning that you are free to get and use it for both commercial and non-commercial purposes, subject to a few simple license conditions. Using OpenSSL to check […]

Bounce Rate vs Exit Rate

Bounce Rate vs Exit Rate

The Bounce Rate vs Exit Rate question is one of the most common questions our customers ask us and there seems to be sometimes some confusion between these. Bounce Rate and Exit Rate are metrics used in digital analytics and web traffic analysis. Are most used as success indicators, but their meaning is sometimes misunderstood, […]

Install docker & docker-compose on Oracle Linux 8

docker

By default on the new Enterprise Linux distributions, docker engine has been replaced by podman, a docker compliant engine. In order to install docker and docker-compose, you can follow this simple tutorial. Install Docker Engine To install docker engine we’ll add first the docker repository: And now we can proceed to install docker: And we […]

How to mount a VHD disk image file

qemu

Sometimes you may need to mount a VHD disk image file in order to inspect its contents or even recover specific files. On Linux you can use the QEMU Disk Network Block Device Server utility – qemu-nbd – to access disk images in different formats as if they were block devices. First, you may want […]

How To: Create a SSH Key

ssh key

In this tutorial we will explain how you create a SSH Key pair and how to use this key to authenticate on remote devices. SSH, that stands for Secure Shell, is a network protocol used to establish an encrypted connection between two devices. The SSH protocol supports either the use of a username and password […]

How to solve ‘DB_RUNRECOVERY: Fatal error, run database recovery’ in CentOS

db error

While rolling out updates on some servers, and without apparent reason, as yum hadn’t failed or thrown any errors before, it failed with DB_RUNRECOVERY: Fatal error, run database recovery: YUM is failing and not accepting any command. While the reason for my YUM database corruption isn’t known, the solution is quite simple and easy to […]

CentOS 7 – Install And Configure ClamAV

clamav

Clam AntiVirus (commonly ClamAV) is a free, cross-platform and open-source antivirus software toolkit able to detect many types of malicious software, including viruses. One of its main uses is on mail servers as a server-side email virus scanner. Despite the myth, Linux operative systems do get troubled with Virus. They can take down your website, […]