Deepak Prasad

step-by-step guide to install GCC on Rocky Linux. We also went further and wrote a C program to add two numbers, and further looked at how GCC carries out compilation

Multiple methods and commands to test port connectivity between Linux server and client with examples. Check availability of multiple ports in Linux for firewalls or network issues.

Step by step instructions in the tutorial to install and use metasploit framework on kali Linux

SQL injection proves to be a critical vulnerability that can exist in a system. The DVWA acts as a reliable resource for both penetration testers who want to improve their skills and web developers who want to develop …

John The Ripper (JTR) is one of the most popular password cracking tools available in most Penetration testing Linux distributions like Kali Linux, Parrot OS, etc

Step by Step instructions to install and setup Kali Linux on Raspberry Pi 2,3 and 4 with screenshots.

Kali Linux repositories are found in the /etc/apt/sources.list file. There are 3 different branch i.e. Kali-rolling branch, Kali-last snapshot branch, Kali- experimental branch

Jinja2 is a very popular and powerful Python-based template engine. Jinja2 templates is widely used in Ansible playbook to access variables, configuration etc

To configure ansible we need certain pre-requisites. For example control node cannot be a windows node, We need SSH access on the managed node and python3 must be installed

Step by Step instructions to install iredmail on rocky linux 8 with screenshots. Install and Configure iredmail server GUI

In this tutorial I will share multiple methods and commands to check Kubernetes Cluster Version in a Kubernetes Cluster.

Add timestamp to SSHD DEBUG logs using while loop. Prepend timestamp to STDOUT and log file for DEBUG logs

There are two methods to add label to running pod in Kubernetes. Using kubectl label pods or kubectl edit command to edit a resource object.

Step by step instructions to install wireguard VPN on Rocky Linux. Configure network, firewall and test the VPN

Step by step instructions to install graylog on rocky Linux 8. Install and configure elasticsearch, mariadb, java and graylog server

Defensive programming can be tough to write source code, but it results in high- quality foolproof code

In this tutorial, we will learn how to install MariaDB on Rocky Linux 8.4. You may also check the mariadb page link for the official instructions to install

git rebase is used to integrate changes from one branch into another. rebase takes a series of commits (normally a branch) and replays them on top of another commit (normally the last commit in another branch). The …

Game development might sound as simple as creating a video game. But have you ever thought about what it looks like

Prevent ping flood attack in Linux using iptables and firewalld for both IPv4 and IPv6. Apply hash limit to ICMP Echo request to control ping flood in Linux and Unix servers.

Add a label to node. Remove a label from node. Use kubectl label node to add or remove a label from worker or controller nodes in Kubernetes Cluster

Learn to implement password policy with complexity, old password reuse and more using pwquality.conf explained with examples in RHEL/CentOS 7 Linux

Step by step instructions to configure ansible on RHEL/CentOS 8. Since ansible is agentless we don't need any configuration on managed nodes.

How to use ansible without installing python3 on managed nodes. Can we use ansible without python? How to use raw module in Ansible?

We can also use password instead of passphrase to connect with controller to managed nodes using --ask-pass. By default ansible will not prompt for any password.

Ansible facts is a term used for system information of the managed nodes. By default ansible playbook will gather facts from the managed nodes using setup module

YAML uses indentation (like Python), which builds the relationship of items with one another and In Ansible, nearly every YAML file starts with a list.

Ansible loop is used to iterate over multiple tasks in playbook. It supersedes with_items in Ansible with later version as with_* are deprecated

We can use Ansible import module to add playbook, tasks from another file into a different playbook. This can help use the same set of tasks across multiple playbook and save space

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