We’ll be diving straight into the core concepts and components that will help you become proficient in Ansible. This tutorial assumes that you have already installed Ansible on your system and have a basic understanding of what Ansible is.

Setting Up the Environment#

SSH Key Generation#

If you haven’t already, generate an SSH key pair on your Ansible control node.

ssh-keygen -t rsa

SSH Key Distribution#

Copy the SSH public key to all your target nodes.

Using pdftotext:#

1. Installation:

   • If it’s not installed, you’ll need to install the poppler-utils package which includes pdftotext.

   sudo apt install poppler-utils

   or

   yum install poppler-utils

   depending on your distribution.

2. Usage:

   • Once installed, you can convert a PDF to text and then count the words as follows:

   pdftotext input.pdf - | wc -w

   Here, input.pdf is your source PDF file, and wc -w counts the number of words. The - in pdftotext specifies that the output should be sent to stdout, which is then piped into wc.

Psql is a command-line interface for interacting with PostgreSQL, a powerful and open source relational database system. Brew is a package manager for macOS that makes it easy to install and manage software. Here are the steps to install psql with brew:

• First, install the brew package manager if you don’t have it already. You can do this by running the following command in your terminal:

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

• Second, update brew by running the following commands:

brew doctor
brew update

• Third, install libpq by running the command:

brew install libpq

Libpq is a library that contains psql and other PostgreSQL client utilities.