Step-by-step ROS 1 Melodic Ubuntu 18.04 Installation Easy Guide

Getting Started

4. 4. Inizializing

   And to Initialize Rosedep Tool
   This Utility is Required by some Core Components and possibly it make easy to Search for Dependencies on Source Compilation builds.
   To Setup it fire:

   sudo rosdep init

   Again to Update it:

   rosdep update

5. 5. Setting Up Path

   Finally, to Set Up Environment Variables
   So modify the User’s Bash configuration with:

   echo "source /opt/ros/melodic/setup.bash" >> ~/.bashrc

   To Reload it simply:

   bash

6. 6. Installing Rosinstall

   Moreover, to Install Rosinstall CLI Tool
   This is a Commonly Used Command Line Utility to Manage ROS Packages Builds:

   sudo apt install python-rosinstall python-rosinstall-generator python-wstool build-essential

7. 7. ROS Getting-Started Guide

   Getting-Started with ROS on Ubuntu GNU/Linux

   ROS QuickStart Tutorial

   Getting-Started with ROS on Ubuntu Tutorial

So Now I’m truly Happy if My Guide could Help you to Quickstart with ROS in Ubuntu 18.04!