Shell & Scripting

The shell is the command-line interface used to interact with a Linux system, while scripting is the practice of combining shell commands into reusable files called scripts. For network engineers, shell scripting helps automate repetitive tasks such as backing up device configurations, parsing log files, running diagnostic checks across multiple devices, and generating reports. Bash is the most common shell used in networking environments, and even basic scripting knowledge can significantly reduce manual work and human error. Python is equally important and has become the dominant programming language in network engineering. Compared to Bash, Python is better suited for complex automation tasks and serves as the foundation for many modern network automation tools and frameworks, including Ansible and API-based network management.