CLI

What is CLI?

         

CLI, or Command-Line Interface, is an interface that allows users to interact with a computer system by entering specific commands through the keyboard. Compared to a graphical user interface (GUI), the CLI does not rely on graphics but operates through text commands. CLI was widely used in early computer systems, and although GUIs have become common in modern computers, CLI is still widely used for its efficiency and flexibility.

 

What are the Advantages of CLI?

 

Efficiency

You can use the CLI to perform operations on multiple files in a single text command without wasting time finding and clicking each file. If you are familiar with these commands, you can quickly navigate and interact with the system. You can also create scripts to execute multiple commands in the CLI to automate monotonous or repetitive tasks.

  

Remote Access

CLI applications typically use fewer network resources than graphical applications. This makes CLI applications suitable for systems with limited hardware capabilities or remote server environments.

   

Troubleshooting

For developers and system administrators, the use of the command line interface is an extremely valuable skill that encourages a deeper understanding of the underlying system. With the CLI, you can become more proficient with tools and utilities while improving error management.

     

For example, you can use the CLI to view the system log and quickly find comprehensive error messages and debugging information. Text-based commands can also be easily logged. This helps ensure the task is reproducible and makes it easier to troubleshoot the steps in the future.

    

What are the Disadvantages of CLI?

    

Command Accuracy

It is crucial to enter commands accurately to get the desired output. Mismatched commands, missing alphabets, or missing characters may produce unexpected results or trigger errors.

   

Unlimited Commands

As the commands may vary for all operating systems or software. It is anticipated that users may need to become familiar with different types and numbers of commands. This can be difficult to remember and create confusion when using the CLI, making it less efficient.

   

Not Suitable for Beginners

It can be confusing for users who are new to programming. They must take the time to familiarize themselves with the use of the CLI and understand the commands, as opposed to a GUI where the user can click and complete tasks.

         

What are the Use Cases for CLI?

           

Because of the versatility of the command line interface (CLI), it can be used in many use cases. For example, if you are a system administrator, software engineer, data scientist, or technical user, you can use the CLI to gain more control. Some examples are provided below.

         

System Management

System administrators use the CLI to fix system-related problems, check operating system configuration, and change or update configurations on remote computers. They can run command and control systems at scale.

        

Software Development

Software developers often use CLI tools to save time and streamline workflow. For example, they frequently access third-party libraries during their work. If a software developer uses the CLI to add references to these libraries, they can do so with a single insert command rather than having to write instructions to search for the library using the GUI. This approach saves time for developers as well as future users who interact with the system.

      

Cloud Computing

In cloud environments, the CLI is a key element in managing virtual machines, containers, cloud services, and server configurations. Developers and administrators use the CLI to interact with the cloud provider's API to automatically provision resources and deploy applications.

       

Network Management

Network administrators use the CLI to configure routers, switches, firewalls, and other networking devices. If you want to monitor network traffic, troubleshoot connectivity issues, and enforce security policies, CLI tools can help. Penetration testers also use command line tools for vulnerability scanning, network reconnaissance, and incident analysis.