Many developers and programmers choose to use a Linux system as their work environment because of its stability, speed, and ease of use. To get started with programming Java, or to simply run Java applications or applets on Linux, you will need to install the appropriate Java software package. Although this is pretty easy to do, the instructions will vary depending on a user’s Linux distribution, what version of Java they wish to use, and whether they need the JDK (Java Development Kit) or just the JRE (Java Runtime Environment).
Programming & Scripting
How to Use a Bash Script to Run Your Python Scripts
Python is a popular programming language used in a wide range of applications, from data analysis and scientific computing to web development and artificial intelligence. Bash is a powerful scripting language used primarily in Unix and Linux environments for automating tasks and running commands. By combining the two languages, developers can create powerful scripts that can automate complex tasks and workflows. In this article, we’ll explore various techniques for running Python scripts with bash, including passing arguments, activating virtual environments, and running scripts in the background. We’ll also provide examples of real-world scripts that demonstrate these techniques in action.
Bash script to test hard drive transfer speed
The Linux operating system gives us many ways to measure the performance of our computer, including individual components such as the hard drive. There are multiple tools for the job, and it is also possible to use built in tools and create our own test to measure real results. In this tutorial, we will see how to use a Bash script to test the transfer speed of a hard drive on a Linux system. We will also learn about some other tools which can supplement our Bash script and give us and give us additional data points when it comes to the transfer speed of our hard drive, including read and write speed.
Nested Loops in Bash Scripts
Nested loops in bash scripting are an essential tool for automation and efficiency when working with complex data structures, such as arrays and lists. By nesting one loop inside another, it’s possible to iterate through multiple levels of data with a single script, reducing the need for manual intervention and improving overall productivity. In this article, we will explore the basics of nested loops in bash scripts, including how to use them for various purposes, common errors to avoid, and advanced techniques for optimizing their performance. Whether you’re a beginner or an experienced bash scripter, this guide will help you master the art of nested loops and take your scripting skills to the next level.
Handling User Input in Bash Scripts
Bash scripting is a powerful tool that can automate various tasks on a Unix-like system. One crucial aspect of Bash scripting is handling user input. Accepting, validating, and processing user input is an essential part of creating robust and reliable Bash scripts. In this article, we will discuss various methods and best practices for handling user input in Bash scripts.
How to improve and debug your shell scripts with ShellCheck
ShellCheck is a free and open source static analysis tool which can be used to check and improve shell scripts. It is able to highlight both common and edge-case errors, and suggest the appropriate fixes. ShellCheck can be used as an online or system utility, but can also be integrated as a linter in various text editors.
List of Python Escape sequence characters with examples
When programming in Python, escape characters can be used in order to tell the compiler that it should treat the next character or characters differently. For example, we can tell Python to print a quote " as an actual quote character, rather than interpreting it to be part of the Python code. Other special characters like \t can create TAB spaces, and \n can create new lines. In this tutorial, you will see a list of Python escape sequence characters and examples that you can use on a Linux system.
How to extend the Thunar file manager with custom actions
Thunar is the file manager included in Xfce, a free and open source Desktop Environment which implements the traditional desktop metaphor, and has become the favorite of many users which switched to it when the GNOME project introduced the GNOME shell. Thunar is light on resources but doesn’t lack functionalities which can be extended further by creating custom actions.
How to use bash array in a shell script
In this tutorial we will see how to use bash arrays and perform fundamental operations on them. Bash, the Bourne Again Shell, it’s the default shell on practically all major Linux distributions: it is really powerful and can be also considered as a programming language, although not as sophisticated or feature-reach as Python or other “proper” languages. Furthermore, Bash scripting is a must-have skill for any Linux system administration job.
Exit code 127 error status in Bash script
Are you receiving a exit code 127 error when trying to execute a Bash script? In this tutorial, we’ll explain what causes this “command not found” error and show you how to fix it.
Set and Get environmental shell variable using c++
Environment variables in the Bash shell can be accessed or set using a C++ program. This is facilitated by the getnenv() and putenv() functions defined in the C/C++ stdlib.h library. Environmental variable expansion is a great feature of a Linux shell as it enables programmers and users to rely on the environment settings of each user separately. C++ getenv() will read all exported environmental variables and putenv() will set existing or create new variables.
How to integrate dialog boxes in shell scripts with Whiptail
The ability to create secure shell scripts is essential not only for system administrators, but also for users who wants to automate repetitive tasks. Sometimes, from our shell scripts, we need to provide the user with some kind of information, ask him/her to provide some input, choose from a set of alternatives, or just ask for his/her confirmation before performing a potentially dangerous operation. All those actions, can be performed from the command line, of course, but to make our scripts more user-friendly, we can use of Whiptail to customize and display textual widgets.