When working with various Linux commands, you may be wondering what version of the command you are using. Of course, the version relates to the binary executable file itself, and traditionally is maintained by the system package manager, which is responsible for checking on updated versions and installing them at the user’s discretion. Commands in Linux typically undergo slow, subtle changes. Some commands have not changed much at all since the 70s, when they were introduced on Unix. Others have new versions developed regularly, and you need to check your version to know which features it has. In this tutorial, you will learn how to check the version of a command on a Linux system.
bash
Bash base64 decode and encode on Linux
Linux commonly uses base64 to encode and decode data. This method of encoding provides a reliable way for data to be transmitted and stored. The encoding process will convert binary data to ASCII characters, making it usable by a variety of services (such as OpenSSL) that require readable ASCII character transmission as opposed to binary. Afterwards, the data can be decoded back to binary data. In this tutorial, you will see how to use the base64
command to decode and encode data on a Linux system.
How to say YES to ALL with cp command
The cp command is used to copy files and directories on a Linux system. If a user tries to copy a file over to a location that already contains the same file name, the default behavior of cp
is to overwrite the destination file with the source file. However, on some Linux systems, this behavior can be configured differently, and the user might see a prompt to confirm overwriting in their terminal. When copying many files, this prompt can get repetitive and annoying to deal with. In this tutorial, you will learn how to say YES to ALL with the cp
command when trying to copy files via the Linux command line.
How to say YES to ALL with rm command
The rm command is used to delete files on a Linux system. It can be used to delete a lot of files at once, but you will need to use certain options when trying to delete directories or certain files. In this tutorial, you will learn how to say YES to ALL with the rm
command when trying to delete files via the Linux command line.
Linux shutdown commands explained
New users are often surprised by the number of commands that can be used to shut down a Linux system. Thanks to the flexibility of Linux and its storied history, there is almost always more than one – or more than a few – ways to accomplish the same task. Although Linux is always giving users plenty of choices on how to operate their system, one method usually proves better for certain scenarios, and all come with their pros and cons.
How to kill a process by name
When you need to quickly or forcibly close a running process on a Linux system, many users will try to determine the process ID and then kill a process by its ID. While this works fine, it is sometimes easier or more convenient to kill a process by name. This way, we get to skip the step of looking up the process ID, and let our terminal do the work for us.
How to kill process by ID
Everything that is currently running on your Linux system is a process. Some processes are meant to run in the background (application updates, for example), so you may not be readily aware of their existence. And other processes (a web browser, for example) are very apparent, and get started or stopped by the user on a constant basis. All of these processes are assigned an ID number, called PID or “Process ID”, and can be referenced in various situations, including killing a running process via the process ID.
How to join line on Linux
When working with text on the command line, it is sometimes useful to join multiple lines together. Rather than going through text files and manually shifting lines around to be on the same line, our Linux system provides us with multiple tools to simplify this task for us. Log files are a good example of text that is usually split up onto multiple lines, and sometimes it is easier to visualize the data when some lines are joined together. In this tutorial, we will show you several ways to join lines of a file together on a Linux system.
How to check what shell I’m using on Linux
The shell on a Linux system is the layer that interprets the commands being executed by the user, and translates them into a language that the operating system can understand. The Bash shell is the default one in Linux, and typically what all users become familiar with first. But there are a lot of other shells that can be used, too; like sh, zsh, ksh, csh, and tcsh, to name a few.
How to quit telnet
The telnet utility, a once common protocol that graced the terminal of every system administrator and power user, was a precursor for the SSH protocol. Since telnet sends all data, including usernames and passwords, over the network in clear text, it is not often used anymore. Despite the other protocols that have come to replace it, telnet remains an ideal utility to test the connection to a certain port of a device, and can be handy in other niche scenarios, or even send an email.
How to pipe output to a file on Linux
When using the Bash shell on a Linux system, we can send the output of a command to somewhere else, by passing it to another command or a file, for example. This is called Bash shell redirection. It is useful in many different scenarios, and is one of the most basic and essential components of learning to use the Bash shell and Bash 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.