You can check whether a file or directory exists on a Linux system using the test command. See our examples below to find out how. The test Command Syntax test EXPRESSION The test command will evaluate the EXPRESSION. Expressions can be built using the following operators and can be… Read More »How to Check if a File or Directory Exists in Bash [+ Examples]
Here’s a summary of the options available for connecting to your Raspberry Pi via SSH – from Linux, macOS, and Windows. Networking We’ll assume you have your Pi on your network – wired or wirelessly. Static IP Address vs DHCP Your Raspberry Pi will most… Read More »How to SSH Into Your Raspberry Pi Remotely [Simple Guide]
cURL is a package that contains various tools for transferring data between remote servers. It supports FTP, Windows Shares, Mail Servers, and of course Web Servers using HTTP. Downloading a file from the Linux shell is usually accomplished using the cURL command like so: curl http://example.org/file.zip –output… Read More »Making POST Requests with cURL
This tutorial explains how to use the cd command in Linux to change the directory you are currently in, within the shell. We’ve previously covered how to look around in directories with ls. But now you need to start navigating around the directories. We’ll do… Read More »Linux cd Command: Change Directory
With the Linux chmod command, we can recursively change file permissions on all files and directories. This guide explains how. It’s likely you’ve run into the following errors before: 111 [Permission Denied] “Linux-Screw” [Permission Denied] “Linux-Screw” [readonly] For any system files, using sudo is the… Read More »Linux chmod Recursive: How to Change File Permissions Recursively
This tutorial explains how to use the Linux passwd command to change a user password or disable an account. You’re assigned a ticket: A simple password reset, but it’s for a Linux machine. What do you need to know to reset a password on Linux?… Read More »Linux Change User Password (passwd)
The ls command in Linux is likely one of the first commands you ever need to use. In this article, we’ll go over the command and commonly used parameters. My preferred set of options is as follows: ls -Zaltrh Let’s dig into each option individually,… Read More »ls Command in Linux to List Files and Directories
Whether you’re developing Python apps on Linux, or just organizing your files from the shell, it’s important to be able to find out which folder you are currently navigating. The pwd command will do that for you – it prints the name of the current directory you… Read More »Using the ‘pwd’ Command in Linux, with Examples
In this guide, we explain how to use systemctl to list services and check on their status. We will also cover some of the other uses for systemctl. Coming from run_init service, systemctl is a breath of fresh air. I’m sure there are many reasons… Read More »Systemctl: How to List Services (Status, Control, and Tips)
There are numerous methods that can be utilized to kill a process in Linux. This tutorial will teach you how to find and kill broken processes. A process can become orphaned easily. Whether on purpose or not, a parent process can crash and leave a… Read More »How to Kill a Process in Linux