Learn to Code. Shape Your Future
Knowing how to compare strings in Python is a must if you want to be a Python programmer. In this guide you will learn: First of all, Python compares strings character by character. Characters in the same position are read from both strings and compared. This is done behind the scenes by Python using the … Read more
I’m writing a Python program and when I execute it I see the KeyError message. How can I fix it? The KeyError exception is an error that many programmers see when they start using Python dictionaries. The following points are important to understand this error: What does KeyError mean? A KeyError is a way for … Read more
Yes, you can use Python as a scripting language. Using Python you can write scripts to automate very simple tasks with just a few lines of code. At the same time considering Python just a scripting language is not accurate considering that you can use Python to create complex programs of any kind (web applications, … Read more
Enumerate is a Python built-in function that not all developers know about. It can be quite useful to simplify the way your programs are written and to avoid using indexes or counters with iterable objects. And avoid possible bugs! Before looking at how enumerate() works we will have a look at Python loops written in … Read more
Search for a video on YouTube using Python. The program you will write can be used for any search.
The Bash sleep command delays the execution of the command after it for a given amount of time. The sleep time is expressed in seconds. The use of the sleep command is common when scheduling a task every X seconds or when a script relies on another script to complete its execution. These are three … Read more
What is YUM? Yum is the main tool used on the Red Hat Enterprise Linux distribution to manage software packages. It’s not only used on Red Hat but also on CentOs and Fedora. The way it works is consistent across those Linux distributions, so this tutorial won’t refer specifically to any of the three distributions. … Read more
Why groups are important in Linux and how can you add a user to a group or remove a user from a group? Linux is a multi-user system, it allows to give access to its resources (e.g. files and directories…) to multiple users. Different users can have a different level of access to resources, at … Read more
The chmod command modifies the permissions of a file or directory on a Linux system. The three numbers after the chmod command represent the permissions assigned to user owner, group owner and others. The numbers 755 assign read-write-execute permissions to the user ower and read-execute permissions to group owner and others. In this article I … Read more
Do you want to download files via the command line on a Linux system? With cURL you can do that. I will show you how to download files with curl, but let’s start from the basics first. More generally, you can use curl to transfer data from or to a server. It supports a long … Read more