One of the most commonly used commands in Linux is the cat command. Short for concatenate, Linux cat command allows users to perform the following operations. View contents of a file Redirect output of files Create files and input content In this tutorial, we take a look at cat command with a few examples of […]
Passwordless SSH Login in 3 Simple Steps
SSH (Secure SHELL) is a secure opensource network protocol that allows users to log in securely to remote Linux systems and other network devices. In addition, the protocol is used for the transfer of files between Linux systems using Secure copy (SCP) protocol. Usually, SSH prompts users for passwords before login. However, you can configure […]
Facts about a VPN You Didn’t Know
More and more people prefer to surf the Internet using VPN services. And this is not surprising at all – they are reliable tools that able to protect personal data on the network. The solutions have much more interesting features. But far from all users are aware of all the magic the VPN does. Let’s […]
Linux gzip Command Examples
Linux offers an array of tools for compressing and decompressing files. In this tutorial, we take a look at the Linux gzip command tool. Gzip is a file format as well as a software application which was created by Mark Adler and Jean-Loup Gailly and has been in use since the early Unix Systems. Linux […]
Linux ifconfig Command Examples
Linux ifconfig is a network management tool that helps you to check the IP addresses of Linux systems as well as configure network interfaces. Let’s dive in and see how this popular command is used. Linux ifconfig command without any options The ifconfig command without any arguments displays the status of all the network interfaces […]
ExamSnap Overview: Top Certifications to Launch Your Career in IT
Without any doubts, the IT industry is one of the highly volatile platforms in the world. But at the same time, it is also among the fastest growing industries. So, qualified professionals are always in great demand. If you are an IT professional, earning a certification marks a huge step towards cementing your status in […]
How to Parse CSV Files in Python
CSV files are used a lot in storing tabular data into a file. We can easily export data from database tables or excel files to CSV files. It’s also easy to read by humans as well as in the program. In this tutorial, we will learn how to parse CSV files in Python. What is […]
Introduction to Linked List (Java implementation)
A linked list is a linear data structure that contains a sequence of elements such that each element has reference to the next element in the sequence. Each element in the linked list is called “Node”. Each Node contains a data element and a Node next which points to the next node in the linked […]
SQL Foreign Key
When a database table is designed an important factor is to make sure that the table is scalable enough and is normalized at the same time. In order to make sure that the tables are well linked and normalized we use SQL foreign keys. SQL Foreign Key A foreign key is defined by a column […]
Linux wc Command – Count of Words, Lines, Characters in a File
Linux wc command is used to count the number of words, lines, and characters in a file. The ‘wc’ stands for Word Count. Linux wc Command Let’s see how the wc command is defined by the man page. The man page can be accessed by typing in the following command. The following will be displayed […]