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Splitting Files in Unix Systems 1. Introduction In this short tutorial, we’ll take a look at a few different ways we can split files in Unix systems. All of these commands were tested in Bash, but are platform-independent. 2. Using split One of the most common ways of splitting files… Continue Reading split-files
Append Lines to a File in Linux 1. Introduction In this tutorial, we’re going to explore several ways to append one or more lines to a file in Linux using Bash commands. First, we’ll examine the most common commands like echo, printf, and cat. Second, we’ll take a look at… Continue Reading file-append-lines
Linux Commands – Find Broken Symlinks 1. Overview In this tutorial, we’ll see how to find broken symlinks using the find command in different forms. 2. Symlinks Symlinks, symbolic links, or even soft links are files that point to other links, files, directories, and resources. They are similar to shortcuts… Continue Reading find-broken-symlinks
Copy a File to Multiple Directories on Linux 1. Overview In this tutorial, we’ll learn how to copy a file to multiple directories on Linux. The commands will work on any POSIX shell, including bash. 2. To A Single Directory We can use the cp command to copy files to… Continue Reading copy-file-to-multiple-directories
Java String.trim() The method trim() removes any whitespace at the beginning and at the end of a String. If the String contains only spaces, then the method returns an empty String. Available Signatures [source,java,gutter:,false] public String trim() Example [source,java,gutter:,true] @Test public void whenTrim_thenCorrect() { assertEquals(“foo”, ” foo “.trim()); }
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Find Files That Have Been Modified Recently in Linux 1. Introduction There are various occasions when we want to search for files that have been changed recently. For example, as a system admin, we’re responsible to maintain and configure computer systems. Sometimes, because we’re dealing with a lot of configuration… Continue Reading recently-changed-files
Guide to Unix Swap 1. Introduction In this tutorial, we’ll introduce the Unix swap space, its advantages, and a few simple commands to manage it. 2. The Unix Swap Space Swap or paging space is basically a portion of the hard disk that the operating system can use as an… Continue Reading swap-space
Generating SSH Keys in Linux 1. Overview In this tutorial, we’ll cover the basics of SSH keys and how to generate an SSH key pair in Linux. 2. Secure Shell (SSH) Secure Shell (SSH) is a secure remote login protocol that leverages public-key cryptography to encrypt the communication between a… Continue Reading generating-ssh-keys
Setting Permissions with chown and chmod 1. Overview The Linux operating system is a multi-user operating system. It has a security system in place that controls which users and groups have access to the files and directories in the system. In this short tutorial, we’re going to have a look… Continue Reading chown-chmod-permissions
Linux Commands – Repeat a Command n Times 1. Introduction Repeating a command is one of the most commonly used operations when working with Linux scripting. In this quick tutorial, we’ll present how to perform an operation n times using different approaches. 2. Using a for Loop Let’s start by defining a… Continue Reading repeat-command