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Hibernate @WhereJoinTable Annotation 1. Overview Using an Object Relational Mapping tool, like Hibernate, makes it easy to read our data into objects, but can make forming our queries difficult with complex data models. The many-to-many relationship is always challenging, but it can be more challenging when we wish to acquire related… Continue Reading hibernate-wherejointable
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How Long a Linux Process Has Been Running Linux 1. Overview Linux comes with a handful of monitoring tools which can help us to get some insight about the OS itself. The ps utility from the Procps package is one of those tools which can report some stats about the current processes in… Continue Reading linux-process-running-time
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Linux Commands – Repeat a Command n Times Linux 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… Continue Reading linux-repeat-command
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Generating SSH Keys in Linux 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… Continue Reading linux-generating-ssh-keys
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Execute a Command in Multiple Directories on Linux Linux 1. Introduction In this tutorial, we’ll explore a few Bash approaches to execute the same command in multiple directories. 2. A Closer Look First of all, let’s break down the goal into smaller steps: list the contents of the current folder… Continue Reading linux-execute-command-directories
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Append Lines to a File in Linux 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… Continue Reading linux-file-append-lines
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Getting the Absolute Directory of a File in Linux Linux 1. Introduction In this tutorial, we will see how to get the absolute directory of a given file using two common Linux file system tools. 2. Prerequisites Unfortunately, there currently isn’t a single command to obtain the absolute directory of… Continue Reading linux-absolute-directory-of-file
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Adding a Path to the Linux PATH Variable Linux 1. Overview In this quick tutorial, we’ll focus on how to add a path to the Unix PATH variable. 2. PATH Variable The PATH variable is an environment variable that contains an ordered list of paths that Unix will search for… Continue Reading linux-path-variable
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Concatenating Text Files into a Single File in Linux Linux 1. Overview Linux provides us commands to perform various operations on files. One such activity is the concatenation – or merging – of files. In this quick tutorial, we’ll see how to concatenate files into a single file. 2. Introducing… Continue Reading linux-concatenate-files
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