Unix/Linux date command is a command used for displaying the system’s date and time. In addition, the command can also be used to modify or set the system’s date and time. For one to change the operating system’s time and date, one must be logged in as the root user. In this guide, we examine […]
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Linux rsync Command Examples
Rsync, short for remote sync, is a Linux command used for copying and synchronizing files, between 2 Linux systems. It works in such a way that any additional changes made to a file or directory are replicated on another Linux system. With Linux rsync command, you can seamlessly copy and synchronize backups locally and remotely […]
Java SPI (Service Provider Interface) and ServiceLoader
Java SPI (Service Provider Interface) is the mechanism to load services dynamically. We can implement Java SPI in our application by following the specific set of rules and load the services using the ServiceLoader class. Java SPI Components There are four components in the SPI implementation. Service Provider Interface: An interface or abstract class that […]
java.util Package in Java
The java.util package is part of java.base module. This package contains the most important APIs and classes in Java. Contents of java.util Package Java util package contains the following classes and APIs: Collections Framework Concurrent Classes Functional Interfaces Regex Classes Stream API ZIP API Internationalization Support Classes Service Loader Properties API Random Number Generation API […]
TinyLog – Lightweight Java Logging Framework Tutorial
TinyLog is a simple and lightweight logging framework for Java. We can use tinylog with Java, Kotlin, Scala, and Android applications. Benefits of TinyLog Logging Framework Avoids boiler-plate code of Logger initialization. The Logger class in tinylog is static and used directly to log messages. Support for other popular JVM languages such as Kotlin and […]
Java synchronized Keyword, Synchronized Method and Block
Java synchronized keyword is used in multithreading to create a code block that can be executed by only one thread at a time. Why do we need Synchronization? When we have multiple threads working on a shared entity, the end result might be corrupt. Let’s say we have a simple program to increase the counter […]
Arrays in C
Why do we need Arrays? Consider the problem of storing 10 integers. The naive way to store these integers would be to create 10 different integers variables and store 1 integer in each of them. This would be a viable solution but manipulating these variables would be a task in itself and we would have […]
Linux Environment Variables
Introduction An Environment is an area that contains information about how various programs and applications behave. Linux Environment Variables are used by the applications to get information about the environment. The Environment is configured every time a new shell session is created. Changing the Linux Environment Variables helps the user to control how they interact […]
Linux chmod Command Examples
In this guide, you will learn about the chmod command. Linux chmod command is one of the most commonly used commands especially by system administrators when assigning modifying file and folder permissions. It’s usually used when installing and configuring various services and features in a Linux system. The command is usually used together with a […]
Linux chown Command Examples
Once in a while, you will be faced with the prospect of changing permissions of files and folders. Linux chown command enables you to modify file and directory permissions as you deem fit. This comes in handy, especially when configuring features and services. Let’s see how the command can be used. Linux chown Command Syntax […]