Jeff Wilson 
Systemd is a popular init system that serves as a management tool for various systems within the Linux operating environment. Through systemd, we can perform essential administrative and maintenance functions, like managing system resources, controlling startup options, logging, and journaling. At the same time, systemctl is a command used to manage systemd services, which are currently standard on Linux.
The Linux command line interface offers complete control over your Linux system. Although many Linux commands may seem scary or confusing initially, learning the most basic yet powerful and useful commands can make your server management significantly more manageable. This cheat sheet is designed to simplify your journey through Linux, providing a comprehensive reference to the most essential commands. Whether managing files, monitoring system performance, or configuring network settings, having these commands at your fingertips will enhance efficiency and productivity. We’ll share some of the most commonly used and valuable tips in our Linux commands cheat sheet. To begin with, we’ll break them down into easy-to-navigate sections. Let’s get into it.
Sudo (superuser do) is a command utility allowing trusted users to run commands as root. It is necessary to run a program requiring root access. Only certain users in the sudo/wheel group can do it. If an unauthorized user attempts to run a command, sudo will notify the administrator via email. By default, this warning notification is saved to the root account. Any user running the command will be prompted for a password. Once authenticated, sudo will create a timestamp for that user. From then on, the user can execute commands for five minutes. Once five minutes have passed, the user will be prompted for a password. If you need to overwrite this grace period, you can do so by changing the settings in the /etc/sudoers file. In this article, we will show you how to add user to sudoers in Debian 12 in a step-by-step guide.
In this tutorial, we will explain the Linux SED command using some real examples. SED (Stream Editor) is one of the most used Linux commands in scripts and command lines. It searches, replaces, inserts, and deletes strings. The most common use for the SED command is to find and replace a string in a file without opening it, saving time. System administrators regularly use this command while writing scripts and automating tasks on the server.
In the next paragraphs, we will teach you everything you need to know about the SED command. Let’s get started!
You may have heard of xmlrpc.php and people touting it as a big security loophole in WordPress. Does it pose a serious threat, and if so, how can we prevent it? This tutorial explains what xmlrpc.php is, its advantages and disadvantages for your WordPress site, its uses, and whether you should disable it. Let’s get right into it.
Relational database management systems are a key component of many websites and applications. They provide a structured way to store data and access information in a structured way. PostgreSQL is a relational database management system (RDBMS) that implements the SQL query language. It is a popular choice for many small and large projects because it has many advanced features, such as reliable transactions and concurrency without read locks. This article will show how to manage PostgreSQL from the command line, commonly referred to as PSQL connect to database.
A package manager is a tool that monitors the software installed on your computer, facilitating the installation of new applications, upgrading existing software to more recent versions, or removing previously installed programs. As the name indicates, a package manager manages packages, which are groups of files packaged together for installation and removal as a single entity. Logically, a Debian package manager executes this function on the Debian interface.
It offers a user interface that aids individuals in overseeing the assortment of packages installed on their system. In summary, this procedure is referred to as Package Management. Furthermore, Debian package files generally carry the .deb extension.
Managing a server is certainly not an easy job, especially for beginners. If you are busy managing various technical matters manually, then cron jobs are an excellent solution. Cron jobs are a feature in Linux OS that can help you automate the tasks on a server easily. In this article, we invite you to learn what a crond or cron daemon is, what cronjob is, its basic commands, and how to use crontab.