Category: Basics

  • How To Flush DNS Cache on Linux

    How To Flush DNS Cache on Linux

    DNS, short for the Domain Name System protocol, is used on Linux systems in order to retrieve IP addresses associated with names. For example, when you are performing a ping request, it is quite likely that you are using the DNS protocol to retrieve the server IP. In most cases, the DNS requests that you […]

  • How To Find Last Login on Linux

    How To Find Last Login on Linux

    If you are working in a medium to big-sized company, it is quite likely that you are working with many other system administrators. As you are performing your sysadmin tasks, some users may try to connect to your server in order to perform their daily tasks. However, in some cases, you may find that something […]

  • How To List Services on Linux

    How To List Services on Linux

    As a system administrator, you are probably dealing with a lot of services every day. On Linux, services are used for many different purposes. They may be used in order to start a SSH server on your machine or they can perform some operations on a specific hour or day. Whether you are using a […]

  • How To Get Your IP Address on Linux

    How To Get Your IP Address on Linux

    When working on Linux operating systems, knowing how to get your IP address is essential. Getting your IP address is often the first step of most network troubleshooting processes. If you are trying to reach a website but the website is no answering back, it might be because your network adapter is badly configured. Similarly, […]

  • Network Manager on Linux with Examples

    Network Manager on Linux with Examples

    If you are an experienced system administrator, and if you focus on network management, you have probably already heard about the Network Manager. Released in 2004 and developed by Red Hat, the Network Manager is a set of different tools, mostly interfaces, designed to facilitate network management on your system. If you want to turn […]

  • How To List Users and Groups on Linux

    How To List Users and Groups on Linux

    On Linux, as a system administrator, you often want to have a complete list of all the users and all the groups on your host. It is quite crucial for security purposes to make sure that you have the correct amount of users and that you didn’t forget to delete some. There are several ways […]

  • Screen Command on Linux Explained

    Screen Command on Linux Explained

    The screen command is a very common command used on Linux to launch and arrange multiple terminal shells within one single shell. Screen is most of the time used for two purposes. It can either be used in order to organize multiple shells and navigate between them easily. It can also be used in order […]

  • Find Files and Directories on Linux Easily

    Find Files and Directories on Linux Easily

    This tutorial focuses on how to find files on Linux using the find and the locate command. As a system administrator, it is a very common task to look for a specific file on your file system. However, it might be sometimes hard to find files on a Linux filesystem especially if you have dozens […]

  • Working Remotely with Linux Systems

    Working Remotely with Linux Systems

    As a Linux system administrator, you are responsible for many machines that may be located locally or on distant sites. In some cases, you will need to connect to them in order to fix an issue with disk space for example. If you are working with users, some of them may get stuck in an […]

  • Find Text in Files on Linux using grep

    Find Text in Files on Linux using grep

    This tutorial focuses on finding text in files using the grep command and regular expressions. When working on a Linux system, finding text in files is a very common task done by system administrators every day. You may want to search for specific lines in a log file in order to troubleshoot servers issues. In […]