How to fix: user is not in the sudoers file error

How to fix: user not in sudoers file error

The purpose of this tutorial is to show how to fix the RHEL7 User Not In Sudoers File Error on all major Linux distributions. When trying to execute Linux commands with root privileges via the sudo command, you will receive an error message if the current user is not in the sudoers file. This is a security feature on Linux systems to stop ordinary users from esclating their commands to administrator privileges.

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How to remove repository using Flatpak

How to remove repository using Flatpak

Flatpak uses remote repositories (usually just called “remotes”) in order to search for and download software. If at any point you decide that you no longer wish to download applications that come from a particular repository, you can always remove it from Flatpak. This will prevent Flatpak from querying the specified repo for future software searches and updates.

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How to List all flatpak repositories

How to List all flatpak repositories

Just like traditional package managers, Flatpak relies on software repositories in order to download applications. Repositories are a necessary component of Flatpak as they allow users to install applications and dependencies from a central location. A repository contains a catalog of installable software and will provide future updates to the packages as needed.

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How to update Flatpak application

How to update Flatpak application

Applications that have been installed via Flatpak, just like those from other sources, will occasionally need to be updated. The Flatpak service can be used to keep your installed applications up to date. In this tutorial, you will see how to update all your Flatpak applications either individually or all at once on a Linux system.

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How to manager power profiles over dbus with power-profiles-daemon on linux

How to manage power profiles over D-Bus with power-profiles-daemon on Linux

Power-profiles-daemons is a free and open source project designed to handle system power profiles over D-Bus. The two major Linux desktop environment, GNOME and KDE Plasma, are nicely integrated with it, allowing the user to easily manage power profiles from their dedicated power manager interfaces, but it is also possible to switch profiles and retrieve information about them from the command line, using a dedicated utility.

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Mounting an NTFS partition on a Linux system

How to mount partition with ntfs file system and read write access

NTFS stands for New Technology File System and is developed by Microsoft for use on their Windows operating systems. NTFS is not normally used on Linux systems, but has been the default file system on Windows for many years. Linux users are probably used to seeing drives with the ext4 file system, which is ordinarily the default and certainly the most widespread in the Linux realm.

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Managing system firewall on Red Hat Enterprise Linux

Redhat Disable Firewall – start, stop, enable, disable

firewalld is the default firewall on Red Hat Enterprise Linux, and it’s enabled by default, but it’s possible to disable the firewall on Redhat, and you’ll also see how to check firewall status in Linux. Normally, there should not be a need to disable the firewall, but it may be quite handy for testing purposes or other scenarios. In this tutorial, you’ll see how to check the status of firewalld, enable or disable the service from starting automatically upon system boot, and how to stop or start the firewalld service in RHEL.

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Ubuntu 20.04: Connect to wifi from command line with Netplan

Ubuntu Server 20.04: Connect to WiFi from command line

In this tutorial, you will learn how to connect to WiFi from command line on Ubuntu using Netplan. While this method can be used on Ubuntu desktop systems with a GUI, it is especially useful if you’re running a headless Ubuntu 20.04 system like a Raspberry Pi or need to connect to Wifi on Ubuntu Server. Follow along with us below as we connect to a WiFi on command line via SSID and network key.

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Basic Linux Commands

Basic Linux Commands

Linux beginners may get overwhelmed by the sheer number of commands that are available in the terminal, but most users will find themselves executing the same few commands over and over. If you are looking to get started with the Linux command line, we have listed 20 of the most important and basic commands that you should know. These basic commands are the most essential to learn, and also the ones you will likley find yourself using the most.

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