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exFAT (Extended File Allocation Table) is a proprietary Microsoft file system optimized for flash memory devices such as SD cards and USB flash drives. It was designed to replace the old 32bit FAT32 file system that cannot store files larger than 4 GB. This tutorial explains how to enable exFAT support on CentOS 7.

Whether you are troubleshooting network connectivity issues or configuring a firewall one of the first things to check is what ports are actually opened on your system. This article describes several approaches to find out what ports are opened to the outside on your system.

The kernel is the core component of an operating system. It manages the system's resources and it is a bridge between your computer's hardware and software.

After more than two years of development, the new Debian stable version, Debian 10 codenamed Buster, was released on July 6, 2019, and it will be supported for 5 years. This release comes with a lot of new packages and major software upgrades. Debian 10 buster ships with Linux 4.19 LTS kernel, uses the nftables framework as the default iptables backend, supports UEFI Secure Boot and has AppArmor enabled by default.

In Linux, a group is a collection of users. The main purpose of the groups is to define a set of privileges like read, write, or execute permission for a given resource that can be shared among the users within the group. Users can be added to an existing group to utilize the privileges it grants. This tutorial explains how to show all groups a user is a member of. We will also explain how to list all members of a group.

OpenCV (Open Source Computer Vision Library) is an open source computer vision library and has bindings for C++, Python, and Java. It is used for a very wide range of applications including medical image analysis, stitching street view images, surveillance video, detecting and recognizing faces, tracking moving objects, extracting 3D models and much more.

On Linux and Unix operating systems, all new files are created with a default set of permissions. The umask utility allows you to view or to set the file mode creation mask, which determines the permissions bits for newly created files or directories.

Less is a command line utility that displays the contents of a file or a command output, one page at a time. It is similar to more, but has more advanced features and allows you to navigate both forward and backward through the file.

VLC is a free and open source multimedia player. It is cross-platform and can play almost all multimedia files as well as DVDs, Audio CDs, and different streaming protocols.

When administering PostgreSQL database servers, one of the most common tasks you will likely perform is listing the databases and their tables.

When working on the command line quite often you will need to create or edit text files. Two of the most powerful and popular used command line editors are Vim and Emacs. Both of them have a steep learning curve that can be intimidating to new users. For those who need a simple editor, there is nano.

UFW stands for Uncomplicated Firewall, and is a user-friendly frontend for managing iptables (netfilter) firewall rules. It is the default firewall configuration tool for Ubuntu and is also available for other popular Linux distributions such as Debian and Arch Linux.

Usually, to grant sudo access you add the user to the sudo group defined in the sudoers. On Debian, Ubuntu and their derivatives, members of the group `sudo` are granted with sudo privileges while on RedHat based distributions like CentOS and Fedora, the name of the sudo group is `wheel`. This tutorial explains how to configure the sudoers file and allow certain users to run sudo commands without being asked for the password.

Squid is a full-featured caching proxy supporting popular network protocols like HTTP, HTTPS, FTP, and more. Squid is mostly used for improving web server’s performance by caching repeated requests, filtering web traffic and accessing geo-restricted content.

Docker is a containerization platform that allows you to quickly build, test and deploy applications as portable, self-sufficient containers that can virtually run everywhere. In this tutorial, we will explain how to install Docker on Raspberry Pi and explore the basic Docker concepts and commands.

Tr is a command line utility in Linux and Unix systems that translates, deletes and squeezes characters from the standard input and writes the result to the standard output. The tr command is usually used in combination with other commands through piping and can perform operations like removing repeated characters, converting uppercase to lowercase, and basic character replacing and removing. In this tutorial, we will show you how to use the tr command through practical examples and detailed explanations of the most common options.

Network File System (NFS) is a distributed file system protocol that allows you to share remote directories over a network. With NFS, you can mount remote directories on your system and work with files on a remote machine as if they were local files.

This tutorial explains how to install GCC compiler on CentOS 7. We will show you how to install the distro stable version and the newer version of GCC available from the SCL repository.

This tutorial explains how to show all databases in a MySQL or MariaDB server through the command line.

MySQL Workbench is a cross-platform graphical application for MySQL database administrators and architects. It includes tools for managing databases and users, creating and running SQL queries, configuring servers, taking backups, performing migrations and much more. In this tutorial, we will show you how to install and use MySQL Workbench on Ubuntu 18.04. The same instructions apply for Ubuntu 16.04 and any Ubuntu-based distribution, including Linux Mint, Kubuntu and Elementary OS.