All modern linux distributions organize software in packages which contain applications binaries, files, metadata and information about the package dependencies, possible conflicts with other packages etc. The core Rhel package manager is called rpm itself, and it is the tool used also by dnf, the higher level package manager, which is capable to manage dependencies. A relatively recent technology , flatpak, let us install also sandboxed applications together with their runtimes.

In this tutorial you will learn:
  • The three main ways to install a package using rpm
  • How to install packages using dnf
  • How to install applications graphically from the gnome-software utility
  • How to install sandboxed applications with flatpak
rpm-manpage
The rpm package manager manual

PHP-mbstring is used by a ton of popular applications, including WordPress. Installing it on RHEL 8 / CentOS 8 isn't as straightforward is it probably should be, but it's definitely not difficult.

The easiest and recommended way to install PHP-mbstring on RHEL 8 / CentoOS 8 is to dnf command and perform the php-mbstring package installation from a standard RHEL 8 / CentoOS repository. You can also install it directly from the Remi repository, which provides tons of other great PHP packages.

In this tutorial you will learn:
  • How to Install PHP-mbstring from the RHEL 8 / CentOS 8 Repository
  • How to Install PHP-mbstring from the Remi Repository

There are many cases in which we may want to set a static IP for a network interface. In RHEL 8 / CentOS 8, the network connections are managed by the NetworkManager daemon, so in this tutorial we see how we can perform such task by editing an interface file directly, by using a command line utility, nmcli, or via a text user interface, nmtui.

In this tutorial you will learn:
  • How to set a static IP address by directly editing an interface file
  • How to set a static IP address using the nmcli utility
  • How to set a static IP address using nmtui
interface-file-edited
The edited network interface file

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