How to Install Nagios Server 4.4.9 on CentOS 8

Nagios Core is free and open source widely used monitoring tool which can be used for monitoring Linux servers, Windows servers, Network devices and other applications. Nagios provides alerting services (SMS, Email etc.) for abnormal utilization and issues for Attributes CPU load, Memory usage, Disk usage, Logged in users, Running processes etc. and Services HTTP, FTP, SSH, SMTP, POP3, SNMP etc. Nagios Core packages are not available in CentOS 8 base repository and it can be installed using EPEL repository.

How to Install XRDP Remote Desktop on CentOS 9 Stream

XRDP is an Open-Source Remote Desktop Protocol Server, which is allowing users to take remote desktop of Linux Operating System from RDP clients. XRDP uses RSA Public Key and Private Key encryption to transfer data over the network.

How to install EPEL repository on CentOS 9 Stream

The EPEL repository is an additional package repository that provides useful software packages that are not included in the official CentOS 9 repositories and easy access to install packages for commonly used software.

How to Install KSH (Korn Shell) Shell on CentOS 9 Stream

KSH (Korn Shell)is a shell programming language, which is upward compatible with “sh” (the Bourne Shell). KSH was developed by David Korn at Bell Labs in 1980s. KSH is quite popular is loved by sysadmins to automate everyday tasks on Unix like operating systems. You can install ksh on CentOS 9 using its AppStream repository.

How to Install Gnome GUI on CentOS 9 Using DNF Group Install

CentOS 9 and many Linux distributions have options to install minimal, GUI and others and minimal installation restrict resource utilization. However, if minimal installation done while installation and GUI can be installed later.

How to Install PostgreSQL 10 Database on CentOS 8

PostgreSQL is a free and open-source object-relational database management system (ORDBMS) and is available for various platforms, including Linux, Microsoft Windows, and more. Relational database management systems are a key component of many websites and applications. They provide a structured way to store, organize, and access information. Its binary packages are available in CentOS 8 AppStream repository.

How to Recover Corrupt RPM Database on CentOS 8

Sometime rpm database corrupt message displays during working with RPM or YUM/DNF as shown in below screen. So, rpm database rebuilding requires to work further with RPM or YUM/DNF.

How to Add a Service in Firewall Configuration on CentOS 8 (firewall-cmd)

Firewall is a network security tool that provide network level security based on a set of rules. It has controls on incoming and outgoing traffic.