Fixing broken YUM on CentOS

Server power outages could cause several problems and one of them is braking YUM manager. When the server is going down while YUM processing (even in background) repo task you will probably face a problem (a very messy situation with yum failure).

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Exim vulnerability – How to fix

A critical severity vulnerability present in multiple versions of the Exim mail software makes it possible for root access by attackers and executing commands on mail servers for some non-default server configurations.

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Checking server disks performance in CentOS 7

Disk benchmarking is the process of running software that accurately measures transfer speeds under various disk access scenarios (sequential, random 4K, deep queue depth, etc.). The aim is to produce figures in MBps that summarize the speed characteristics of a disk.

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Managing BIND DNS Server

Berkeley Internet Name Domain (BIND) is one of most popular server-side software. Domain Name System (DNS) is a must for most servers today. It was developed in the 1980s at the University of Berkley that’s why it has ‘B’=’Berkeley’ in acronym. Currently it active in version 9.

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Installing ImageMagick on CentOS7

ImageMagick is a free and open-source server side software to manage graphics (creating, editing images). It typically utilized from the command-line and available for wide list of platforms. We basically use MagickCore (C), MagickWand (C), MagickWand for PHP (PHP), IMagick (PHP), PythonMagick (Python). With a corresponding language interface setup we may use ImageMagick with easy.

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Installing FFMPEG in CentOS7

FFMPEG is a leading solution to record, convert and stream audio and video files in Linux. We often use FFMPEG as a library in PHP or Python. In this step by step article we will know how to install and configure FFmpeg on CentOS 7 as it not as simple as ‘yum install *’.

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Netwatch overview

Netwatch allows detailed traffic monitoring of your CentOS system. It shows the total speed at which data transfer is happening for each connection from local system to remote systems. To check the transfer speed from an interface, we can use the following command.

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Top commands to monitor CentOS 7 server

Monitoring of your CentOS installation is one of key tasks for every system administrator. They should know how to maintain their VPS systems, dedicated servers to avoid any issues. Below we will discuss top commands to monitor CentOS.

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GUI network tools in CentOS 6

While working in CentOS 7 we feel ourselves comfortable with ‘nmtui’ – a killer tool which provides a text interface to configure networking by controlling NetworkManager (in GUI interface).

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