Articles

Detailed articles with no missing parts! Divided into three main categories, Microsoft products, Linux – CentOS and Networking, they explain key moments, discuss case studies and contain step-by-step guidelines

Exchange 2016 Back Pressure Troubleshooting

In most cases, first time people realize this feature ever exists is when the senders receive this error, and mail delivery becomes slow or stops at all: 452 4.3.1 Insufficient system resources. A reboot will temporarily solve the problem, but you definitely don’t want to do this. So, what is the Back Pressure, and how solve this problem? Read on

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Rsyslog and LogAnalyzer installation how-to

I want to collect all the logs from all the systems and network devices to one service, browse them and get reports and statistics. That is why I’ve implemented Rsyslog – maybe the most common tool for collecting logs. Plus, it can be set up to write all gathered logs to MySQL Database – and LogAnalyzer will take them from it and give them a comfortable and nice interface

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CentOS 7 Spacewalk kickstart

Spacewalk is an open source Linux systems management solution rich with different functions, that include installing and upgrading software, OS, making security check and more. In the last post, dedicated to Spacewalk, we will describe the process of setting up Spacewalk Kickstart, or remote installation over the network. For this purpose, it is bound with Cobbler – a Linux installation server that allows for rapid setup of network installation environments.

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CentOS 7 Spacewalk Features

Spacewalk is an open source Linux systems management solution rich with different functions, that include installing and upgrading software, OS, making security check and more. There are Spacewalk features that we can set up and use: remote commands, manage errata and make security scans, deploy files and monitor software crashes

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CentOS 7 How to install and register clients with Spacewalk

Spacewalk is an open source Linux systems management solution rich with different functions, that include installing and upgrading software, OS, making security check and more. In the previous articles we have learned hot to install Spacewalk and set up repositories. So the server job is done, now it is time to add some clients to manage

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CentOS 7 How to configure channels in Spacewalk

Spacewalk is an open source Linux systems management solution rich with different functions, that include installing and upgrading software, OS, making security check and more. But the basis for most functions are configured channels, so let’s find out, how to configure channels in Spacewalk.

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CentOS 7 How to install Spacewalk

I needed something like WSUS for CentOS, and Spacewalk provides that ability – patch management. But soon I’ve realized that gained so much more! In these articles we will talk about the most interesting features of this system. But to start using this system – at first, we must install it

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CentOS 7 DHCP Full configuration guide

In our CentOS 7 DHCP Full configuration guide we will cover basic and more complicated setup, configure failover and dynamic dns updates with PowerDNS, dig in troubleshooting and monitoring and use some additional utilities

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CentOS 7 PowerDNS installation guide

PowerDNS shows high performance and is distributed under the GPL license. It is the only solution, that stores zones in different backends like MySQL, PostgreSQL, LDAP and others. In addition, the PowerDNS Authoritative Server is the leading DNSSEC implementation.

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Juniper SRX Dynamic VPN Guide

Dynamic VPN is Juniper’s clientless solution for remote access IPSEC VPN. Here you can find full solution for this case plus essential troubleshooting and log gathering information

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