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    Securing SSH Server – sshd_config

    by Mitch September 8, 2014, 14:53 0 Comments

    Secure Shell (SSH) is a cryptographic network protocol for secure data communication. SSH is widely used on linux machines for console access and remote management. It is a server – client oriented network protocol which enables a secure communication between two network computers. The port on which SSH Server runs by default is 22. If […]

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    Tagged with: centos6, centos7, configure, security, ssh

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    Forward & Reverse Apache Proxy – CentOS 7

    by Mitch August 28, 2014, 14:30 21 Comments

    There are two possible configurations for Apache Proxy Server and we will present installation and configuration of both types this how to. Forward Apache Proxy is a proxy configuration that is commonly used in companies and it enables users to access the internet. Users or clients must configure their browsers or operating system to use a proxy server (Forward Apache […]

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    Tagged with: apache, centos6, centos7, configure

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    Increase Root Partition Size – LVM – CentOS

    by Mitch August 22, 2014, 10:18 12 Comments

    Since i have been getting alot of questions on how to increase root partition size on a linux system i decided (finally!) to write a how to about this topic. Linux root partition is different from all other partitions on your system since it holds all of the system files required for your system to run […]

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    Tagged with: centos6, centos7, filesystem, lvm

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    Install Nagios on CentOS 7

    by Mitch August 13, 2014, 12:35 7 Comments

    So CentOS 7 is out and there are quite some differences from it’s predecessor CentOS 6. This is why i decided to write a new how to installing Nagios Core 4.0.8 on the latest fully updated CentOS 7 minimal installation – Install Nagios on CentOS 7. The Firewalld and SELinux are both enabled and running in […]

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    Tagged with: centos7, install, nagios

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    SSL Library Error: error:0906D06C:PEM

    by Mitch August 8, 2014, 11:04 3 Comments

    Recently i was migrating an Apache HTTP Server (httpd) server from one linux machine to another. The problem was, that on the source linux machine Apache HTTP Server (httpd) was a custom compiled 2.4.4 and we were having constant problems when patching the linux machine (openssl libraries etc.). So we decided to replace the custom compiled Apache HTTP Server (httpd) with […]

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    Tagged with: centos6, centos7, debug, error

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    Error: bad top line in state file – logrotate.status

    by Mitch August 7, 2014, 07:41 3 Comments

    A while ago i noticed that /var partition on a certain server was almost filled up to a 100% up and started researching what caused this. I noticed that log files in /var/log directory were not rotating. I decided to run the log rotation manually when i got this error “error: bad top line in […]

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    Tagged with: centos6, centos7, debug, error, logrotate

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    Install CentOS 7 – CentOS 7 is Here!

    by Mitch July 28, 2014, 12:52 1 Comment

    We all know CentOS – Community Enterprise Operating System as a linux distribution aiming at enterprise class community-supported computing platform. CentOS aims to be 100% compatible with it’s upstream source Red Hat Enterprise Linux (RHEL). CentOS 7 was released on 7 th of July 2014 (RHEL 7 on 10th of June 2014) and its brings some major differences from it’s […]

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    Tagged with: centos7, install

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    Install Zenoss Monitoring Server on CentOS 6

    by Mitch July 9, 2014, 10:05 10 Comments

    Zenoss is a free and open source monitoring solution similar to Nagios. It can be used to monitor all sorts of hardware and in case of failures sends out alerts to recipients. Zenoss Core provides a web interface that allows system administrators to monitor availability, inventory/configuration, performance, and events. Compared to Nagios (my personal opinion) Zenoss has alot higher […]

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    Tagged with: centos6, install, zenoss

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    Install PostgreSQL 9.3 on CentOS 6

    by Mitch June 27, 2014, 12:13 5 Comments

    PostgreSQL is a database server. It is an object-relational database management system and it’s main purpose is to store data. PostgreSQL calls itself “The world’s most advanced open-source database”. It is a fact that MySQL and PostgreSQL are two most popular open-source relation database management systems (RDMS). It is up to you to choose the one you […]

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    Tagged with: centos6, database, install, postgresql

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    Install OwnCloud on CentOS 6

    by Mitch June 18, 2014, 13:30 3 Comments

    OwnCloud is a free and open-source software which enables you to create a private “file-hosting” cloud. OwnCloud is similar to DropBox service with the diference of being free to download and install on your private server. Advantage of OwnCloud over DropBox is that it is private (you manage it yourself) and not limited (only limited by hard disk […]

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    Tagged with: centos6, install, owncloud

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    Manage Users and Groups on Linux

    by Mitch May 27, 2014, 13:22 2 Comments

    If you are a linux system administrator one of the more important things to learn and to know is how to manage users and groups on linux systems. This guide will describe how to add, delete and modify users and groups (manage users and groups) on CentOS 6 linux (same applies to other linux distributions) […]

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    Tagged with: centos6, centos7, configure, group, user

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    Build Apache 2.4.9 RPM on CentOS 6

    by Mitch April 30, 2014, 17:48 13 Comments

    We all know Apache HTTP Server. Apache is de-facto web server on UNIX-like systems and is maintained by an  open community of developers of the Apache Software Foundation. Apache HTTP Server is released under the Apache License and is an open-source software. The problem with Apache HTTP Server on CentOS and other RHEL based distros is, […]

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    Tagged with: apache, build, centos6, rpm

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