Centos 31
A collection of tutorials to manage CentOS and Redhat based systems, including performance tuning, installation, administration, and troubleshooting.
FirewallD Introduction On CentOS 7
What is FirewallD? Firewalld was introduced in CentOS 7/ RHEL 7 with both a GUI and command line interface for making changes. It is a alternative for using IPtables. If offers a zone based firewall configuration that allows you to enable different zones with different levels of trust. Different Zone possibilities Zones change be changed, […]
Recover A Root Password On CentOS
To recover the root password on a linux system if you do not have it have misplaced it depends on the major release of the OS. This guide will cover both CentOS 6(and prior releases) and CentOS 7. Recover a root password on CentOS 6 or older You will need to boot into single user mode. […]
MariaDB 10 Upgrade From MySQL 5.1 on CentOS 6
MariaDB is a fork of MySQL that was created from some of the original developers of mysql after MySQL was purchased by Oracle. Upgrading to MariaDB offers a range of benefits and is a relatively simple upgrade. It has more active development then MySQL currently and is just developed by Oracle support as MySQL is. […]
ModSecurity Installation With Apache On CentOS
ModSecurity is an open source monitoring system for web applications. It has powerful rule sets that allow you to protect applications from attacks. View the project for more details. It provides a ton of features such as: More than 16,000 specific rules, broken out into the following attack categories: * SQL injection * Cross-site Scripting (XSS) […]
mod_auth_token Installation In Apache
mod_auth_token is a apache module that can be used to sign URLs, using this it can create time based urls that expire after a certain amount of time. It will prevent hot linking as the URLs will expire. This is particularly useful with video and image sharing. To get started you will need to have […]
Hot Clone A CentOS Server With Rsync
Hot Clone is the term used to describe to completely clone a Linux server using r-sync across the network. This is useful in situations which you would like to create a clone with little to no downtime that would be typical of taking the original server offline. You can use this to perhaps move a single […]
MySQL Replication Master Slave Setup
MySQL Replication allows you to synchronize slave copies of a MySQL server. You can then use the slave to perform backups and a recovery option if the master should go offline for any reason. MySQL needs to be installed on both servers. Install MySQL on both servers: yum install -y mysql-server mysql-client mysql-devel Edit /etc/my.cnf […]
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