Openssl is a handy and simple command line tool for generating a certificate signing request (CSR). All Linux systems administrator should know how to do this. Below are the steps you will need to go through before you can create…
Security 401.6 – Linux Security On the last day of the bootcamp we get the privilege to go through Linux Security. Day 6 also happens to be a shorter day as some students choose to leave early that day to…
Task: Check to see if a particular error message occurs in /var/log/messages and email the contents of the error message every 5 minutes Lets first break down the task into three parts: 1. Extract contents from the log file for…
Recently I migrated my blog over to Bluehost as Godaddy was going to rip me off for $250+ per year on renewal. The migration was simple as I have a Linux background. Their C-Panel was quite standard as well. Anyways…
The Challenge So you’re at work and your corporate firewall restricts all outgoing traffic except for http/https (port 80/443) and you want to remote desktop to your PC at home. What can you do? The simple solution is to use…
Here’s the RHCSA Exam Cheat Sheet Part 3 EX200 Cheat sheet part 3: Service Management The service resides under /etc/init.d start a service at boot chkconfig service on or chkconfig –level135 service on list a service chkconfig –list GUI tool…
Cheat Sheet Part 2 Here’s the RHCSA EX200 cheat sheet part 2. Enjoy: Software Management To search a package yum search package-name To display info of a package yum info package-name To install a package yum install package-name To remove…
Back in the day Back in the day when I did my RHCE exam on on Enterprise Linux 4, the RHCSA was a certification that would be granted if you only passed the first part of the RHCE exam but…
Take a copy of the subversion repository In order to migrate a subversion repository you must NOT do a plain copy of the database. You must do a DUMP of the repository. svnadmin dump path/to/repository > repository.dump Restore your repository…
First Install mysqltuner In order to tune mysql database that is running wordpress you must first download and install “mysqltuner”. On my CentOS 5.8 server simply run yum to install it. yum install mysqltuner Run mysqltuner to analyze your database…