Linux

How to create a CSR using openssl

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…


SANS – SEC401 Security Essentials Day – 6

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…





RHCSA Exam EX200 Cheat Sheet Part 3

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…


RHCSA Exam EX200 Cheat Sheet Part 2

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…


RHCSA Exam EX200 Cheat Sheet Part 1

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…


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How to migrate a subversion repository

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…


How to tune mysql database running wordpress

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…