Java
Installing Oracle Java on Ubuntu 14.04 LTS
You will need to run the following as the root user. To install Java 7… …and for Java 8… You will have to agree and accept the following licenses: You can quickly test both java […]
Linux
Saving and Restoring iptables
It’s good practice to backup iptables before making any changes. And if you need to restore, you can use either…. …or…
CentOS 6
Protect Your Cloud Infrastructure Servers with Isolated Cloud Networks
Create a Private Cloud Network Create an isolated cloud network. Here I am using the supernova client to communicate with the Rackspace OpenStack API. Take note of the id – you’ll need it shortly! Create […]
Cloud
Using the Rackspace Nova Client
List your Cloud Servers You can list all your servers by simply using the nova client’s list sub-command. Nova Help The nova client comes with a help subcommand. You can find out more about how […]
WordPress
WordPress Plugins for Code Snippets
If you’re looking to insert snippets of code into your WordPress site, you might find that the <code> and <pre> tags don’t quite cut the mustard. You could mess around with the CSS and stylise […]
CentOS 7
Install and Configure fail2ban on CentOS 7
To install fail2ban on CentOS/RHEL 7, you first need to make sure you have the EPEL repository enabled. Then you can simply install it with yum as usual. Configure fail2ban You will need to create […]
CentOS 7
Repodata is over 2 weeks old
In Red Hat 7 / CentOS 7, you may need to clear your repository cache if you see the below message when using yum. Repodata is over 2 weeks old. Install yum-cron? Or run: yum […]
CentOS 7
Securing an SSH Server
Nobody likes to log into their server and see this! Over 31,00 failed root login attempts in just a few days!! Disable Root Logins By default (on my system atleast), root logins are enabled. Before […]
Linux
First Attempt at Searching for Failed SSH Logins
Nobody likes to log into their server to see there have been over 31,00 failed login attempts in a few days!! [andy@bashful ~]$ ssh [email protected] Last failed login: Sun Feb 8 16:31:28 UTC 2015 from […]
Java
Using HelloWorld to Test a JDK Installation
To test that your Java Development Kit (JDK) is installed correctly, you need to write a simple Java program, compile it, and run the compiled bytecode. A simple Java HelloWorld example looks like this. You […]