Removing SystemD from Ubuntu 15

Summary Not everyone wants their server to be managed by SystemD. The reasons why range from being too different to not being a mature enough solution. I don’t mind running it, but if you are one of those individuals that wish not to use it, Ubuntu allows you to boot into Upstart or, if you […]

Managing Multiple SSH RSA Keys

Overview It’s not difficult to argue that using RSA key pairs rather than passwords is more secure when using SSH. Where it can get complicated is when you’re dealing with infrastructure on different networks, such as having one on your local LAN and another in the cloud. For security or political reasons, you may want […]

Deploying a Puppet Master Server on CentOS 6

Learn how to deploy a Puppet Master server on CentOS 6.X using the free open-source release, and automate system configuration management in your infrastructure.

Resetting the Root Password in CentOS and Red Hat

Overview It happens to the best of us. The root password for a particular server isn’t known, there are no other admin accounts available, and you need immediate access to the server. ┬áIt may have been the result of a previous employee not documenting it or maybe it was lost. Either way, it needs to […]

Troubleshooting SELinux Issues on CentOS and Red Hat

Learn how to work with SELinux instead of disabling it and creating an insecure server. Use SETroubleshoot to identify why something is being blocked.

Installing Red Hat Enterprise Linux 7

Red Hat Enterprise Linux 7 brings a lot of much needed change to the operating system, including its installation process.

Use a CentOS DVD/ISO as a Yum Repository

Not every server is connected to the Internet and sometimes you need a local repository to install from. Learn how to install packages from an ISO by using it as a Yum repository.

Change the Hostname of a CentOS Server

Learn how simple it is to change the hostname of a CentOS server, either temporarily or permanently. And understand why someone would want a temporary change.

Using Logical Volume Snapshots in CentOS 6

Logical volume snapshots allow you to make system changes that can be easily rolled back, if needed. Learn how to use them in your CentOS or Red Hat environment.


© 2014 Shane Rainville