WordPress Error: Briefly unavailable for scheduled maintenance. Check back in a minute.

This error can be annoying but the fix is pretty easy.  This usually occurs when you kick off an update of a plugin or theme and navigate away from the update progress page before the update completes. To fix this and get your site working again navigate to the root directory of your website and look for a .maintenance file… then delete it. I’ll briefly walk through doing this via an FTP client or over SSH Read more…

High Sierra issues with Chrome or Firefox

This is a short post to address the High Sierra issues with Chrome or Firefox when rendering the applications. Symptoms Google chrome runs slow, freezes Firefox runs slow or freeze Other applications run slow or freeze Mouse cursor freezes routinely during normal system operation System Info: Operating system: High Sierra 10.13.1 Hardware: MacBook Pro Retina (Late 2013) Chrome version: 62.0.3202.89 (Official Build) (64-bit) Firefox version: 56.0 (64-bit) Monitors: 2 x 27 inch DELL P2715Q 4K My Read more…

Create self-signed TLS certificates – PKCS8 key and x509 cert (works for Graylog 2 Gelf)

  This is an overview of a simple way to create a self signed TLS key pair.  Particularly how to create the TLS files and convert the key file to the PKCS8 format. What is TLS (Transport Layer Security)? According to the definition on wikipedia, Transport Layer Security (TLS) and its predecessor, Secure Sockets Layer (SSL), both frequently referred to as “SSL”, are cryptographic protocols that provide communications security over a computer network. The connection Read more…

Build LXC Linux Container Server on Vagrant VM and Fabric

LXC Linux container host server LXC Linux containers is kind of a weird thing to say because LXC means Linux Container, so I’m saying Linux container Linux container… but I digress. LXC has been my goto container solution for the past couple of years. I used OpenVZ containers for a while, but after having several major OS crashes that required a full rebuild of my CentOS server , I decided to explore LXC a bit more Read more…

Docker monitoring dashboard: caAdvisor, Grafana and influxdb

So you want to see stats of your running containers yeah? This is a short ‘to the point’ post about spinning up a set of docker containers to create a Docker monitoring dashboard.  @dalekurt started this docker-compose.yml file based on a great post by Brian Christner and I made some changes to make things work as I expect. Docker compose is awesome and ever since I started using it I stopped running docker run …, I create Read more…

How to Run 10 nested VMs in one EC2 VM (Linux containers vs hypervisors)

  In a world of scalable distributed infrastructures and systems, there is a great need for cost effective virtual development environments to build and test these scalable applications.  This is a short post to debunk a common misconception about running virtual machines within Amazon’s EC2 environment. Yes,it it possible to run multiple virtual machines within a single EC2 virtual machine (instance).…you just need to know the right technology to use and why. In this post Read more…

CentOS – One Liner Installation: OpenVZ kernel and Web Panel

One line install (for the impatient): curl -s -L http://goo.gl/sqKjXF|sudo bash … grab a coffee, it will take about 10 minutes and will automatically reboot the server in the process. Now go through the description below to understand what you just ran.  Yeah it’a ass-backwords but, it’s pretty cool. View on Github: https://github.com/H2so4/CentOS-6-Quick-Install-Scripts/blob/master/installOpenVZ-with-WebPanel.sh Overview The following script installs OpenVZ kernel and OpenVZ Web Pannel on a fresh CentOS server.  This script is a modified version of Read more…

Bypass sysprep limit in Windows 2008 server

 The need to bundle an instance varies however there is a limit to how many times a Windows instance can be bundled.  This is a sysprep limit set to cap the number of times a machine can be syspreped (if that’s a word) I found an awesome post that fixes this issue on the Windows side which makes it possible to bypass the limit set in windows by making a registry change:Set the following registry key to Read more…