linux

black skeleton keys

How to share OpenSSH keys with WSL in Windows 10

Don’t want to copy over your ssh keys from Windows to WSL Linux? Or generate new ones? Then share your Windows OpenSSH key with WSL! The OpenSSH config gives you the option to share keys using an IdentityFile directive. Here is how you can share your keys between Windows 10 and WSL.

WSL Monit website monitoring status

Setting up Monit monitoring in Windows Subsystem for Linux WSL

How to install and configure Monit monitoring in Windows 10 WSL. Set up a Monit monitoring service for your websites and services. A couple of years ago, I wrote a blog article about setting up Monit monitoring on an Ubuntu VM on Hyper-V. Now it’s time to do the same, but then in Windows Subsystem for Linux, or WSL. For this, I use Ubuntu.

Benchmarking WordPress, simple load & speed testing with ApacheBench

Here is how to load test WordPress with ApacheBench. ab is a small benchmark utility that comes with Apache. It’s a really simple HTTP load generating tool, ideal for a simple WordPress load & speed test. How fast does your WordPress site respond? How many HTTP requests per second can your server handle? These are questions on which ab can shed some light.

High Performance MySQL

MySQL InnoDB performance improvement: InnoDB buffer pool instances – Updated!

Are you running into MySQL load problems? Learn how to tune MySQL servers for a heavy InnoDB workload, by configuring innodb_buffer_pool_instances and increasing read/write I/O threads. Dividing the InnoDB buffer pool into multiple instances can improve Disk I/O. By doing so, you run your database more efficiently and faster. Here is a little help for you.

Recursive scp and symlinks

Recursive scp without following symbolic links. When using recursive scp, symbolic links aren’t preserved and are copied as if they are normal directories. So you have to look for another solution to recursively transfer symlinks over ssh. Here is one: Tar over ssh!

Install Varnish Cache on CentOS 6.7

How to install and configure Varnish Cache on CentOS. Varnish is a web application accelerator also known as a caching HTTP reverse proxy. You install it in front of any server that speaks HTTP and configure it to cache the contents. Because Varnish Cache is really, really fast, web applications like WordPress, Drupal and Joomla can greatly benefit from Varnish Cache.

Elasticsearch logo

Install Elasticsearch on CentOS 6.7

Elasticsearch is a highly scalable open-source full-text search and analytics engine. It allows you to store, search, and analyze big volumes of data quickly and in near real time. In this article we’ll go over the steps to install Elasticsearch on CentOS 6.7.

Generate pseudo-random passwords with OpenSSL

OpenSSL comes in handy when you need to generate random passwords, for example for system accounts and services. In this short post I’ll give you a quick example on how to generate random passwords with OpenSSL in Linux (Bash), Windows and PHP…

SSH port forwarding in PuTTY

Tunnel RDP through SSH & PuTTY

How to tunnel Remote Desktop (RDP) over SSH with PuTTY. Have you ever been in a situation where you needed to perform remote administration on a Windows Server, and the RDP port 3389 is blocked on a firewall? Did you know you can tunnel RDP over SSH with PuTTY? This particularly comes in handy when there is no VPN available to the remote network… Here is how to set up a RDP SSH tunnel with PuTTY.

Turn off swap

Not every Linux server I maintain needs to have a swap partition and to start swapping. For instance, the MySQL servers all have more than enough RAM on board to do their work. Yet, when a swap partition is enabled Linux starts swapping, which may degrade MySQL database performance…

HTTPS for WordPress

Redirect HTTP to HTTPS

In this post I provide you various HTTP to HTTPS redirection methods, for Windows Server IIS and Linux Apache. In web.config and .htaccess. Use these examples to your advantage to secure the traffic between your visitors and your website.

MONIT - Barking at daemons. Monit is a small Open Source utility for managing and monitoring Unix systems. Monit conducts automatic maintenance and repair and can execute meaningful causal actions in error situations.

Monit monitoring on Ubuntu 14.04 VM on Hyper-V

In this post you’ll learn about setting up a Monit monitoring service for your websites and services. Monit is a free and open source service monitoring application which can perform various event-based actions. Monit can send email notifications, restart a service or application, or take other responsive actions. We set Monit up on a Ubuntu 14.04 VM, built on Hyper-V. And we use Monit to monitor several websites, and send out notifications on downtime.

How to restore a deleted Open-Xchange context?

How-to restore, or recover, an accidentally deleted OX context. If you’ve accidentally deleted an Open-Xchange context (contextid), then that is bad… Here is how to recover a deleted OX context and filestore… Assuming you make Open-Xchange backups of course.