Posts By: jonny

Nginx Reverse Proxy

centos logo

Using CentOS 6 I installed Nginx with:

and amended the config file for the default website i.e.

With the following content:

So visiting the web address frontend.domain.co.uk:8080 as configured under the ‘server’ section will proxy the website from st.domain.co.uk:80 Advice on the web specified using $host or configuring the proxy_set_header:

However,… Read more »

Selectively Checking Disk Usage Excluding Files and Folders

disk usage

Normally to check the disk usage of directories on a linux system I would run:

However, occasionally I want to exclude particular directories that take a long time to check and/or that I am not interested in anyway. The example below run from the root of the filesystem skips checks for /home /local /var… Read more »

Fido U2F Security Key

FIDO U2F Key Opening

So I ordered a FIDO U2F Security Key from a French company ‘Plug-Up’ to have a little play.  It is used in 2-factor authentication so when logging in to a service you first enter your username and password and if correct your are prompted for your second factor (a code sent by SMS or a… Read more »

Environment Modules

Environment Modules allow for management of environment variables  when using multiple compilers, multiple libraries, or even versions of applications that you might need to run. Rather than change $PATH, $LD_LIBRARY_LOAD, or $MANPATH for each you can use Environment Modules to handle the path changes to ensure you run the appropriate version correctly. Installation On CentOS… Read more »

Saving Streaming Video with VLC

VLC Convert Video Stream

I was asked by a relative if a live video stream could be saved for later viewing. I found the (m3u8) address for the live video stream by right-clicking the link on the website and used this in VLC. VLC is freedom software available from the VLC website. From the VLC menu bar I chose… Read more »

Server Technology Sentry Switched CDU

Sentry CDU

A few notes for future reference. I am playing with a power distribution unit from Server Technology  – Model CW-16VE-P32M Initially to configure the device I plugged both the Cabinet Distribution Unit (CDU) unit and a laptop into a switch, setting the IP address to the same subnet as the unit. I set the laptop… Read more »

Favicon Generator

Note to Self: The service at http://realfavicongenerator.net is great for generating favicon’s and icons for other mobile platforms.    

Deploying a Web Project from Gitlab

gitlab deploy hooks

I wanted to automatically deploy a web project when any updates are pushed to the gitlab repository. To do so I added a ‘Web Hook’. The Web Hook calls a URL in response to ‘push’ events. I created a PHP page to be called by the Web Hook: So in response to push events gitlab_hook.php… Read more »

Huge Pages in CentOS 6

centos logo

To check the size and amount of Huge Pages use:

This should so something like:

To change the number of HugePages use the following:

This would allocate 2560x2048kB = 5GB

To check the impact on memory:

Reset Huge Pages The change can be applied permanently in /etc/sysctl.conf but to… Read more »

Filezilla is Dead – Killed by Malware

With a heavy heart I can no longer recommend FileZilla.For years I had pointed users to Filezilla for several reasons including availability on multiple platforms and support for FTPS. I have now been informed that Windows users who download FileZilla via Sourceforge are getting an installer that tries to install crapware. Filezilla are aware of… Read more »