August 7, 2021
Running a Python Script on Boot with Systemd
This short blog post details how you can run a python script on boot using systemd.
Tag: Linux
July 4, 2020
Fixing ssh-keygen Unknown Option -G or -T on Ubuntu 20.04
This blog post talks about how you can resolve the problem “ssh-keygen Unknown Option -G” on Ubuntu 20.04.
June 20, 2020
Fixing “fork failed: Resource temporarily unavailable” on Linux
This blog post talks about how you can fix the error “fork failed: Resource temporarily unavailable” on Linux.
March 20, 2020
Unblocking Minecraft Server port 25565 on Fedora
This post describes how you can unblock port 25565 to allow Minecraft Server traffic through in the Fedora firewall.
May 18, 2019
How to get Linux user information from a User ID
This blog post talks about how you can get user information from a Linux User ID.
April 10, 2019
Installing the SDL 2 Dev tools on Fedora
This post quickly lists how you can install the SDL 2 dev tools on Fedora.
December 29, 2018
Installing Linode Longview on Fedora 28
This post talks about how you can install Linode Longview on Fedora 28. Why doesn’t the standard instructions work? It turns out that you cannot just install Linode Longview on Fedora 28 as it isn’t a supported operating system. When running the automatic install script the following error will appear. Failed to synchronize cache for
November 14, 2018
Enabling SSH on Ubuntu 18.04
By default Ubuntu 18.04 doesn’t enable SSH, this post describes the steps you need to set up SSH.
October 31, 2018
How to set the Timezone on Ubuntu 18.04 Server
Today I am writing about how you can change the timezone on Ubuntu 18.04 Server.
October 27, 2018
Setting up the CI20 for the cluster
This post talks about the steps I have followed to set up my Creator CI20 for the Raspberry Pi Cluster.
October 24, 2018
How to install Python Pip on Ubuntu 18.04 Server
This post describes how you can install Python Pip on ubuntu 18.04.
October 17, 2018
Adding a Creator CI20 to the cluster
This post talks about the Creator CI20 and explains the differences between it and the Raspberry Pi.
August 29, 2018
Blocking a user or IP from a server using iptables
This post describes how you can block a user from your webserver using iptables.
July 25, 2018
How to Install the official MySQL community server on Fedora 28
Today I talk about how you can install the official MySQL community server on Fedora 28.
July 21, 2018
Unblocking Kibana port 5601 on Fedora
This post describes how you can unblock port 5601 to allow Kibana traffic through in the Fedora firewall.
May 23, 2018
Removing a passphrase from a SSH key
Here I explain how you can remove a passphrase from a SSH key.
February 10, 2018
Raspberry Pi Cluster Node – 04 Configuration Files with ConfigParser
This post builds on the third step to create a Raspberry Pi Cluster Node to store our configuration settings in a config file. Here we move all the configuration settings in our script into a useful .cfg file using the python ConfigParser.
February 7, 2018
Installing Dropbox on Fedora 27 XFCE
This blog post describes how you can install Dropbox on Fedora 27 XFCE.
December 20, 2017
Backup a Raspberry Pi with Rsync
I am going to upgrade our previous Raspberry Pi backup script that previously used Secure Copy to one that uses rsync. The primary reason for this is that rsync will only copy new or changed files over. This post goes through the reasons why you might want to use rsync instead of scp when performing a
December 9, 2017
Raspberry Pi Cluster Node – 03 Basic node communication between two nodes
This post builds on the second step to create a Raspberry Pi Cluster Node to create a hello world application across two different scripts. Here we will create a socket connection between the two and use it to send a message to the master.
November 29, 2017
Raspberry Pi Cluster Node – 02 Packaging common functionality
This post builds on the first step to create a Raspberry Pi Cluster node to package the common functionality that will be shared between master and clients.
November 22, 2017
Compressing Raspberry Pi backups automatically
Today I will be improving the basic script used to backup my Raspberry Pi’s so that it compresses the files after they have been copied. This will allow me to store several backups instead of having a single copy stored on my computer. This assumes you have followed the first tutorial to create a Raspberry
November 8, 2017
Enabling SSH on Ubuntu 16.04
By default you are not able to SSH into an Ubuntu 16.04 machine and this blog post describes the steps needed to install SSH server.
November 4, 2017
Upgrading Raspbian Jessie to Raspbian Stretch
This post describes how you can upgrade Raspbian Jessie, version 8, to Raspbian Stretch, version 9. Raspbian Stretch was recently released and while they recommend installing from fresh you are able to upgrade the versions. Here I follow the steps of upgrading the Raspberry Pi’s in my cluster including some of the common problems that
November 1, 2017
Raspberry Pi Cluster Node – 01 Logging Liveness
This post describes how to make a simple python script that logs the node is alive every 10 seconds.
October 28, 2017
Exclude Fedora packages from updating with dnf or yum
This post describes how to exclude specific packages from being updated with Fedora and dnf or yum
October 21, 2017
Virtualized Raspian OS with Virtualbox
This post walks you through the process of installing the Raspberry Pi OS, Raspbian, with VirtualBox. I am going to use this at times to test my software running on the OS that the Raspberry Pi Cluster runs.
October 4, 2017
apt Unable to lock the administration directory (/var/lib/dpkg/) is another process using it?
This post explains why you may sometimes not be able to run apt commands and how to find out what is causing the issue.
September 30, 2017
Grant sudo access for a user with Raspberry Pi Raspbian
This blog post describes how you can enable sudo for any user on the Raspberry Pi OS, Raspbian.
September 20, 2017
Removing IP Block from WHM cPHulk
If you are locked out of your website due to the cPHulk blocking your IP address there is an easy way to unblock yourself. This post describes how you can do this from your servers command line.
September 9, 2017
Virtual box shared folder access denied Fixed
I was looking to add shared folders to my Fedora VM but during mounting them there was an error. The error “access denied” appeared each time I attempted to mount the volume. This post explains why this happens and what you can do to fix it.
August 30, 2017
Creating a Raspberry Pi backup script with scp and Bash on Windows
This post describes a simple way to keep backups of a Raspberry Pi or any other Linux computer.
August 5, 2017
Add a new user account in Raspbian Raspberry Pi
For my cluster project I will add a new user to each Raspberry Pi. This is so the user I use for all other systems will be the same on the Raspberry Pi’s. This post describes how to add another user to Raspbian OS.
July 26, 2017
Virtualbox Guest additions on Fedora
This post describes how to install virtualbox guest additions on a Fedora virtual machine.
July 22, 2017
Debian apt-get installer asking to insert CD install disk
inThis blog post describes why Debian is asking you to insert a CD while using apt-get and how you can stop this.
July 19, 2017
sudo command not found on Debian Fixed
AIn this blog post I describe why you get sudo command not found on Debian and what you can do to fix it.
June 17, 2017
Overview of the Raspberry Pi Cluster
Now I have the power supply and built the stacking system I can show off the clusters initial state. Every Raspberry Pi in the cluster Here are the 7 initial Pi’s that are to become part of the cluster. Each have been given a codename to designate its position in the cluster. The Raspberry Pi designed “M” will be
May 27, 2017
SSH access with passwordless keyfile
I want to be able to access my Raspberry Pi Cluster and log onto any node without entering a password. To do this I can set up as passwordless SSH key. Generating a SSH Key To generate a SSH key you can use the command ssh-keygen. Once you have ran this you will get the
May 24, 2017
Powering a Raspberry Pi Cluster
The Raspberry Pi doesn’t come with its own power supply so you need to decide how to power it. The recommendation from the Raspberry Pi website is that they have “found that purchasing a 2.5A power supply from a reputable retailer will provide you with ample power to run your Raspberry Pi”. After doing some research
May 20, 2017
Create a Samba Share on Raspberry Pi Cluster
Something I want to do with my Raspberry Pi Cluster is mount a hard drive and share it like a windows share. To do this I am going to set up Samba on a Raspberry Pi. Installing the required packages To run samba as a service we need to install a couple packages. Running the
May 17, 2017
Installing Raspbian onto a Raspberry Pi
Here I suggest some recommended steps to install Raspbian on top of their install guide. Choosing an OS for the Raspberry Pi One of the main ways to install a Raspberry Pi OS is to download a disk image called NOOBS. This lets you choose to easily install a number of different OS’s. If you want to
October 26, 2016
VCHI initialization failed Raspberry Pi Fixed
If when running vcgencmd on a raspberry pi you get VCHI initialization failed then you need to add the video group to your user. The vcgencmd tool requires you have this group role so without it, it will give VCHI initialization failed. To add the user group to your user you can run: sudo usermod -aG
June 3, 2015
Mysql workbench working with key based exchange mechanisms
It appears newer linux sshd configs (fedora 22) by default include a smaller set of key exchange based mechanisms that they have turned on. This means that it gives errors saying it is unable to connect to the server. To fix this you need to enable some of the older key exchange mechanisms, Adding this line
February 8, 2015
Install Virtualbox guest additions on Fedora 21 XFCE
Installing via the normal route didn’t work and meant I couldn’t easily resize the screen. Doing the below allowed me to use the resize easily. Install rpmfusion on fedora run `sudo yum install akmod-VirtualBox VirtualBox-guest` run `cd /usr/src/akmods` run `sudo rpm -ivh VirtualBox-*.rpm` Once this was installed, rebooting will give you access to shared folders and fullscreen mode
September 2, 2013
Add a user to a group in Linux
How to add a user to a group in Linux usermod -a -G Its a simple as that. So for me adding the user “chewett” to the user “vboxusers” i run the command usermod -a -G vboxusers chewett The -a flag means that the new group is appended, without it you will overwrite your current
September 1, 2013
Location of GeoIP.dat for PHP
To find the location of GeoIP for PHP you can ssh into the server and use the “find” command. find / -iname GeoIP.dat Will return a list of file paths where the file with this name is found. In my case I found: /usr/share/GeoIP/GeoIP.dat /usr/local/share/GeoIP/GeoIP.dat /opt/geoip/share/GeoIP/GeoIP.dat In my case the bottom link was the one
March 18, 2013
Show trailing whitespace in Vim
Vim is a wonderful command line text editor with syntax highlighting and everything you could ask for provided you turn on the functionality. Recently i was shown that it was also show trailing whitespace with a quick addition to the .vimrc file. All you need to do is add the following: set list set listchars=tab:→\
March 6, 2013
Using Nvidia Optimus on Fedora
If your computer is recent and has an i3/i5/i7 intel core and a Nvidia graphics card it likely uses Optimus technology. This smart piece of software turns off the power-hungry Nvidia graphics card and runs most programs on the integrated intel graphics chip. In laptops this can save a lot of power. However this solution
March 3, 2013
Tile windows like Windows 7 on XFCE
Windows 7 has a really nice feature that lets you tile a window to the left or right of the screen, allowing easier placement. This is normally activated with the Windows-(left, right, up down) Arrow key combination. I had searched how to do this with XFCE for a while and today after upgrading to Fedora
February 25, 2013
XFCE Application Menu Icons Missing
After i installed Fedora 18 XFCE i found that it by default doesnt show the icons on the application menu. I normally navigate it by checking the images and not reading the words, so this inconvenienced me. On checking the properties I found that “Show icons in menu” was checked but it did not seem to
February 20, 2013
IRC client on Raspberry Pi – Screen and irssi
A IRC client lets you connect to a IRC server enabling you to join chatrooms on that server. IRC servers do not by default store logs while you are not logged in. This can be annoying if you wish to keep informed of whats going in on the chatroom. One solution to this is to never
January 22, 2013
Raspberry Pi!
During Christmas I got a raspberry pi and I have been waiting to start playing around with it for ages. Finally I decided to order the remaining pieces for it such as the power cable and SD card. Since I didn’t have a HDMI TV around I decided to plug it into the router and