Sam's Blog

My technical notes and tips from useful or frustrating experiences...

2 months ago

Pebble Time opens port 9000/tcp6 on Android Devices

Sam Cater

Did a port scan the other day and was surprised to find my phone was listening for connections on the LAN. Port 9000 on tcp6, which Nmap decided to call CSListener. Nmap scan report for H…

3 months ago

Docker, Arch Linux, and User Namespaces

Sam Cater docker   security   tips   Linux  

I recently tried to run Jess Frazelle's Chrome Docker image, she explains how to do that here. Whilst there is a little bit of understanding needed with what's going on (such as passing X11 through fr…

3 months ago

Using UFW on Fedora

Sam Cater tips   Linux   server   useful  

When switching to Fedora I was disappointed to find that there was no support for using Uncomplicated Firewall, something I enjoyed on Arch Linux. Although it is not in the Fedora repos, it can still…

4 months ago

Solution: KDE 5 Plasma - Massive Fonts after upgrade

Sam Cater

After running a full system upgrade on Arch Linux, all of my desktop environments save MATE were using a massive font size. This made all the windows balloon up as if I were running with 640×800. Part…

5 months ago

VirtualBox - 'VERR_CFGM_NODE_EXISTS' Solution - After Export and Import - OVF 2.0

Sam Cater helpful   tip  

A new node couldn’t be inserted because one with the same name exists. (VERR_CFGM_NODE_EXISTS). Found an understated bug online with exporting and importing Virtual Machines in VirtualBox, using the O…

6 months ago

Answer to Chromium's "Unable to Load Font File!" Error in Video

Sam Cater

I found that when using Chromium to play Video it would occasionally display the titled error message inside the video viewbox of pages like YouTube and Vimeo. The video won’t play at all. Turns out t…

8 months ago

ZipWorld in Wales

Sam Cater

The video below is the automated one provided by ZipWorld. Still fun to watch even if it is short and painfully low quality……

8 months ago

Squeaking palm-rest on T410/T420/T430? Easy fix.

Sam Cater thinkpad  

I’ve had annoying palm-rest squeaking on all the Thinkpads I’ve owned, usually when I rest my hands on the rests to begin typing. The creaking would continue as I increased and decreased pressure on t…

10 months ago

OwnCloud - Upload failed. Could not find uploaded file.

Sam Cater owncloud  

The precise error Owncloud would give at the top of the screen when I tried to upload a file was: Upload failed. Could not find uploaded file.I spent ages trying to fix this with nothing online to hel…

a year ago

Gnome Startup Crash when coming from KDE

Sam Cater

Had some problems with Gnome failing to start and crashing with the weird sad face image and ‘Oh no, something has gone wrong’ error. If you check the error journal with ‘journalctl | grep gnome’ you…