When using Docker containers for development environments (also known as the opposite of micro-services) a common scenario is that you are using a laptop and want to run docker containers on a more powerful machine like a workstation or build server.
This can be done by exposing the Docker service API to the network and connecting to it from a different host. Here’s how to do it.
Syncthing is a decentralized continuous file synchronization software with many security features, like end-to-end encryption, device authentication, permission management and more. Both the protocol specification and the Syncthing software are free and open source.
With Syncthing files can be easily kept in sync across multiple devices, e.g. one desktop PC, one notebook and several mobile devices, *without* relying on third-party infrastructure (optional). File syncing can be limited to a local Wifi network, avoiding sending files to the outside world altogether. Here’s how.
Since some time now Microsoft has blessed all Windows 10 users with the (confusingly dubbed) Windows Subsystem for Linux (WSL).
WSL is a nifty application which allows us to get all the good things we appreciate in a Linux environment on Windows 10 too.
When working in WSL a lot, the files which Windows sets aside for WSL will grow increasingly larger. Up to the point where a reasonable user will consider moving these WSL files to a difference location, to make space on the system drive. Here’s how.
Volare is a Python package intended to manage PDKs supported by OpenPDKs. It is used by DFFRAM and other projects.
In the future it probably is supposed to handle other PDKs as well, but as of 2022 only the Skywater PDK from Google is available.
The following is a brief overview of how to use volare.
I had the unfortunate experience to lock myself out from using sudo on my NAS server.
All I wanted to do was give my user permission to run smartctl, which usually requires root privileges. This can be achieved by editing the /etc/sudoers file.
However I did not use visudo for this task. After removing the pound sign from the #include statement – which, let’s be honest, looks like a comment that needs to be uncommented – I saved the file and closed it.
At this moment visudo would have raised an error, if I had used it, and prevented me from saving the invalid sudoers file.
Long story short I was locked out from using the sudo command. After booting into a Linux live/rescue image from USB I could fix the syntax error in /etc/sudoers.
The moral of the whole story, better use visudo when editing /etc/sudoers.
That’s it.
References:
At some point we all want to store Docker images and volumes on a different drive, to avoid the system drive being filled up as the volumes grow. Here’s how.
For a while now Google has been collaborating with SkyWater Technology to create what many refer to as free and open source silicon (FOSSi). The project gained traction in 2020 and is continuing to gain momentum.
The proclaimed goal is to bring chip design to the masses and enable everyone from academia, industry and makers to create their own computer chips. If this plan succeeds it would mean a considerable shift in the chip industry which traditionally is very secretive and dominated by just a few big corporations and their partners, connected by a opaque web of interdependencies. (Surely Google counts as the underdog in comparison *cough*)
This is a very brief article or rather a reminder to myself, about how to install MiniDLNA on Ubuntu Server 20.04. I always knew this piece of software by it’s old name MiniDLNA, but apparently it was renamed and is now called ReadyMedia. There don’t seem to be many changes below the hood though.
MiniDLNA is a light-weight media server using the DLNA protocol. Through MiniDLNA a library of media files is created which allows a user to very conveniently browse through the files and start audio and video playback. Most SmartTVs and Android phones support DLNA out of the box.
It is sometimes desirable to bring a Wireguard interface up each time the system boots. Using wg-quick it is dead easy to create a service which takes care of the required steps. In case wg0 is already up and running, it must be taken down before the service can start successfully.
$> sudo systemctl enable wg-quick@wg0.service $> sudo systemctl daemon-reload $> sudo wg-quick down wg0 $> sudo systemctl start wg-quick@wg0
References:
Since Windows 10 version 1709 (“Fall Creators Update”) neither SMB1 nor NetBios device discovery is supported anymore.
Due to this change a Samba share which is hosted on a Linux machine may no longer show up in the Network view of Windows Explorer.
Although the Samba share can still be reached by it’s hostname or IP address (and share name) this is a slight inconvenience.
Luckily there is a small Python tool called wsdd which provides a Web Service Discovery (host) daemon. What follows is a short guide on how to install and use wsdd on Ubuntu Server 20.04 (works similar for other Debian based distributions).
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