tl;dr: use the GPIO pins of a Raspberry Pi to flash Arduino boards without a bootloader
To keep things short: I've had an Anet A8
3D printer for a while now and wanted to flash an updated version of its
Marlin firmware.
For some reason however, the bootloader was broken. So I couldn't flash it with
avrdude by simply using a USB cable. For this case you can find lots of
tutorials on how to flash Arduino boards with a second Arduino. I didn't have a
second Arduino at the time though … so why not just bit-bang it from a Raspberry
Pi instead?
tl;dr: Use simple systemd units to supervise your containers.
A while ago I stumbled upon podman, which touts itself as an alternative to
Docker. Not only does podman not use any big fat daemons™ but it makes it rather easy to run
containers in a user-namespace, i.e. with greatly restricted privileges on your system. The fun
thing is: you are still rootwithin the container!
tl;dr: use $Format:%h$ in a file and mark for substitution in downloaded archives with 'file export-subst' in .gitattributes
Trying to implement some sort of automatic versioning based on your git commits or tags is not as easy as it should seem. The idea is to use a feature built into the revision control system to modify your project files and increment version counters automatically or embed commit information into software builds - in my case: the --version output of Go applications built with cobra.
Ideally, the solution should not require executing some hacked-together scripts or configuring overly many settings on developer machines, yet still embed version information when a user donwloads a release to build locally.
read on »
tl;dr: running speedtest-cli with a cronjob and plotting the results
I am supposed to have a 500 Mbps internet line at home. Last week it really didn't feel like that
(again). Pages would take ages to load, streams would stutter miserably or simply abort and
downloading OS updates simply timed out. So I set out to measure my actual bandwidth over a longer
period of time.
tl;dr: the option to add TOTP security keys on PayPal is somewhat hidden, it uses Verisign Identity Protection provisioning
It is becoming common knowledge that you should use two-factor authentication
whenever possible. Some services allow the use of TOTP apps on your smartphone,
some only want so send you SMS codes .. and others use proprietary tokens.