Problem: The repository ‘http://de.archive.ubuntu.com/ubuntu impish Release’ no longer has a Release file.
Solution:
sudo sed -i 's/impish/jammy/g' /etc/apt/sources.list
sudo apt update && sudo apt full-upgrade
Manjaro Linux: “Account locked due to three failed login attempts..”
So annoying ..
Edit /etc/security/faillock.conf with sudo and add deny = 0.
Today I handed in my first #ProductProposal 🥳
And it was quite fun to write it.
Since pitching products is not my day-to-day business I spent some time to research how to write such a proposal. My first search results were aimed at “elevator pitches” or “startup pitches”. So I had to dig deeper ..
Anyway: due to confidentiality I can’t show-case anything here. I can only share this: I drew some #mockups with draw.io, put in the technical features and spent the majority of the time on writing a teaser. Something which will catch the audience immediately and makes them think: wow, we really have to sponsor this project!
Oh, why do I say “we”? #datamodul opened an innovation contest to source the ideas of their employees. Quite a clever idea. And a team can achieve so much more than a collection of individuals.
So .. even if that proposal is a dud, I learned some things, especially about writing a proper introduction. My first iteration was quite technical 😅
# Lessons learned:
* How to do a proper pitch, reduce technical details, appeal to a #vision, create a pitch deck with slides
* But also: go fast, break things. Too much time was spent on refinement and polishing. I had set myself an arbitrary date six weeks ago and in retrospective I had already 80% of the material at that time. I’ll be better next time: #time-boxing upfront.
Coursera: project management
I’ve finished the “Foundations of Project Management” on the weekend. This is the first milestone out of six for the “Google Project Management: Professional Certificate”.
This was my first Coursera-online learning-experience and I liked it. A quite refreshing mix out of videos, quizzes and reading which kept me on track. Even finished some days earlier than anticipated by the regular four week-schedule 😅
I’ll definitely continue because my day-to-day business requires a lot of management .. and even with some hands-on experience, there is always the opportunity to improve.
The best weather app so far ;)
People love forecasts. And almost everyone I know has one or two apps on their device to check it.
But nothing beats
while :; do clear; curl wttr.in/Laim; date; sleep 60; done
ssh: unable to negotiate – not matching host key type found
problem:
Unable to negotiate with 192.168.100.73 port 22: no matching host key type found. Their offer: ssh-rsa
more details:
ssh -vvv root@192.168.100.73
then fix by saying which type to use:
ssh -vvv -oHostKeyAlgorithms=+ssh-rsa root@192.168.100.73
Else adapt the config. See https://askubuntu.com/questions/836048/ssh-returns-no-matching-host-key-type-found-their-offer-ssh-dss
————
edit: since there was still a problem with deploying binaries to the target (embedded device), I’ve edited the ssh-config:
cat > ~/.ssh/config
Paste
Host 192.168.100.*
HostkeyAlgorithms +ssh-rsa
PubkeyAcceptedKeyTypes +ssh-rsa
Enter + CTRL+C, done :
Fresh Raspberry Pi 400, but package-manager ‘dead’
It’s never early enough to inspire, so my firstborn got two days ago her first own computer. I don’t want that she grows comfortable with touching a smartphone, but not knowing what happens in the “back”, so she got a Raspberry Pi 400.
I did not expect that the red-white color-combination of the keyboard-like module with it’s raspberry-button will spark so much joy!
The first evening we unwrapped everything and she put all cables in and we booted it right from the preconfigured sd-card. Nice, very comfortable.
Problem:
Then I wanted to run ‘apt-get’ to fix the updates and maybe install a paint-like program ..
Error
Repository ‘http://deb.debian.org/debian buster-updates InRelease’ changed its ‘Suite’ value from ‘stable-updates’ to ‘oldstable-updates’
So neither apt-get update or any of the first tips I checked, worked. Until I found this:
sudo apt-get update --allow-releaseinfo-change
Problem solved, but – would a newcomer or young person be able to fix this?
I doubt it. This isn’t really user-friendly ..
edit:
Anyway: Since update of the distribution from ‘buster’ to ‘bullseye’ by editing two package lists did not really go well, I’ve deployed a ‘real’ bullseye-image onto the sd-card and we fixed the rest of the configuration in minutes 🙂
external backups pt. II
The worst archivist?
Of course, I know him.
It’s me.
So, some month ago I was writing about how to create and maintain some external backup [link] from data stored on the NAS.
I’ve also put some fancy commands, but when I wanted to do the scheduled refresh of the backup, I noticed, that my ‘documentation’ is without any value.
And this is due to continued iterations of the setup and the used commands, but not updating the documentation.
- Setup
* activate the rsync-access on the DS213 via UI (else ‘permission denied’ is reported even when you can SSH in and check the rsync-version and then wonder what fails ..)
* plug the external HDD to the Raspberry Pi 3B
* run via VNC-remote-login in a bash on the RPi
rsync -avrh admin@ds213:/volume1/Photoshare_privat/ /media/pi/1.42.6-25556/Photoshare_privat/ && rsync -avrh admin@ds213:/volume1/homes/Marcel/ /media/pi/1.42.6-25556/homes/Marcel/ && rsync -avrh admin@ds213:/volume1/homes/ruzica/ /media/pi/1.42.6-25556/homes/ruzica/ && rsync -avrh admin@ds213:/volume1/homes/admin/ /media/pi/1.42.6-25556/homes/admin/ && rsync -avrh admin@ds213:/volume1/Camera/ /media/pi/1.42.6-25556/Camera/ && rsync -avrh admin@ds213:/volume1/photo/ /media/pi/1.42.6-25556/photo/ && rsync -avrh admin@ds213:/volume1/Musik/ /media/pi/1.42.6-25556/Musik/
to copy all relevant partitions
qmake: shared libs without versioning and symlinks
By default share libraries have a symlink and versioning. To avoid this, add to respective *.pro:
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# disable symlinks & versioning CONFIG += plugin |
iwyu: fatal error: ‘stddef.h’ file not found
Include-what-you-use and Qt are not friends. iwyu-support in QtCreator is requested for a while, nobody cares.
So I installed it via apt; set an override to make and reran the build-process on a cleaned project:
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`-k CXX=/usr/bin/iwyu |
Result: more than fifty errors like “fatal error: ‘stddef.h’ file not found”.
Some said that clang is missing (because that header is part of the installed package, my clang was 12 – iwyu was built against 11).
So the solution is:
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sudo apt-get install libclang-common-11-dev |