https://www.baeldung.com/linux/arm64-armel-armhf-overview
So, arm64 is sometimes referred to as aarch64. But the github arm64 appimage builds are not compatible with Ubuntu on raspberry pi 4 etc, maybe because of library differences, since the github runners are Ubuntu 24.04.
VirtualBox Manager
> Right-click on the VM
> Select "Move"
> Choose the new location and click "Move"
(Tho' the progress bar doesn't seem to work, it moved the VM and associated files to the external drive in approx the usual time it would take for a 12 GB file move.)
I was trying to recharge another prepaid Airtel number with "international roaming plan 2997" for 365 day validity.
Tried with Airtel thanks app from my Airtel mobile - failed.
Tried from website - failed.
Tried calling customer care - they said try going to a shop.
Tried from shop - failed.
Tried sending them an email to 121@in.airtel.com - "We noticed that you're contacting us from an email ID that isn't linked to your Airtel account.
You shall write back to us from your registered ID or reach out to airtel thanksapp get instant support 24x7 right from the help and support section."
The help and support section is a chatbot. There didn't seem to be any option to contact a human being.
Finally, I thought maybe trying from the Airtel app on the actual prepaid account for which Intl. Roaming was needed - success. Edit - half an hour later, that transaction was reversed, too!
Airtel's own customer service people did not know this, the shop guys (tried two different shops) did not know this, it is not mentioned anywhere that these intl. roaming plans need to be bought from the phone which is actually going to roam!
Found this option,
--dns-cloudflare Obtain certificates using a DNS TXT record (if you are using Cloudflare for DNS). (default: False)
from
https://eff-certbot.readthedocs.io/en/stable/man/certbot.html
And documentation for this plugin is at
https://certbot-dns-cloudflare.readthedocs.io/en/stable/index.html
(example invocation at end)
and how to install plugin is
sudo apt-get -y install python3-certbot-dns-cloudflare
https://installati.one/install-python3-certbot-dns-cloudflare-ubuntu-20-04/
As mentioned in the previous post, our server migration involved consolidating a web server into a DB server - we chose this method, since cloning the DB server was quick, while export followed by import of MySQL databases takes quite a bit longer as noted in the earlier 2024 migration post.
Copied the ssh private key for the destination server to the source server, and created an rclone remote using SFTP to the destination server.
zip -r -q webserver1.zip /path/to/webserver/files
(repeated this for all the web server directories later)
rclone copy webserver1.zip rcloneremote:/home/azureuser
(repeated this for all the other zip files later)
From the destination server,
unzip webserver1.zip
cd path/to/webserver/
sudo mv files /path/to/webserver
cd /path/to/webserver
sudo chown -R azureuser:www-data .
sudo chmod -R 775 .
----------------------------------------------
Then, the apache config files -
sudo zip -r -q etcapache.zip /etc/apache2
(rclone copy etc, and change ownership to root)
and the letsencrypt certificates etc,
sudo zip -r -q etclets.zip /etc/letsencrypt
(rclone copy etc, and change ownership to www-data for the file/directory which it needs, and the others to root)
-----------------------------------------------
With these, the files to be copied for the web servers were done. And I could start them up -
sudo a2ensite webserver1
sudo systemctl reload apache2
etc.
Also needed were
Solution was to install ghostscript,
sudo apt install ghostscript
--------------------------------------------------------
Then the php max_file_upload also had to be modified according to this earlier post, https://hnsws.blogspot.com/2021/03/some-post-install-changes-needed-for.html
sudo nano /etc/php/8.3/apache2/php.ini
( Ctrl+w to find and change post_max_size
Ctrl+w to find and change upload_max_filesize
Ctrl+w to find and change max_execution_time - set to 600 for now.)
sudo systemctl restart apache2
and also did the same for /etc/php/8.3/cli/php.ini
-----------------------------------------------------------
When upgrading a plugin, a warning was shown that php extension soap was not installed, and that update will continue only after it is installed. So,
sudo apt install php-soap
-------------------------------------------------------------
Edit - a few days later -
https://linuxize.com/post/how-to-change-hostname-on-ubuntu-22-04/
sudo hostnamectl
sudo hostnamectl set-hostname our-desired-hostname
-------------------------------------------------------------
Then, a warning while updating a plugin - max_input_vars must be at least 5000
sudo nano /etc/php/8.3/apache2/php.ini
sudo nano /etc/php/8.3/cli/php.ini
sudo systemctl restart apache2
-------------------------------------------------------------
Via https://stackoverflow.com/questions/76833923/safe-way-to-clean-var-lib-docker
/var/lib/docker was using up 16 GB.
sudo docker system prune --all --volumes
WARNING! This will remove:
- all stopped containers
- all networks not used by at least one container
- all anonymous volumes not used by at least one container
- all images without at least one container associated to them
- all build cache
On Linux Mint running Xfce, via https://forums.linuxmint.com/viewtopic.php?f=47&t=191832
Installed via Software Manager.
KAlarm needed to download 400 MB! So, instead chose Alarm-clock-applet which was only 563 kB. Shows up in the Applications menu as Alarm Clock. Can set time or timer.
Just a quick note of appreciation for Github Actions. I've moved most of my software work to directly editing on github and building with github actions, due to a variety of reasons, like
When trying to build OpenSpace for ARM64, came across issues with webbrowser ext - CEF binary being downloaded was cef_binary_102.0.10+gf249b2e+chromium-102.0.5005.115_linux64.tar.bz2 while we need ...linuxarm64.tar.bz2 for ARM64
In this case, this file seems to be responsible - https://github.com/OpenSpace/OpenSpace/blob/master/modules/webbrowser/cmake/cef_support.cmake
which we can fork and modify. In general, for other submodules not present in the main repo, the procedure seems to be:
How do I replace a git submodule with another repo? - Stack Overflow
If the location (URL) of the submodule has changed, then you can simply:
- Modify the .gitmodules file in the repo root to use the new URL.
- Delete the submodule folder in the repo rm -rf .git/modules/<submodule>.
- Delete the submodule folder in the working directory rm -rf <submodule>.
- Run git submodule sync. git submodule sync --recursive
- Run git submodule update.
More complete info can be found elsewhere:
If repo history is different then you need to checkout new branch manually:
git submodule sync --recursive
cd <submodule_dir>
git fetch
git checkout origin/master
git branch master -f
git checkout master
And apparently with Git 2.25 (Q1 2020), you can modify it.
git submodule set-url -- <path> <newurl>
One of our wordpress websites was not entering recovery mode.
... email from Wordpress regarding a fatal error while doing a setting in the menu using Astra theme. We had encountered such an error earlier also but could recover the site through the recovery link. However today on clicking on the recovery link it says recovery not initialized. ...
So, we had to disable plugins in order to be able to access the site. To follow the SSH/SFTP method described in this page - https://kinsta.com/knowledgebase/disable-wordpress-plugins/
But ... files could be opened but cannot rename since it says permission denied
So, just adding the ssh user to the www-data group was not enough -
sudo adduser thewordpresswebsiteadminuser www-data
also had to chmod the parent directory to 775 - was 755 earlier.
cd theparentdirectory
chmod -R 775 *
Then renaming worked.
Tried running the OpenSpace AppImage on a fresh Ubuntu VM running atop Virtualbox.
Error - error while loading shared libraries: libjack.so.0: cannot open shared object file
sudo apt install libjack0
solved that issue.
But then,
(D) CefHost Remote WebBrowser debugging available on http://localhost:8088
[0408/141049.216978:FATAL:setuid_sandbox_host.cc(157)] The SUID sandbox helper binary was found, but is not configured correctly. Rather than run without sandboxing I'm aborting now. You need to make sure that /tmp/.mount_OpenSpHMdIhf/home/runner/source/OpenSpace/build/modules/webbrowser/ext/cef/cef_binary_102.0.10+gf249b2e+chromium-102.0.5005.115_linux64/Release/chrome-sandbox is owned by root and has mode 4755.
Trace/breakpoint trap (core dumped)
Tried running the AppImage as as root, could not connect to display - (should probably have tried pkexec as mentioned in a previous post, but instead, I tried to solve the appimage issue.)
Looks like this is due to apparmor - a bug report - https://askubuntu.com/questions/1512287/obsidian-appimage-the-suid-sandbox-helper-binary-was-found-but-is-not-configu
The --no-sandbox or --disable-setuid-sandbox methods did not work. But the apparmor method worked -
Created a file /etc/apparmor.d/openspaceappimage with the following content:
# This profile allows everything and only exists to give the
# application a name instead of having the label "unconfined"
abi <abi/4.0>,
include <tunables/global>
profile openspaceappimage /path/to/OpenSpace-0.20.1-1-x86_64.AppImage flags=(default_allow) {
userns,
# Site-specific additions and overrides. See local/README for details.
include if exists <local/openspaceappimage>
}
Rebooted the VM, then the appimage ran. But then, blank screen after loading etc.
The web-ui at http://localhost:4680 works.
OnlyEarth profile loads, but only at 0.2 fps. But that seems to be due to 3d acceleration not being enabled on the VM's display. For that, I suppose guest additions are needed? Anyway, shut down the VM, changed display RAM to 128 MB, enabled the 3d acceleration checkbox in Virtualbox VM settings, (I see that I had done so in an earlier post), booted up the VM, changed display resoltuion inside the VM by right-clicking on the desktop to 1920x1080, then ran OpenSpace, mostly OK.
Takes a minute or two to initialize GL, then load assets, till then black screen for OS.
The default display configuration doesn't seem to work - black screen. But gui portrait, single fisheye gui etc worked fine. With OnlyEarth profile - 100 fps average with occasional stuttering.
Tried the default profile also later - it took around 2 hours to download all the 'sync' files - and ran very very slow, not usable.
Using QEMU - https://marko97it.github.io/rpi5-qemu-win11/
Requires Pi5 and Micro SD card or a SSD drive with more than 64 GB of space - I have a Pi4, so didn't try it.
Another product which offers ssh tunnels - earlier post about cloudflare's offering is https://hnsws.blogspot.com/2025/02/cloudflare-for-reverse-proxying-on.html
Twingate: It's time to ditch your VPN
via
5 reasons EVERYONE needs a home server
Can you please check if there are any background jobs running?
when trying to create a quiz (just a duplicate of an existing one)
Attempted to create a blank quiz and it fails like below. This does not have any questions. So seriously something is wrong with the backend.
(removed a screenshot, which showed "Recalculating grades...")
Doing a search,
Found
https://moodle.org/mod/forum/discuss.php?d=401173
https://tracker.moodle.org/browse/MDL-49324
So, this is possibly a bug. But I cannot fix Moodle bugs for you.
Not sure how I can help you with this. I can turn off cloudflare caching so that you will get a bit longer before timeout. (Found that this is already done.)
Then you can try putting the site in maintenance mode and then try creating the quiz. But if that also fails, I have no further ideas.
Managed to create the sections for this module. Hopefully things get faster to load for users tomorrow.
Trying out more resources for "free" AI generated movies - my earlier post about this is here - this video - Install WAN 2.1 The 100% FREE AI Video Generator : Very EASY & QUICK! - talks about installing
https://pinokio.computer/
(browser which allows to install and run various AI tools)
WAN2.1 is the actual video generator
And can do online for free,
https://wan21.net/ai-video-generator
but sometimes the queue takes a long time. Afternoon 1:30 IST, started rendering this prompt "A moonlit night sky with scattered clouds" rendered in around a minute, with only less than a minute in the queue. The resulting video is below. 5 credits a month for the free account, I think.
Chainner - A node-based image processing GUI - seems to have a relatively easy-to-use installer - deb files for Linux, Windows installer, etc. And it has a dependency manager which can install the required dependencies. Tried it out, but unfortunately, it could not use the external stable diffusion api - maybe because I didn't run the web ui with API enabled? or is it that the API has changed and hence it gives errors like "invalid HTTP request"? Tried running chainner after running easydiffusion - could not connect.
api wiki says latest info is at :7860/docs
http://127.0.0.1:7860/docs
Video - how to upscale images with chainner -
Models from https://openmodeldb.info/
(old site was https://upscale.wiki/wiki/Main_Page#The_Model_Database )
Chose https://openmodeldb.info/models/4x-RealWebPhoto-v4-dat2
Took 10 minutes. Seems to be using cpu and not gpu
8x upscale with onnx took 24 minutes. Looks like water colour and not pointillist like the previous upscale with Stable Diffusion.
8x upscale with onnx using the model 4x-RealWebPhoto-v4-dat2 compared with the original image before scaling down and upscaling. Click on the image to see it larger.
Probably there may be some models which would do fast upscaling with realistic results (unlike the compact model below which seems to be optimised for anime).
Recommended models at
https://phhofm.github.io/upscale/favorites.html
Compact model - https://openmodeldb.info/models/2x-HFA2kCompact
For video, the youtube video above used video frame iterator, and the compact model. Now the interface has video input and video output nodes, which will automatically create video from the frames. Using the compact model, the video upscaling and processing was completed in just a few seconds, for 250 frames Baba. Looks a bit like anime / cartoon / water colour. If the numbers under the chainner nodes are the times taken, then 0.04 sec per frame, 9.8 sec for encoding to vid.
Edit: There are lots of youtube tutorials for video upscaling, including ones using colab - https://www.bing.com/videos/search?q=stable+diffusion+video+upscaling
