error: Can't load uri https://flathub.org/repo/flathub.flatpakrepo: TLS support is not available
Fix: need to set env. var:
GIO_MODULE_DIR=/usr/lib/x86_64-linux-gnu/gio/modules/ flatpak -v remote-add --if-not-exists flathub
https://flathub.org/repo/flathub.flatpakrepo
Add a new tag into existing subject tags in the .xmp sidecar:
exiv2 -M 'set Xmp.digiKam.TagsList my-new-tag' mo xxx.JPG.xmp
exiv2 -M 'set Xmp.dc.subject my-new-tag' mo xxx.JPG.xmp
Print specific tag:
exiv2 -g TagsList pr xxx.JPG.xmp
Comparing dmd, ldc, rust based on the same algorithm implementation:
https://github.com/exhu/alimg/tree/master/dmd
https://github.com/exhu/alimg/tree/master/bufdither-rust
rust version is the fastest (2.5 s) vs dmd's 5 secs, ldc's 2.9 s.
rust version also consumes less memory:
Maximum resident set size (kbytes): 3716
Elapsed (wall clock) time (h:mm:ss or m:ss): 0:02.50
DMD:
Maximum resident set size (kbytes): 5380
Elapsed (wall clock) time (h:mm:ss or m:ss): 0:05.28
LDC:
Elapsed (wall clock) time (h:mm:ss or m:ss): 0:02.91
Maximum resident set size (kbytes): 8044
The D programming language version turned out to be easy and quick to implement as it was very close to Java/C++.
The Rust version took very long time to implement, as it required considerably more time to learn Rust's basics.
Install Ventroy on a usb, normally copy ISO files to the drive, boot.
https://www.ventoy.net/en/index.html
https://askubuntu.com/questions/1224125/font-characters-displayed-as-squares-in-ubuntu-18-04
rm -rf ~/.cache/fontconfig
sudo fc-cache -r -v Delete every found fontconfig folder from the snap cache, e.g. find ~/snap/chromium/ -name 'fontconfig'rm -rf ~/snap/chromium/common/.cache/fontconfig/
TP-Link Archer T9UH v1 [Realtek RTL8814AU] driver is at https://github.com/aircrack-ng/rtl8814au.git
Kubuntu 20.04 LTS
Problem: wired headphones reproduce constant hissing sound, noise changes with the cursor movement etc.
Solution:
sudo hda-verb /dev/snd/hwC0D0 0x1d SET_PIN_WIDGET_CONTROL 0x0
Sources:
https://www.reddit.com/r/thinkpad/comments/8j8208/audio_crackling_through_both_headphone_jack_and/
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1805079/comments/20