Dr. Kuo-Ping Chiao blog

2025年9月16日星期二

gnome online accounts google black

cf: https://askubuntu.com/questions/1424005/pop-up-window-goes-blank-when-adding-google-account-in-gnome-control-center

Run the command to access google accound:

WEBKIT_DISABLE_COMPOSITING_MODE=1 MESA_LOADER_DRIVER_OVERRIDE=zink gnome-control-center online-accounts

2025年9月7日星期日

Batch bulk delete google calendar

https://www.youtube.com/watch?v=hJdGBmHDafA

In short:

Select calendar, say NFL2025-26, 設定與共用->匯出日曆, say. kpchiaoo@gmail.com.ical.zip
Unzip kpchiaoo@gmail.com.ical.zip, and get NFL2025-xxxx.ics
Edit NFL2025-xxxx.ics, Replace all
"STATUS:CONFIRMED"
to
"STATUS:CANCELLED"
Save it as NFL2025-xxxx-calcelled.ics
Then import NFL2025-xxxx-calcelled.ics back to google calendar, NFL2025-26
Done

2025年8月1日星期五

Spyder 輸入中文

ln -s /usr/lib/x86_64-linux-gnu/qt5/plugins/platforminputcontexts/libfcitxplatforminputcontextplugin.so ~/anaconda3/plugins/platforminputcontexts/

2025年5月23日星期五

Split youtube into chapters

yt-dlp -f 234+602 --split-chapters --yes-playlist https://www.youtube.com/watch?v=p6sGUJUwQp0&t=563s

2025年5月15日星期四

Graphviz dot kernel

cf: https://github.com/laixintao/jupyter-dot-kernel

chiao@kpchiao9600k-2204:~$ . .bashrc_anaconda
(base) chiao@kpchiao9600k-2204:~$ pip install dot_kernel
(base) chiao@kpchiao9600k-2204:~$ install-dot-kernel
Done.
In jupyter lab, open with dot kernel: Launcher -> Dot
Edit the dot source in code cell and run.
Shift right click mouse on image (Yes! need to press Shift key!).
Select "另存圖片" or "在新分頁中開啟圖片"

Open in LibreOffice Draw:

Export dot as svg, say a.svg by
dot -Tsvg -o a.svg a.dot
Insert image a.svg in draw
Right click the image, and select 斷開
All objects can be edited now

2025年4月19日星期六

build libpng12

cf: https://askubuntu.com/questions/1404213/install-libpng12-on-ubuntu-22-04

wget https://ppa.launchpadcontent.net/linuxuprising/libpng12/ubuntu/pool/main/libp/libpng/libpng_1.2.54.orig.tar.xz

tar Jxfv libpng_1.2.54.orig.tar.xz

2025年2月13日星期四

Error upgrading grub-efi-amd64-signed - special device /dev/disk/by-id/nvme-eui.c7e3135c7db8d2da000c296477f694c3-part1 does not exist

cf: https://askubuntu.com/questions/1276111/error-upgrading-grub-efi-amd64-signed-special-device-old-ssd-does-not-exist

sudo mv /var/cache/debconf/config.dat /var/cache/debconf/config_orig.dat

sudo apt upgrade

2025年2月6日星期四

yt-dlp process

List formats:
yt-dlp -F <url>
ID      EXT   RESOLUTION FPS CH │   FILESIZE    TBR PROTO │ VCODEC           VBR ACODEC      ABR ASR MORE INFO
...
244     webm 854x480     30    │ 268.65MiB   891k https │ vp9             891k video only          480p, webm_dash
136     mp4   1280x720    30    │ 695.07MiB 2304k https │ avc1.4d401f    2304k video only          720p, mp4_dash
247     webm 1280x720    30    │ 666.19MiB 2208k https │ vp9            2208k video only          720p, webm_dash
311     mp4   1280x720    60    │ ~ 1.12GiB 3800k m3u8 │ avc1.4D4020    3800k video only
...
Download the desired format: e.g. ID:136
yt-dlp -f 136 <url>
Done
"-------------------------------------------------------------------------------"
echo "If get the message HTTP:403 Forbidden"
echo "update yt-dlp by running:"
echo "sudo yt-dlp -U"
echo "2025-02-07, Chiao"
echo "-------------------------------------------------------------------------------"

2024年12月2日星期一

Change Default Torrent Client for Magnet Links in Ubuntu 24.04 | 22.04

cf: https://ubuntuhandbook.org/index.php/2022/01/default-torrent-app-magnet-links-ubuntu/

Set “QBittorrent” as default app for magnet link, use command:

xdg-mime default org.qbittorrent.qBittorrent.desktop x-scheme-handler/magnet

Or use command:

gio mime x-scheme-handler/magnet org.qbittorrent.qBittorrent.desktop

Check with:

gio mime x-scheme-handler/magnet

x-scheme-handler/magnet」的預設應用程式：org.qbittorrent.qBittorrent.desktop
已註冊的應用程式：
	org.qbittorrent.qBittorrent.desktop
	org.kde.ktorrent.desktop
	transmission-gtk.desktop
建議的應用程式：
	org.qbittorrent.qBittorrent.desktop
	org.kde.ktorrent.desktop
	transmission-gtk.desktop

2024年11月9日星期六

My Book Partition Table (20241110)

Save it between dash lines, e.g. as MyBook_partition_table_210241110_base64_encode.txt.
Convert it back to binary file using:
base64 -d MyBook_partition_table_210241110_base64_encode.txt > MyBook_partition_table_210241110
Recover back partition table with the command:
sgdisk --load-backup=MyBook_partition_table_210241110 /dev/sda

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---------------------------------------------------------------

save partition table

For gpt disk:

sudo sgdisk --backup=MyBook_partition_table_210241110 /dev/sdd

The saved file is not text file. It can be encoded with base64 into a text file.

base64 MyBook_partition_table_210241110_base64 > MyBook_partition_table_210241110_base64_encode.txt

2024年11月8日星期五

Show second on top

gsettings set org.gnome.desktop.interface clock-show-seconds true

2024年11月6日星期三

classicmenu-indicator is not working in 24.04

cf: https://askubuntu.com/questions/1525467/classicmenu-indicator-is-not-working-in-24-04

Comment out line 152:

vim +152

/usr/lib/python3/dist-packages/classicmenu_indicator/cmindicator.py

Add # in front of line.

2024年10月21日星期一

drupal no theme layout show

進入「管理」的「效能」，將最底下的「整合 CSS 檔案」及「整合 Javascript 檔案」unclick ! 即可展現 theme 的 layout

This is used as the value for max-age in Cache-Control headers.

頻寬最佳化

外部資源可自動優化，可以減少網站的檔案大小及請求數量。

整合 CSS 檔案

整合 Javascript 檔案

The followings are from ChatGPT:

5. CSS/JS Aggregation Issues:

Cause: Sometimes, Drupal's CSS/JS aggregation can cause issues, especially during development.
Fix: Disable CSS/JS aggregation temporarily by unchecking the options under Admin > Configuration > Development > Performance.

no hdmi sound

在「系統設定值」中改變「顯示器」的解析度，例如：　1680x1050　即有 hdmi　音效選項了。

可以再改回 1920x1080

2024年10月20日星期日

init_printing(use_unicode=False, wrap_line=False)

update core

cf: https://www.drupal.org/project/drupal/releases/10.2.10

For example, upgrade to core 10.2.10

composer require drupal/core-recommended:10.2.10 drupal/core-composer-scaffold:10.2.10 drupal/core-project-message:10.2.10 --update-with-all-dependencies

2024年9月16日星期一

apt-mark hold packages e.g. kernel

Suppose the kernel version 5.15.0-121 to be held.

dpkg -l linux-* | grep ^ii | grep 5.15.0-121
Will list all the packages installed,
sudo apt-mark hold linux-headers-5.15.0-121 linux-headers-5.15.0-121-generic linux-image-5.15.0-121-generic linux-modules-extra-5.15.0-121-generic
apt-mark showhold
Will list the held packages,e.g
linux-headers-5.15.0-121
linux-headers-5.15.0-121-generic
linux-image-5.15.0-121-generic
linux-modules-extra-5.15.0-121-generic
Done.

2024年9月13日星期五

unzip sql into mysql

gunzip -cv drupal10_from_9_20240914.sql.zip | mysql -v -u chiao -p drupal10_from_9

2024年9月12日星期四

7z split and splice

split:
tar -cf - mydir | 7z a -v1g -mx=9 -mmt=4 -p -si mydir.tar.7z

split files are mydir.tar.7z.001, mydir.tar.7z.002, ...

splice:
7z x -tsplit mydir.tar.7z.001

splce file is mydir.tar

2024年9月9日星期一

for loop

#!/bin/bash

for i in {1..5}

do

echo "Welcome $i times"

done

2024年9月5日星期四

block comments

#!/bin/bash
echo "Something"
: <<MyComments
akldsj
aklsdfj kald'fa
kaldjsf adsf
MyComments

2024年8月16日星期五

apt check auto or manul installed packages pkg

Because 'apt autoremove' will remove the pkgs installed from 'apt install', some old pkgs, eg. some old kernels are for vmware modules updated. can be not removed.

Vmware modules cannot be compiled in the new kernel 6.8.0-40.

cf: https://help.ubuntu.com/community/RemoveOldKernels#GUI_Way

The packages to remove are determined based in part on whether the package is marked as manually or automatically installed. You can check if a kernel providing package is marked as automatically installed using this command in a terminal:

apt-mark showauto 'linux-image-.*'

or to see if it is marked as manually installed:

apt-mark showmanual 'linux-image-.*'

In the event some kernel providing packages are marked as manual (possibly because they were installed via 'apt-get') and you want them autoremoved, you can change the status of the package using apt-mark auto and the package name. For example, to mark kernel 4.12.0-12-generic as autoremovable:

sudo apt-mark auto '^linux-.*-4\.12\.0-12(-generic)?$'

On the contrary, I want some kernels not to be autoremoved. So do this,

sudo apt-mark manual linux-headers-6.5.0-45-generic

sudo apt-mark manual linux-hwe-6.5-headers-6.5.0-45

sudo apt-mark manual linux-image-6.5.0-45-generic

sudo apt-mark manual linux-modules-6.5.0-45-generic

sudo apt-mark manual linux-modules-extra-6.5.0-45-generic

sudo apt-mark manual linux-signatures-nvidia-6.5.0-45-generic

sudo apt-mark manual linux-headers-5.15.0-118
sudo apt-mark manual linux-headers-5.15.0-118-generic
sudo apt-mark manual linux-image-5.15.0-118-generic
sudo apt-mark manual linux-modules-5.15.0-118-generic
sudo apt-mark manual linux-modules-extra-5.15.0-118-generic

2024年8月13日星期二

old firefox profile to new firefox

cf: https://www.dedoimedo.com/computers/firefox-old-profile-reuse.html

Because, firefox not allow using profile of old version, we can solve it as follows.

cp old profile to firefox user directory, say, /home/chiao/snap/firefox/common/.mozilla/
In terminal, run:
MOZ_ALLOW_DOWNGRADE=1 firefox -P
close firefox and open firefox (no need in terminal)
Done

2024年8月12日星期一

Stuck at "press Ctrl-c to cancel the checks in progress on the filesystem"

Check /etc/fstab. Some line might cause this problem. For example, if some partition is deleted, but it is still in fstab, then ubuntu is keeping checking such non-exist partition.

2024年6月26日星期三

id and id $USER show different groups

I set my primary group as root in /etc/passwd, and I always do this when install a new system. I also add myself to other groups,eg. sudo, lp, dialout ... However, the id only shows I am in root group and no other groups shown.

So I change my primary group from root to chiao voila the problem is solved! The id and id chiao show the same groups. Futhermore, I can use thonny directly.

2024年6月24日星期一

pico w micropython custom module

The custom module, say my.py, must be saved in pico w rather than computer. Otherwisr, micropython will complain not find import module.

I think this is due to the runtime module must be imported from pico w device.

2024年5月20日星期一

gpio BCM and BOARD mode

GPIO.setmode(GPIO.BOARD)
pin numbers are as in board,1,2...40 sequentially.
GPIO.setmode(GPIO.BCM)
pin numbers are as defined names as GPIO 14, GPIO 15 ...
For example, pin 16 in BOARD mode is the pin GPIO 23 in BCM mode

gpio output vs input

cf: https://electronics.stackexchange.com/questions/534268/difference-between-low-output-gpio-and-input-gpio

An output pin that is set high can push out (source) current, or when set low it can pull in (sink) current. An input does neither, it ideally needs no current to flow to sense if the input is high or low.

2024年5月9日星期四

fcitx 4 add boshiamy

sudo apt install fcitx-tools fcitx-table-boshiamy
fcitx 設定法設定 add 嘸蝦米
For my own codes, run:
#!/bin/bash
txt2mb boshiamy_my.txt boshiamy_my.mb
cp -f boshiamy_my.mb /home/chiao/.config/fcitx/table/
sudo cp -f boshiamy_my.mb /usr/share/fcitx/table/
cd /home/chiao/.config/fcitx/table
ln -sf boshiamy_my.mb boshiamy.mb
cd /usr/share/fcitx/table/
sudo ln -fs boshiamy_my.mb boshiamy.mb
echo ""
echo " Restart fcitx "
echo ""

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效能

5. CSS/JS Aggregation Issues:

2024年10月20日 星期日

2024年9月16日 星期一

2024年9月13日 星期五

2024年9月12日 星期四

2024年9月9日 星期一

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關於我自己

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