How to debug or test python scripts using inspect module and print and input?

https://stackoverflow.com/questions/3056048/filename-and-line-number-of-python-script

At the top of your script, 

from inspect import currentframe, getframeinfo

At the spot where you want to print the value of a variable,

print(f'Line #{getframeinfo(currentframe()).lineno}:\nDescription:\n{varName}\nEnd of Description\n')

input()

Is there an easier way to reselect the previous selection?

https://www.reddit.com/r/vim/comments/6v4i4u/is_there_an_easier_way_to_reselect_the_previous/

In normal mode, you can use gv to re-select the previous visual selection.

If you just want to re-issue an additional ex command over the same range, you can use * on the command line, as long as "*" isn't in your 'cpoptions' setting.

:'<,'>s/foo/bar/g
:*s/baz/bat/g
:help cpo-star
:help :*
:help v_:

How to View Free Disk Space and Disk Usage From the Linux Terminal

https://www.howtogeek.com/409611/how-to-view-free-disk-space-and-disk-usage-from-the-linux-terminal/

How to update Google Chrome on Ubuntu?

$ apt-get update

$ apt-get --only-upgrade install google-chrome-stable

How to renew ip address in Ubuntu

How to renew ip address in Ubuntu?

$ dhclient -r

$ dhclient

.dav video files | play | convert to .mp4 | concatenate .mp4 files

1. How to play .dav video files?

Wondershare UniConverter

2. How to convert .dav files into .mp4 files?

>ffmpeg -y -i input-file.dav -c:v libx264 -crf 24 output-file.mp4

3. How to concatenate .mp4 files?

For Linux:

$ cat mylist.txt
file '/path/to/file1'
file '/path/to/file2'
file '/path/to/file3'
    
$ ffmpeg -f concat -safe 0 -i mylist.txt -c copy output.mp4

For Windows:

(echo file 'first file.mp4' & echo file 'second file.mp4' )>list.txt
ffmpeg -safe 0 -f concat -i list.txt -c copy output.mp4

How to track number of clicks on a banner on a web page?

https://instapage.com/blog/banner-ad-tracking

https://instapage.com/blog/utm-parameters

https://ga-dev-tools.web.app/campaign-url-builder/

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Google auto-tagging (need pay)

Google manual-tagging

https://support.google.com/tagmanager/answer/6106716?hl=en