PC hacks

For people who find the sound only in left earphone irritating, you can try the following- On Android, go to setting, accessibility, mono audio. Exact path may vary depending on Android version, but it is there in recent ones. On ipados 13, go to setting, accessibility, audio/visual, mono audio

Ubuntu on windows

sudo apt-get install gcc //To update ubuntu

GNU plot on windows

p 'plot.txt' using 1:2 //to get a 2d plot from text file in which first column is used as 1st axis and 2nd column 2nd.

splot 'plot.txt' using 1:2:3 //surface plot with x, y , z data. gnuplot> set hidden3d //To get nice surface plot without points but actual surface. gnuplot> set dgrid3d 50,50 qnorm 2 gnuplot> splot 'data_file' with lines

Generate pdf thumbnail

Install genuine adobe acrobat reader. Go to edit, preferences, general, thumbnail. Also, go to control panel, set 'view by' on upper right side to large icons, find file explorer options, go to view, then set show thumbnail, and not icon. apply. If the files don't load, open acrobat, open file, go to pdf files and do large icon view. Thumbnails will generate. IF THE THUMBNAILS ARE WRONG, CLEAR CACHE. Search for disk cleanup, choose c drive, and clean only the thumbnail caches.

Download youtube videos

(but only when your life depends upon it. Downloading youtube videos is unethical, and this blog does not endorse it)

Use: youtube-dl

Download youtube-dl from github.

in cmd line, go to the youtube-dl directory. ALWAYS go to this folder to execute programs. type youtube-dl then give a space, and paste the link. youtube-dl -U for update To use options for download, just leave a space after youtube-dl and type the code for the option, then leave a space, and then paste the link. press shift enter.

Speed up a youtube video by an amount larger than 2x.

press ctrl + shift +j paste following command, with x replaced with teh speed you want. press enter document.getElementsByTagName("video")[0].playbackRate = x press ctrl + shift +j

Most economical export method from goodnotes

is flatened, with background. Handwriting recognision makes no difference.
If you make it editable, for pure notes, the file size becomes 10 times! Using blank background actually increases the file size.

gmail mail bulk delete code.

Your Gmail occupies space. If you want to free up space in bulk, search the following on gmail.

has:attachment larger:10mb

OR

Size:5m