buffering

concerning stdio functions:
write to file is buffered (does not react on \n)
write to terminal is line-buffered (autoflushes on \n)
http://www.pixelbeat.org/programming/stdio_buffering/

TUGboat

https://www.dropbox.com/s/97e68ke8saq1rwk/tugboat.cmn https://www.dropbox.com/s/c916gz2j01nll57/tugboat.sty

Мухоловка

https://pikabu.ru/story/kak_izbavitsya_ot_mukh_na_dache_avstraliyskaya_mukholovka_svoimi_rukami_6003652

usb on notebook

SET CONTROL LINE STATE comes before SET LINE CODING, but it must not come at all on connection stage. See if the following allows to avoid the SET CONTROL LINE STATE, or the cause is in the driver: Try "systemctl stop ModemManager[.service]", but first find modemmanager via "ps" and after stopping ensure that it disappeared. If "systemctl ..." does not work, google how to stop modemmanager in ubuntu

Soldering iron

https://www.explainthatstuff.com/heating-elements.html

Oscilloscope (TODO: see which power supply and order it)

https://www.youtube.com/watch?v=d7aWz98CHzM