How to disable the touchpad?

It displays all the input devices connected. Note that they all have an id. 
Run the following command in a terminal:

xinput list

It displays all the input devices connected. Note that they all have an id. Now use the id to disable it.

xinput set-prop 12 "Device Enabled" 0

https://askubuntu.com/questions/65951/how-to-disable-the-touchpad

uninstall of installed files with ./configure,make,make install

How to uninstall files that have been installed with the combination of commands:
./configure,make,make install

To find out where the files are located, you run the command:
make -n install

Information about packages

Commands to get information about packages:

type -p nmcli

dpkg -S /usr/bin/nmcli

apt-cache depends network-manager

https://askubuntu.com/questions/972596/nmcli-command-not-found-ubuntu-16-04

Autostart programs at bootup

home/name/.config/autostart

Here it is where you place the programs that you want to start at bootup.

 [Desktop Entry]
Type=Application
Exec=/usr/share/terminator/terminator
Hidden=false
NoDisplay=false
X-GNOME-Autostart-enabled=true
Name[en_US]=terminator
Name=terminator
Comment[en_US]=
Comment=

When you do “apt-get install” where are the .deb files stored?

They're stored in:

/var/cache/apt/archives/

unless you've issued a:

apt-get clean

(https://superuser.com/questions/378686/when-you-do-apt-get-install-where-are-the-deb-files-stored)

Deletion of make install files

Deletion of make install files

https://stackoverflow.com/questions/1439950/whats-the-opposite-of-make-install-i-e-how-do-you-uninstall-a-li

sudo make uninstall

In a Debian based system, instead of (or after*) doing make install you can run sudo checkinstall to make a .deb file that gets automatically installed. You can then remove it using the system package manager (e.g. apt/synaptic/aptitude/dpkg). Checkinstall also supports creating other types of package, e.g. RPM.

Using Google Sheets to translate batches of words

GOOGLETRANSLATE(a2, "en", "es")

Reddit link