Make Ubuntu slightly more Elementary OS :-)

elementarize-ubuntu.sh

sudo add-apt-repository ppa:elementary-os/daily
sudo apt install -qy io.elementary.sound-theme pantheon-files pantheon-terminal

# Disable sounds events
# gsettings set org.gnome.desktop.sound event-sounds false
gsettings set org.gnome.desktop.sound theme-name elementary

# Don't show icons on the desktop
# gsettings set org.gnome.desktop.background show-desktop-icons false

# Set Elementary OS Files as default file browser
sudo xdg-mime default io.elementary.files.desktop inode/directory application/x-gnome-saved-search
sudo xdg-mime default io.elementary.files.desktop  $(grep MimeType /usr/share/applications/io.elementary.files.desktop | sed 's/MimeType=//' | sed 's/;/ /g')

# Revert by executing:
# sudo xdg-mime default org.gnome.Nautilus.desktop inode/directory application/x-gnome-saved-search
# sudo xdg-mime default org.gnome.Nautilus.desktop  $(grep MimeType /usr/share/applications/org.gnome.Nautilus.desktop | sed 's/MimeType=//' | sed 's/;/ /g')

# Disable single click opening in Elementary OS Files
gsettings set io.elementary.files.preferences single-click false
gsettings set io.elementary.files.preferences confirm-trash false

# Start setting Elementary OS Terminal as default terminal
sudo update-alternatives --config x-terminal-emulator

# Disable so-called natural copy
gsettings set io.elementary.terminal.settings natural-copy-paste false
gsettings set io.elementary.terminal.settings unsafe-paste-alert false
gsettings set io.elementary.terminal.settings remember-tabs false
gsettings set io.elementary.terminal.saved-state window-width '1280'
gsettings set io.elementary.terminal.saved-state window-height '900'
# OR search dor 'natural-copy-paste' and change it to false
# sudo nano +88 /usr/share/glib-2.0/schemas/io.elementary.terminal.gschema.xml