Auto Orientation plugin:
https://marketplace.ultimaker.com/app/cura/plugins/nallath/OrientationPlugin

Various plugins:
https://all3dp.com/2/best-cura-plugins/

Use cura as slicer (win/mac/linux) https://ultimaker.com/software/ultimaker-cura
- Install Cura autorotation and octoprint plugins https://marketplace.ultimaker.com/app/cura/plugins/fieldofview/OctoPrintPlugin

Plugins: CustomSupports, CustomSupportCylinder, OctoPrintPlugin, Auto-Orientation

Cura Icon.png

sudo mkdir /opt/cura
sudo chown $USER:users /opt/cura
sudo chmod 775 /opt/cura
mv ~/Downloads/UltiMaker*.AppImage /opt/cura
chmod 775 /opt/cura/UltiMaker*.AppImage

#download and copy cura icon to /opt/cura
cat >>> .local/share/applications/ultimaker-cura.desktop << EOF
[Desktop Entry]
Name=Ultimaker Cura
Exec=/opt/cura/UltiMaker-Cura-5.3.0-linux-modern.AppImage
Comment=
Terminal=false
Icon=/opt/cura/cura-icon-6.png
Type=Application
MimeType=model/stl;
Categories=Graphics;Application;Other;
EOF
echo "model/stl=ultimaker-cura.desktop;" >> .local/share/applications/mimeapps.list
echo "model/stl=ultimaker-cura.desktop;" >> .local/share/applications/mimeinfo.cache

You can disable the USB Printing part of Cura and it will no longer touch your USB ports, causing issues with Octoprint on the same system.

• Go to “Marketplace”
• Go to the “Installed” tab
• Scroll down to “USB Printing”
• Uncheck the checkbox in front of it
• Restart Cura