Raspberry Pi Notes

This page is a repository for notes, bug fixes, and other observations  associated with Raspberry Pi computers.

Installing Node Red

The best location for the installer is here. You can suffix the command with the version of Node that want, but be careful. V12 seems to be OK but 16 and 18 can seriously mess with your system as detailed here. If you see lines like:
sudo: /usr/bin/sudo must be owned by uid 0 and have the setuid bit set
Then you’ve been bitten.

Node Red Starts Slowly

If your installation sometimes hangs at Node Red start-up for about 5 minutes, you may have the problem described here.  It only seems to happen on the first run after booting, and It could be that it’s stuck trying to read from e.g. /dev/urandom.To fix this install the following package:
sudo apt-get install rng-tools