Raspberry pi 3 with node-red

hi everyone, i am using raspberry pi 3 to use node red, but when i start node red the console shows these errors:

node-red.service: Failed to determine user credentials: No such process
node-red.service: Failed at step USER spawning/usr/bin/env: No such process

Thanks for your help

Hi Bomber,

Welcome to the Nodered forum.
How did you installed nr on your pi?
Did you used the installation script as mentioned on this page.


yes, but it doesn't work

thank you

In a terminal run
node-red-start (note: not node-red start)
and copy/paste the full output here please. Copy/paste, not a screenshot. Use the </> button at the top of the forum entry window when pasting it.

Also, have you changed the user name on the pi since you installed node-red? If so then run the script again when logged in as the new user name.

Hi Colin,

unfortunately out of desperation I installed everything,
and the errors never come out.
the problem is that I can't connect to the network to nod red,
i saw that there is a npm WARN config global --global, --local are deprecated. Use --location=global instead. nodes to local could that be the problem?
how can i solve?
thank you

 This can take 20-30 minutes on the slower Pi versions - please wait.

Stop Node-RED ✔
Remove old version of Node-RED ✔
Node option not specified : --node14, --node16, or --node18
Leave existing Node.js : v16.16.0 Npm 8.11.0
Clean npm cache -
npm WARN config global `--global`, `--local` are deprecated. Use `--location=global` instead. nodes to local
Install Node-RED core ✔ 3.0.0
Move global nodes to local -
Leave existing nodes -
Install extra Pi nodes ✔
Add shortcut commands ✔
Update systemd script ✔
Any errors will be logged to /var/log/nodered-install.log

All done.
You can now start Node-RED with the command node-red-start
or using the icon under Menu / Programming / Node-RED
Then point your browser to localhost:1880 or http://{your_pi_ip-address}:1880

Started : mer 20 lug 2022, 10:07:59, CEST
Finished: mer 20 lug 2022, 10:09:53, CEST

Start Node-RED

Once Node-RED has started, point a browser at
On Pi Node-RED works better with the Firefox or Chrome browser

Use node-red-stop to stop Node-RED
Use node-red-start to start Node-RED again
Use node-red-log to view the recent log output
Use sudo systemctl enable nodered.service to autostart Node-RED at every boot
Use sudo systemctl disable nodered.service to disable autostart on boot

To find more nodes and example flows - go to http://flows.nodered.org

Starting as a systemd service.
20 Jul 10:16:10 - [info]
Welcome to Node-RED
20 Jul 10:16:10 - [info] Node-RED version: v3.0.0
20 Jul 10:16:10 - [info] Node.js version: v16.16.0
20 Jul 10:16:10 - [info] Linux 5.15.32-v8+ arm64 LE
20 Jul 10:16:13 - [info] Loading palette nodes
20 Jul 10:16:18 - [info] Settings file : /home/simo/.node-red/settings.js
20 Jul 10:16:18 - [info] Context store : 'default' [module=memory]
20 Jul 10:16:18 - [info] User directory : /home/simo/.node-red
20 Jul 10:16:18 - [warn] Projects disabled : editorTheme.projects.enabled=false
20 Jul 10:16:18 - [info] Flows file : /home/simo/.node-red/flows.json
20 Jul 10:16:18 - [info] Creating new flow file
20 Jul 10:16:18 - [warn]
Your flow credentials file is encrypted using a system-generated key.
If the system-generated key is lost for any reason, your credentials
file will not be recoverable, you will have to delete it and re-enter
your credentials.
You should set your own key using the 'credentialSecret' option in
your settings file. Node-RED will then re-encrypt your credentials
file using your chosen key the next time you deploy a change.
20 Jul 10:16:18 - [warn] Encrypted credentials not found
20 Jul 10:16:18 - [info] Starting flows
20 Jul 10:16:18 - [info] Started flows
20 Jul 10:16:18 - [info] Server now running at

That is just a warning and can be ignored.

ok solved, i was wrong ip address
excuse me
thanks for everything

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