# Node-red opened and closed

**URL:** <https://discourse.nodered.org/t/node-red-opened-and-closed/4621>\
**Category:** General\
**Created:** [6 November 2018 23:15 UTC](https://discourse.nodered.org/t/node-red-opened-and-closed/4621 "2018-11-06T23:15:18Z")\
**Posts on this page:** 10\
**Page:** 1

<div class="post-metadata">

**Author:** ![gomju](https://avatars.discourse-cdn.com/v4/letter/g/f4b2a3/32.png) [@gomju](https://discourse.nodered.org/u/gomju)\
**Post date:** [6 November 2018 23:15 UTC](https://discourse.nodered.org/t/node-red-opened-and-closed/4621/1 "2018-11-06T23:15:18Z")

</div>

Hello. I am starting with node-red but I have a problem. I can´t run it.  
I have followed some tutorials and installed it as the official page says but i don´t know what happens.  
When I type node-red start then everything seems good but then appears this message continuosly:

pam\_unix(sudo:session): session opened for user root by (uid=0)  
pam\_unix(sudo:session): session closed for user root  
pi : TTY=unknown ; PWD=/home/pi ; USER=root ; COMMAND=/usr/bin/phyton -u /home/pi.node-red/node\_modules/node-red-node-pi-sense-hat/sensehat.py

# pam\_unix(sudo:session): session opened for user root by (uid=0)

pam\_unix(sudo:session): session closed for user root  
and so on.......

What is wrong ?

Last i did was to execute the script

```auto
bash <(curl -sL https://raw.githubusercontent.com/node-red/raspbian-deb-package/master/resources/update-nodejs-and-nodered)
´´´´

thanks for your help.
```

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<div class="post-metadata">

**Author:** ![zenofmud](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/zenofmud/32/316_2.png) [@zenofmud](https://discourse.nodered.org/u/zenofmud)\
**Post date:** [7 November 2018 00:29 UTC](https://discourse.nodered.org/t/node-red-opened-and-closed/4621/2 "2018-11-07T00:29:16Z")

</div>

What platform are you running on?  
To start NR are you typing `node-red start` ? or '`node-red-start`?

Please copy the log from when NR starts to when you see those messages and paste it into a response.

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**Author:** ![craigcurtin](https://avatars.discourse-cdn.com/v4/letter/c/94ad74/32.png) [@craigcurtin](https://discourse.nodered.org/u/craigcurtin)\
**Post date:** [7 November 2018 03:25 UTC](https://discourse.nodered.org/t/node-red-opened-and-closed/4621/3 "2018-11-07T03:25:44Z")

</div>

There is something weird with your command line

COMMAND=/usr/bin/phyton -u /home/pi.node-red/node\_modules/node-red-node-pi-sense-hat/sensehat.py

Python is spelt incorrectly in the path

Craig

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<div class="post-metadata">

**Author:** ![gomju](https://avatars.discourse-cdn.com/v4/letter/g/f4b2a3/32.png) [@gomju](https://discourse.nodered.org/u/gomju)\
**Post date:** [7 November 2018 22:44 UTC](https://discourse.nodered.org/t/node-red-opened-and-closed/4621/4 "2018-11-07T22:44:22Z")

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hello and thanks for your fast answer.  
This is what appears on the screen

pi@raspberrypi:~ $ node-red-start

Start Node-RED

Once Node-RED has started, point a browser at [http://192.168.1.118:1880](http://192.168.1.118:1880)  
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](http://flows.nodered.org)

# Starting as a systemd service. Started Node-RED graphical event wiring tool. 7 Nov 23:42:36 - [info] Welcome to Node-RED

## 7 Nov 23:42:36 - [info] Node-RED version: v0.19.5 7 Nov 23:42:36 - [info] Node.js version: v8.12.0 7 Nov 23:42:36 - [info] Linux 4.14.71-v7+ arm LE 7 Nov 23:42:37 - [info] Loading palette nodes 7 Nov 23:42:43 - [info] Dashboard version 2.10.1 started at /ui 7 Nov 23:42:44 - [info] Settings file : /home/pi/.node-red/settings.js 7 Nov 23:42:44 - [info] Context store : 'default' [module=memory] 7 Nov 23:42:44 - [info] User directory : /home/pi/.node-red 7 Nov 23:42:44 - [warn] Projects disabled : editorTheme.projects.enabled=false 7 Nov 23:42:44 - [info] Flows file : /home/pi/.node-red/flows\_raspberrypi.json 7 Nov 23:42:44 - [info] Server now running at [http://127.0.0.1:1880/](http://127.0.0.1:1880/) 7 Nov 23:42:44 - [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.

7 Nov 23:42:44 - [info] Starting flows  
7 Nov 23:42:44 - [info] Started flows  
pi : TTY=unknown ; PWD=/home/pi ; USER=root ; COMMAND=/usr/bin/python -u /home/pi/.node-red/node\_modules/node-red-node-pi-sense-hat/sensehat.py  
pam\_unix(sudo:session): session opened for user root by (uid=0)  
pam\_unix(sudo:session): session closed for user root

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<div class="post-metadata">

**Author:** ![gomju](https://avatars.discourse-cdn.com/v4/letter/g/f4b2a3/32.png) [@gomju](https://discourse.nodered.org/u/gomju)\
**Post date:** [7 November 2018 22:46 UTC](https://discourse.nodered.org/t/node-red-opened-and-closed/4621/5 "2018-11-07T22:46:18Z")

</div>

hello and thanks for your fast answer.  
As you said, I spellt the word in the wrong way.  
Python is correct.

pam\_unix(sudo:session): session opened for user root by (uid=0)  
pam\_unix(sudo:session): session closed for user root  
pi : TTY=unknown ; PWD=/home/pi ; USER=root ; COMMAND=/usr/bin/python -u /home/pi/.node-red/node\_modules/node-red-node-pi-sense-hat/sensehat.py

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<div class="post-metadata">

**Author:** ![zenofmud](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/zenofmud/32/316_2.png) [@zenofmud](https://discourse.nodered.org/u/zenofmud)\
**Post date:** [8 November 2018 00:15 UTC](https://discourse.nodered.org/t/node-red-opened-and-closed/4621/6 "2018-11-08T00:15:45Z")

</div>

Ok, so NR is starting fine, and it looks like you have a node that when it runs it opens a session and closing it when it is done.

Is there a problem?

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<div class="post-metadata">

**Author:** ![Reyner](https://avatars.discourse-cdn.com/v4/letter/r/34f0e0/32.png) [@Reyner](https://discourse.nodered.org/u/Reyner)\
**Post date:** [4 August 2021 06:39 UTC](https://discourse.nodered.org/t/node-red-opened-and-closed/4621/7 "2021-08-04T06:39:06Z")

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Hi there, I know this post is over 2 years ago, but right now I am having the same problem as you do. My Node Red Log is as following:

```auto
4 Aug 13:38:10 - [info] Starting flows
4 Aug 13:38:11 - [info] Started flows
      pi : TTY=unknown ; PWD=/home/pi ; USER=root ; COMMAND=/usr/bin/python mist.py 1628059091576
pam_unix(sudo:session): session opened for user root by (uid=0)
      pi : TTY=unknown ; PWD=/home/pi ; USER=root ; COMMAND=/usr/bin/python fan.py 1628059091576
pam_unix(sudo:session): session opened for user root by (uid=0)
pam_unix(sudo:session): session closed for user root
      pi : TTY=unknown ; PWD=/home/pi ; USER=root ; COMMAND=/usr/bin/python bme280_humid.py 1628059091852
pam_unix(sudo:session): session opened for user root by (uid=0)
      pi : TTY=unknown ; PWD=/home/pi ; USER=root ; COMMAND=/usr/bin/python bme280.py 1628059091852
pam_unix(sudo:session): session opened for user root by (uid=0)
pam_unix(sudo:session): session closed for user root
pam_unix(sudo:session): session closed for user root
4 Aug 13:38:12 - [info] [mqtt-broker:4d8478fc.0ef098] Connected to broker: mqtt://broker.hivemq.com:1883
      pi : TTY=unknown ; PWD=/home/pi ; USER=root ; COMMAND=/usr/bin/python mist.py 1628059092075
pam_unix(sudo:session): session opened for user root by (uid=0)
      pi : TTY=unknown ; PWD=/home/pi ; USER=root ; COMMAND=/usr/bin/python fan.py 1628059092075
pam_unix(sudo:session): session opened for user root by (uid=0)
      pi : TTY=unknown ; PWD=/home/pi ; USER=root ; COMMAND=/usr/bin/python timelapse.py 1628059092113
pam_unix(sudo:session): session opened for user root by (uid=0)
pam_unix(sudo:session): session closed for user root
pam_unix(sudo:session): session closed for user root
pam_unix(sudo:session): session closed for user root

```

How do you handle this issue sir? Thanks

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<div class="post-metadata">

**Author:** ![knolleary](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/knolleary/32/3_2.png) [@knolleary](https://discourse.nodered.org/u/knolleary)\
**Post date:** [4 August 2021 07:11 UTC](https://discourse.nodered.org/t/node-red-opened-and-closed/4621/8 "2021-08-04T07:11:07Z")

</div>

What actual problem are you having? Is something not working in your flows? Those log messages suggest you are using the exec node using sudo... Or at least something is running commands with sudo.

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<div class="post-metadata">

**Author:** ![zenofmud](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/zenofmud/32/316_2.png) [@zenofmud](https://discourse.nodered.org/u/zenofmud)\
**Post date:** [4 August 2021 11:49 UTC](https://discourse.nodered.org/t/node-red-opened-and-closed/4621/9 "2021-08-04T11:49:31Z")

</div>

Since this thread is almost 3 years old, I'm going to close it and ask you to open a new thread.

Please provide a copy of the NR log from starting up so we can see the versions of NR and nodes  
also please explain why you are running as root and what you are trying to do.

Thank you

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<div class="post-metadata">

**Author:** ![zenofmud](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/zenofmud/32/316_2.png) [@zenofmud](https://discourse.nodered.org/u/zenofmud)\
**Post date:** [4 August 2021 11:49 UTC](https://discourse.nodered.org/t/node-red-opened-and-closed/4621/10 "2021-08-04T11:49:41Z")

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