# Error with exec command fired from Node-Red
**URL:** https://discourse.nodered.org/t/error-with-exec-command-fired-from-node-red/66293
**Category:** General
**Created:** [10 August 2022 15:57 UTC](https://discourse.nodered.org/t/error-with-exec-command-fired-from-node-red/66293 "2022-08-10T15:57:18Z")
**Posts on this page:** 7
**Page:** 1
### Author:  [@Tapani](https://discourse.nodered.org/u/Tapani)
#### Post date: [10 August 2022 15:57 UTC](https://discourse.nodered.org/t/error-with-exec-command-fired-from-node-red/66293/1 "2022-08-10T15:57:18Z")
I’m running Node-Red with Home Assistant on Raspberry Pi.
From Node-Red I fire the the following command:
‘echo ds2482 0x18 \> /sys/bus/i2c/devices/i2c-1/new\_device’
to initialise 1-wire reading.
Earlier this was working without errors but now I get the following error message:
/bin/bash: line 1: /sys/bus/i2c/devices/i2c-1/new\_device: “Read-only file system”
If I run
‘echo ds2482 0x18 \> /sys/bus/i2c/devices/i2c-1/new\_device’
from the terminal, it works just fine.
The problem has started rather recently but I don’t know which operating system or Home Assistant or Node-Red version has starting to make this error.
The problem seems to be related with file-access rights.
Any explanation?
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### Author:  [@Colin](https://discourse.nodered.org/u/Colin)
#### Post date: [10 August 2022 16:18 UTC](https://discourse.nodered.org/t/error-with-exec-command-fired-from-node-red/66293/2 "2022-08-10T16:18:37Z")
In HA does node red run inside a docker container? If so then if you run that command in a terminal inside the container does it work?
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### Author:  [@Tapani](https://discourse.nodered.org/u/Tapani)
#### Post date: [10 August 2022 16:29 UTC](https://discourse.nodered.org/t/error-with-exec-command-fired-from-node-red/66293/3 "2022-08-10T16:29:38Z")
Node-Red has been installed as HA add-on. I'm not an expert but I believe that HA and also the add-ons are run in a docker container.
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### Author:  [@Colin](https://discourse.nodered.org/u/Colin)
#### Post date: [10 August 2022 16:37 UTC](https://discourse.nodered.org/t/error-with-exec-command-fired-from-node-red/66293/4 "2022-08-10T16:37:07Z")
So does the command work if you run it in a terminal inside the container. I don't know much about docker so you may have to google to find how to run a terminal in the container if you don't know. I generally avoid Docker (and HA).
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### Author:  [@Tapani](https://discourse.nodered.org/u/Tapani)
#### Post date: [10 August 2022 16:41 UTC](https://discourse.nodered.org/t/error-with-exec-command-fired-from-node-red/66293/5 "2022-08-10T16:41:57Z")
I'm using the very standard installation available on HA web pages.
As I wrote in the original message, everything worked fine earlier but something
has been changed in some of the recent updates.
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### Author:  [@Colin](https://discourse.nodered.org/u/Colin)
#### Post date: [10 August 2022 16:47 UTC](https://discourse.nodered.org/t/error-with-exec-command-fired-from-node-red/66293/6 "2022-08-10T16:47:29Z")
You might be best to ask on an HA forum then.
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### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [9 October 2022 16:47 UTC](https://discourse.nodered.org/t/error-with-exec-command-fired-from-node-red/66293/7 "2022-10-09T16:47:42Z")
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