Command line to stop MM

[l951b951]

I ran it from ~/MagicMirror so I was in the directory. and all I typed was npm start.

My problem is that I want to be able to fire a script after a set time to stop the Magic Mirror. My goal is to attach a PIR motion sensor, and when someone comes close start the magic mirror, and after a few minutes with no motion, stop Magic Mirror and run another script. Maybe that helps understand my intent.

[l951b951]

@sdetweil said in Command line to stop MM:

ps aux | grep node | grep -v “color” | awk ‘{print $2}’ | xargs sudo kill -9

Thank you for that. It worked, but gives me this: is it safe to ignore these warnings?

./run-start.sh: line 67:  3306 Killed                  electron js/electron.js $1
npm ERR! code ELIFECYCLE
npm ERR! errno 137
npm ERR! magicmirror@2.10.1 start: `./run-start.sh`
npm ERR! Exit status 137
npm ERR! 
npm ERR! Failed at the magicmirror@2.10.1 start script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /home/pi/.npm/_logs/2020-02-03T20_03_35_641Z-debug.log

[sdetweil]

@l951b951 yes.,… if you start mm like this

npm start >/dev/null 2>&1

you won’t get any messages

that means
send all stdout to /dev/null ( >/dev/null)
and send stderr to the same place as stdout (2>&1)

[l951b951]

Thank you, that combination is doing what I need it to do.

I’m marking this as solved, but I’d love to see a breakdown of what

ps aux | grep node | grep -v "color"  | awk '{print $2}' | xargs sudo kill -9

is doing exactly?

[sdetweil]

@l951b951

list all the processes , one per line

ps aux

of that list get all lines that have the word ‘node’

grep node

of that list get all lines that DO NOT have the word color

grep -v “color”

use awk to print just the process number (second space separated token) from each line

awk ‘{print $2}’

and the use sudo kill -9 to kill it, passing the process number using xargs

xargs sudo kill -9 ???

you can do each as one step
ps aux (partial list)

pi         922  0.0  0.4   6176  4208 pts/0    Ss   Feb01   0:01 -bash
root     14676  0.0  0.0      0     0 ?        I<   12:34   0:00 [kworker/2:0H]
pi       15250  0.0  0.2   4628  2644 ?        Ss   13:55   0:00 bash /home/pi/MagicMirror/run-start.sh
pi       15263  0.0  3.0  86264 28752 ?        Sl   13:55   0:00 node node_modules/.bin/electron js/electron.js
pi       15274 15.7 12.0 438576 113952 ?       Sl   13:55   5:24 /home/pi/MagicMirror/node_modules/electron/dist/electron js/electron.js
pi       15276  0.0  2.7 134932 26392 ?        S    13:55   0:00 /home/pi/MagicMirror/node_modules/electron/dist/electron --type=zygote --no-sandbox
pi       15311  8.2 10.8 342876 103308 ?       Sl   13:55   2:49 /home/pi/MagicMirror/node_modules/electron/dist/electron --type=renderer --autoplay-po
pi       15318  0.0  6.0 282764 57060 ?        Sl   13:55   0:00 /home/pi/MagicMirror/n pu-process --no-sandbox --gpu-preferences=KAAAAAAAAACAAACAAQAAA
root     15351  0.0  0.0      0     0 ?        I    13:55   0:00 [kworker/3:2-eve]

with grep node

pi@raspberrypi:~ $ ps aux | grep node
pi       15263  0.0  3.0  86264 28752 ?        Sl   13:55   0:00 node node_modules/.bin/electron js/electron.js
pi       15274 15.6 11.4 433072 108780 ?       Sl   13:55   5:29 /home/pi/MagicMirror/node_modules/electron/dist/electron js/electron.js
pi       15276  0.0  2.7 134932 26392 ?        S    13:55   0:00 /home/pi/MagicMirror/node_modules/electron/dist/electron --type=zygote --no-sandbox
pi       15311  8.2 10.3 337372 97832 ?        Sl   13:55   2:52 /home/pi/MagicMirror/node_modules/electron/dist/electron --type=renderer --autoplay-policy=no-user-gesture-required --no-sandbox --service-pipe-token=E75C637B69C4371629AED884ECD5DCA7 --lang=en-US --app-path=/home/pi/MagicMirror/node_modules/electron/dist/resources/default_app.asar --node-integration=false --webview-tag=false --no-sandbox --background-color=#000000 --num-raster-threads=2 --enable-main-frame-before-activation --enable-compositor-image-animations --service-request-channel-token=E75C637B69C4371629AED884ECD5DCA7 --renderer-client-id=3 --shared-files=v8_context_snapshot_data:100,v8_natives_data:101
pi       15546  0.0  0.0   4372   572 pts/0    S+   14:30   0:00 grep --color=auto node

etc

[sdetweil]

ps --help a

will show all the options for listing running processes