Is there a way to check if a named program is currently running on an RPi? I am currently running my RPi headless with a VNC server over LAN to initiate the program and check it from time to time when I'm at home.
Now, I have SSH access to my device from anywhere and I wish to see if my script is running. Is there a way to do it?
Also is it possible to see the print values of that script running in the terminal?
The program runs on Raspbian OS on RPi 3.
Thanks!
@SteveRobillard answered my question in the comments. I will re-iterate it here for everyone to see clearly!
1. Viewing running programs:
In the terminal type: ps aux | grep programname
ps = display currently running processes
a = show processes for all users
u = display the process' user/owner
x = show processes not attached to a terminal
grep = search for a name of the process (i.e. programname)
2. Viewing the currently open terminal session over SSH.
Use tmux or screen. I used tmux and followed instructions provided in the blog run by @jacob001 and @SteveRobillard: https://raspberrypise.tumblr.com/post/141348857424/tmux-101-installing-from-source.
Once tmux was installed, as per installation guide, I tested it by running my program through it on my RPi. Then I connected to the RPi remotely via SSH using my laptop (I used weaved.com service in this case). Once connected, I typed tmux in the terminal to run it and a new session opened. Subsequently, I typed CTRL-B then ( to switch to the previous session (the one I initialized earlier on my RPi). And voilà, this way I could access live program's output (printed sensor values) remotely!
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