Putting Call Sign on Raspberry Pi Zero WH

[GMW1988]

I still learning many things about Linux. I was able to connect my Raspberry Pi Zero to my WIFI and perform an update. However, I was not able to edit the file to edit my own Call Sign on it. What are the steps to edit the file "CubeSatSim/sim.cfg". I typed CubeSatSim/sim.cfg and I get a response of this is bad command.
Thanks
Gregory

[alanbjohnston]

Hi Gregory,

There are lots of great videos introducing basic command line Linux on a Raspberry Pi that should be able to help you get started.

CubeSatSim/sim.cfg is a relative path to a configuration file used by the CubeSatSim software. It is relative to the pi user home directory. The full or absolute path is /home/pi/CubeSatSim/sim.cfg So you could use CubeSatSim/sim.cfg to reference this file if you are in the home directory. One way to quickly get to the home directory is to type cd

Now, if you just type a file name in Linux, the operating system will try to run it as a program or a script. Since this configuration file is neither, that’s why you get that error. If you wanted to edit that file, you would need to use an editor such as nano or vim.

However, I don’t recommend you directly edit this file. Instead, you should use the configuration script that I have written. The configuration scripts assume you are in the home directory, so always type a cd to start, then the command. So if you want to set your amateur radio callsign, type this:

cd

CubeSatSim/config -c

You can also use this script to see the current configuration of your CubeSatSim by typing:

CubeSatSim/config

To see all the possible configuration options, type:

CubeSatSim/config -h

Good luck!

Alan

[GMW1988]

Thank you, I was able to get it to work. However, the instructions in the Wiki said type: cd. Next type in CubeSatSim/config. When I typed CubeSatSim/config. It was not recognized and I was told it was a bad command.

However, when I typed: cd, next I typedCubeSatSim/config -c that was recognized and I was able to type in my Call Sign. What does the -c mean in CubeSatSim/config -c. Also, what the -h mean in CubeSatSim/config -h?

I found the book "The Complete Reference, Linux, Sixth Edition, by Richard Petersen. I will look for additional books. I also will visit You Tube to see what I can find.

Thanks,

Gregory

[alanbjohnston]

Hi Gregory,

I don't know why you got a "bad command" or "command not found" error, maybe you did a typo or typed a period after the cd

When you type something in the Linux shell then hit return, Linux looks for a command or executable or script that has that name. If none is found, you get the "command not found" error. If it is found, it is run, and whatever was typed after the command is passed to the application as parameters. So when you type CubeSatSim/config -h Linux looks in the CubeSatSim directory for config, finds an executable script and then runs it, and it passes the string "-h" to the script as parameters, which I wrote. You can see the script code here: https://github.com/alanbjohnston/CubeSatSim/blob/master/config or you can type cat CubeSatSim/config (after typing cd to make sure you are in the home directory) and see it.

My code parses the string for parameters and interprets "-h" as as the "help" option and prints out all the possible parameter settings. Any of them can be typed and the script will recognize them. If you type one such as "-z" which my code doesn't support, you will see this message: "Unknown option. Try config -h for a list of supported options." Many Linux commands use options set by a dash and a letter or a double dash and a word (e.g. "--help").

BTW, have you ever looked at this readme file? http://cubesatsim.org/download/cubesatsim-readme.pdf It has useful instructions and hints for using the Raspberry Pi code.

Alan