I use xcode to create my Bash scripts. When you make a new script file it will put the right format in there to start with.
All Scripts start with
#!/bin/sh
As the very first line.
Then it gets your script bit inserted on the lines following that.
You are on a Mac and want the # symbol, its Alt + 3.
Save the file. It needs to be executable, so it needs permissions to do this. For that I use the chmod command in Terminal.
chmod -Rf 777 /Path/to/File.sh
That will make the file executable by everyone and readable by everyone and writable by everyone.
The numbers are for Owner, Group, Others
Read = 4
Write = 2
Execute = 1
Add up what you want in the 3 numbers and put it in.
755
Read and write and execute for the Owner 4+2+1=7
Read and execute for the Group 4+1=5
Read and execute for Others 4+1=5
There are other ways to achieve this. This is just the way I do it.
If you run the script from Jamf, you shouldn't need the sudo, as the script will be running as the root superuser.
Your script will be along these lines...
#!/bin/sh
sh -c 'echo "Sandboxing Relaxed" >> /etc/cups/cups-files.conf'
launchctl stop org.cups.cupsd
