And there’s your problem. You’re echoing using double quotes which will interpret characters. Don’t do that. That’s a bug. cat or cp the file to the destination; printf if the contents are all in that variable.

Here’s what I’m reading:

startup-script line 27 threw the error.

I’m reading this and interpreting that line 27 of that script is

sudo echo "# FYI quotes(") must be escaped with \ like \"

I am confused why there is no trailing double quote, the last 3 chars should be \"" so perhaps this is a bad assumption but the best I can do with the available information.

So the fix here is to change startup-script line 27 so that you’re not echoing things that might contain characters that might be interpreted by echo or your shell.

Now if startup-script is provided by your distro, there may be a reason that it’s using echo, but I will tell you now whatever dipshit reason they provide they’re fucking wrong because EXHIBIT A: # " fucks the script and rule 0 of linux is “don’t break userspace”.

Everything else allows any printable char after the # in a comment, that script is not special, comments are not to be interpreted by the program. That is a show-stopping bug in startup-script and must be fixed.

EOF

i think the real error was that you started the echo with a double quote and ended with a single quote. had you properly wrapped it with single quotes it would have worked. even if you had escaped the double quote, there still would have been an error because you’d have a multi-line string with no ending " (the 2nd double quote was properly escaped so that would not have terminated your string)

Also, you didn’t escape your slashes.

Either it should have looked like this:

echo '# FYI quotes(") must be escaped with \ like \"'

or this:

echo "# FYI quotes(\") must be escaped with \\ like \\\""