Question

I have written a small script with which I take the name of a File.

#objectname
echo "objectname"
read ON

Can’t get simpler.

I do some processing with the file I get.

gpg -c --no-use-agent "$ON"

For example if I have a file a.exe –> It will encrypt it and give me a file with a different md5 and an extension. Now, the file looks this way a.exe.gpg

Now, if I give it a bind the name of the file directly.

like this for example:
Taken from : this link

# This works
fileName='a.exe.gpg'
md5sum=$(md5sum ${fileName})
echo $md5sum

it returns it properly.

What if I want to do it dynamically.

This is what I tried:

#does not work
gpg -c --no-use-agent "$ON"
fileName= `$ON.gpg`
md5sum= $(md5sum ${fileName}) 
echo $md5sum

I get this bug here: upload.sh: 1: upload.sh: Fire.exe.gpg: not found and the program does not exit.

May I ask where exactly is the mistake I am doing?

Answer 1

The error is here:

fileName= `$ON.gpg`

1. There should be no space after =. (Also look at the next line.)
2. You used back-quotes, which execute $ON.gpg rather than simply evaluating it. Back-quotes are the same as $(...) but less elegant. Use double-quotes for this.

Read Greg’s wiki entry on quotes for an ultra-detailed explanation with opinionated commentary. 🙂