[SOLVED] Writing filename of file into itself Linux/fedora.

Issue

I've a little dilemma right now and I'm writing a small shell script that creates 10 files, and then within each file its file name is written.

This is what I have so far:

for f in {0..9}.txt
do
    echo Hello, this is the first line of '#$f' > "File${f}"

done

So output for each file should be:

Hello, this is the first line of file0 

Hello, this is the first line of file1

etc.

Solution

When you use single quotes, the shell will not expand what is inside them. So '#$f' is treated as literally the string #$f instead of being expanded to the value of $f. Try this instead:

for f in {0..9}.txt; do
    echo "Hello, this is the first line of file #$f" > "File${f}"
done

Example:

$ cat File3.txt
Hello, this is the first line of file #3.txt

Answered By - Josh Jolly