How to execute a bash script

Shell Programming and Scripting
1

Hi All,

I am trying to write a simple bash script.

rm -f File1

I saved this as test.sh
Now when I want to execute it, I type

./test.sh

It gives me error "command not found"

What I am doing incorrect here? Do I have to add anything in script like

#!/bin/bash
2

Yes, you should add "#!/bin/bash" as the first line.

You also need to set the script executable.

chmod +x test.sh

And, you should never, ever name a script "test" because there's already system utilities named "test".

3

Thanks for your reply.
I did as mentioned by you.

Now my script looks like:

#!/bin/bash
rm -f File1

I renamed it to Trial12.sh
I also changed mode by using

chmod +x Trial12.sh

And I executed using

 ./Trial12.sh

I got this error:
-bash: ./Trial12.sh: /bin/bash^M: bad interpreter: No such file or directory

4

Stop editing your scripts with Notepad. Windows saves carriage returns to the end of lines, breaking everything. Use a real editor inside your terminal, like nano or vim.

1 Like
5

Thanks!
Actually I am new to Unix scripting and not very comfortable with Vi editors.
Now I did everything in unix and it is working.

Thanks Again.

6

vi was designed for an ancient, minimal, and very alien keyboard, and emacs was designed for something even weirder... I've been scripting for years and still dont' use vi unless I have to. It's useful to learn since lots of unix systems have one or the other and nothing else, but if you install nano, I think you'll find it a lot more familiar.