Shell Programming and Scripting

So, I made a script beginning with #!/bin/bash on gedit.

And I double clicked it to run in terminal and I end up with "The child process exited normally with status 127" and "command not found".

If I run the same script from the terminal as "tcsh (script name)" it runs just fine.

If I copy and past the individual command from my script to the terminal, it runs fine too.

Usually at my work place, double clicking scripts into the terminal works. What do I need to do to be able to run the script with double click on this computer?

Thank you.

p.s. this is my first post.

Hi, welcome to these forums...

From what I gather what you have posted, I'd venture to guess that you have either a csh script or a tcsh script and that your interactive shell is either of those shells.
If that is the case then the shebang #!/bin/bash should be changed to #!/bin/tcsh.
If that is not the case then please post part of your script so we know more....

Code:

#!/bin/bash

cd /home/sean/Desktop/rat

3dcalc -a anat.nii -expr a -prefix anat.short -datum short

When I changed the bash to tcsh it worked. But at my workplace computer, this script worked with #!/bin/bash. Why doesn't #!/bin/bash work on my personal laptop?

My guess is that the PATH variable in bash does not contain the directory, in which 3dcalc resides. What happens when you enter this command:

Code:

bash type 3dcalc

If that command reports that the command could not be found, you can try setting the PATH variable explicitly in the script or prepending the 3dcalc command with the absolute path...

ITYM

Code:

bash -c "type 3dcalc"

The following might work as well

Code:

type 3dcalc

Unlke bash, a tcsh script sources .cshrc or .tcshrc at its start.
You better compare with a

Code:

#!/bin/tcsh -f

script.

I feel a little overwhelmed by this guys.

I have little background in computer science but I have to learn how to write scripts. And if another error like this ever comes up I won't know how to handle it.

I'm planning to go through these lessons on youtube " Unix Shell Scripting Tutorial by MrTutorize" to get a better ground on unix, bash, tcsh, paths, scripts.

Is this a good source? Do you have any other sources to recommend me?

The big question is more why use TCSH ?
Most of us use ksh or bash but for compatibility know well the bourn shell basics, and so try to keep the shells easily portable which is not the case with csh/tcsh...( unless you master them also of course...)