How to create just an executable bash script

[GoCool]

I am a newbie in scripting. I have this silly doubt.
Do I need to give both read and execute permissions for a script to make it executable. Can't I just give execute permissions to it (without read and write)?

Then how to make a script so that except for the admin no other user can see the script or modify the script but can only excecute it.

Any inputs on this would be highly appreciated.

[sisco311]

Read this about permissions:
https://help.ubuntu.com/community/FilePermissions

[GoCool]

Read this about permissions:
https://help.ubuntu.com/community/FilePermissions

Thank you sisco311. Yes I know about changing permissions. But I cant make them execute the bash script, even after giving the execute permission. That is my issue. I even have to give the read permission too. That beats me.

[dtmilano]

bash (or any other interpreter) needs to read the script to execute it.

[Tuna-Fish]

When you make a bash script, and make it executable, you are not really executing it, you are invoking bash, and feeding the script to it in stdin.
The logic looks kinda like this:
# ./script.sh
if x bit set && first chars of file "#!" then run the command on first line <the script.

to make an executable that cannot be read, you need to make a real executable.

[GoCool]

When you make a bash script, and make it executable, you are not really executing it, you are invoking bash, and feeding the script to it in stdin.
The logic looks kinda like this:
# ./script.sh
if x bit set && first chars of file "#!" then run the command on first line <the script.

to make an executable that cannot be read, you need to make a real executable.

Thank you that makes sense.

[erjoalgo]

the question was never answered. how to create a real executable from a bash script?

[soltanis]

You misunderstand the question. To create an executable bash script, you simply put the following line as the first line (indicates the appropriate interpreter) and set the permissions to read-execute.

#!/bin/bash

[Bachstelze]

When you make a bash script, and make it executable, you are not really executing it, you are invoking bash, and feeding the script to it in stdin.

Wrong. You are passing the name of the file as an argument, not passing its contents on stdin.

EDIT: Meh, necromancy...

the question was never answered. how to create a real executable from a bash script?

Define "real executable"?

[erjoalgo]

compiled machine binary code