Howto run a shell script without changing file access permission

Q. I know chmod command needs to apply to each shell script to make it executable. I’m wondering is if there’s a way to run a shell script without changing file access permission.

A. You can simply use following format
shellname {/path/to/scriptname}
OR
. {/path/to/scriptname}

For example if a shell name is bash and a script name is chkhealth.bash, enter
$ bash chkhealth.bash
OR
$ . chkhealth.bash

Note: dot (,) read and execute commands from given FILENAME and return control to shell.

Other shell examples:
$ ksh /path/to/script.ksh
OR
$ csh /path/to/script.csh

So it is more convenient to invoke the shell with the script as argument. However, I recommend to use chmod command for regular usage:
$ chmod +x script.sh $ ./script.sh

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Howto run a shell script without changing file access permission

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