Three ways to run a Shell Script

Technique number	Command	permissions	Subprocess created?
1	`Myscript`	r-x	Yes:runs as a child process of the current shell
2	`/bin/sh myscript`	r--	Yes:runs as a child process of the current shell
3	`. myscript`	r--	No:runs inside the current shell

How do I run .sh files?

Give execute permission to your script:

chmod +x /path/to/yourscript.sh

To run your script:

/path/to/yourscript.sh

Since . refers to the current directory: if yourscript.sh is in the current directory, you can simplify this to:

./yourscript.sh