While I was referring to usage of SOURCE in linux, I got to know that from here source executes the command in current shell and "./" will execute in new shell.
My question is how do we know in which shell the commands are getting executed ?
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Most (if not all) shells on Linux provide you with the
$SHELL environment variable:
mtak@frisbee:~$ echo $SHELL /bin/bash
It's still a better practice to run with
./ and provide a shell in the script you're running (that's in the first line starting with
#!). This way you get more consistent results.