shebang line not working in R script

Question

I have the following script

#!/usr/bin/Rscript

print (\"shebang works\")

in a file called shebang.r. When I run it from command line using Rsc

Answer 1

In addition to Sjoerd's answer... Only the directories listed in the environment variable PATH are inspected for commands to run. You need to type ./shebang.r (as opposed to just shebang.r) if the current directory, known as ., is not in your PATH.

To inspect PATH, type

echo $PATH

To add . to PATH, type

export PATH="$PATH:."

You can add this line to your ~/.bashrc to make it happen automatically if you open a new shell.