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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 Rscript it works
$ Rscript shebang.r
but when I run it from the command line alone
$ shebang.r
It doesn't work. shebang.r command not found.
If I type (based on other examples I've seen)
$ ./shebang.r
I get permission denied.
Yes, Rscript is located in /usr/bin directory
402
The shebang is always on the first line of the file, and is composed of the characters #! followed by the path to the interpreter program. You can also specify command line options, if necessary.
(Here –vanilla is equivalent to –no-environ –no-site-file –no-init-file.) However, note that R CMD does not of itself use any R startup files (in particular, neither user nor site Renviron files), and all of the R processes run by these tools (except BATCH ) use –no-restore.
As we mentioned earlier,#!/usr/bin/env bash is also a shebang line used in script files to execute commands with the Bash shell. It uses the env command to display the environment variables present in the system and then execute commands with the defined interpreter.
Make the file executable.
chmod 755 shebang.r
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