问题
I found serval node.js projects that have this at top of their app.js (as in this openshift program):
#!/bin/env node
What does this mean? How does this work? Where is it useful?
回答1:
The full line from your example is:
#!/bin/env node
This simply means that the script should be executed with the first executable named 'node' that's found in your current PATH.
The shebang (#!) at the start means execute the script with what follows. /bin/env is a standard unix program that looks at your current environment. Any argument to it not in a 'name=value' format is a command to execute. See your env manpage for further details.
回答2:
env is a shell command used to specify an interpreter.
来源：https://stackoverflow.com/questions/15061001/what-does-bin-env-mean-at-the-top-of-a-node-js-script