What's the difference of using #!/usr/bin/env or #!/bin/env in shebang?

Question

Will there be any difference or it\'s just a personal choice?

Answer 1

Mikel explanation is great, it misses just a small fact (which is rather important), it's only one argument being passed including all spaces:

#! 

Results in calling:

$  '' path_to_calling_script

So for Example:

$ cat /tmp/test
#!/usr/bin/env python
print "hi"

$ /tmp/test

is the same as calling:

$ /usr/bin/env "python" /tmp/test

The quotes try to show that if you add any flag or other values will be part of the argument being called.

 #!/bin/bash -c /bin/env python

Will be interpreted as:

 $ /bin/bash "-c /bin/env python"

Which won't work.