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

#! tries to run to read and run the rest of the file.

So #!/usr/bin/env means that there must be a program called /usr/bin/env;
#!/bin/env means that there must be a program called /bin/env.

Some systems have one and not the other.

In my experience, most have /usr/bin/env, so #!/usr/bin/env is more common.

Unix systems will try to run using execve, which is why it must be a full path, and #!env without a path will not work.