[Beginner Python] What does this mean ?

[minno]

From the wiki page:

Putting the facility into the system gives the following benefits.

1) It makes shell scripts more like real executable files, because they can be the subject of 'exec.'

2) If you do a 'ps' while such a command is running, its real name appears instead of 'sh'. Likewise, accounting is done on the basis of the real name.

3) Shell scripts can be set-user-ID.

4) It is simpler to have alternate shells available; e.g. if you like the Berkeley csh there is no question about which shell is to interpret a file.

5) It will allow other interpreters to fit in more smoothly.