why we put #!/usr/bin/sh

Shell Programming and Scripting
1

Hi All,

why we put #!/usr/bin/sh in our 1rst line of shell script.
And can we place them after 4 lines which are not related to shell.

Pls provide me some insight on this.

Thanks inadvance

2

to tell in which shell, the script 'll be executed.

in ur case the script 'll be executed in sh shell.
#!/usr/bin/ksh - > for ksh shell.

etc

-anchal.

3

It's only necessary if you're not sure which shell the script will be running in.

But if you use it, it DOES have to be the first line.

4

Hi.

For more details, history, cautions, further references, etc. see Shebang (Unix) - Wikipedia, the free encyclopedia

Google and Wikipedia are your friends ... cheers, drl

5

Thanks. Lots of cool info there.

Of course, they are only your 'friends' if you know that #! is 'pronounced' "She-Bang".

Personally, I got a feeling that if you knew it's pronounced 'She-Bang', you'd already know it's purpose.

6

Hi.

If you search Wikipedia for the string #!/bin/sh or #!/usr/bin/sh the first hit is:

# Shebang (Unix)
... ne shell's behaviour, but be aware that using <tt>#!/bin/sh</tt> in [[shell script]]s may invoke different Bo ... #!/bin/sh
9 KB (1415 words) - 17:01, 21 March 2008

It is your friend ... cheers, drl