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Questions tagged [shebang]

In computing, a shebang is the character sequence consisting of the characters number sign and exclamation mark (that is, "#!") at the beginning of a script.

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Shebang line for Node does not work in Ubuntu 18

I have just created an Ubuntu 18.04 instance on AWS and copied an existing project over. The usual shebang line for Node #!/usr/bin/env node now doesn't work. It gave: #!/usr/bin/env: No such file ...
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What is the shebang ( #!/bin/bash). [duplicate]

why do we use shebang in the beginning of a shell script file. does the script will run without it. I tried running it without shebang in shell script but it didn't run.
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255 views

Python 2 interpreter instead of 3 in Geany

On my PC, Python 2 and 3 are installed – a query of the versions, using the terminal, outputs the following: $ python2 --version Python 2.7.14 $ python3 --version Python 3.6.3 I would like to ...
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1answer
126 views

What is "#!' in a script file? [duplicate]

$cat shebang.sed #! /bin/sed -f s/red/xxx/ s/BLUE/1234/ $./shebang.sed rgb lower (#1): "xxx green blue" UPPER (#2): "RED GREEN 1234" $sed -f shebang.sed rgb lower (#1): "xxx green blue" UPPER (#2): ...
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1answer
766 views

Python shebang line

I am trying to execute a script in python as a cgi script using apache2. However instead of executing, the file gets downloaded. I have allowed my python file to be an executable. I think this is ...
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3answers
4k views

Is there a command for running a script according to its shebang line?

If I want to execute a bash script which doesn't have its execution permission set, I can do: bash script.sh What should I use instead of bash if the script isn't executable and I don't know the ...
0
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1answer
73 views

Ubuntu execute file without ./

Using a shebang line, I added the functionality to launch a TCL script using the wish shell. However, I can only quickly launch the file by typing ./filename.tcl in the terminal. I would like to know, ...
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3answers
312 views

What is this line at the top of many files?

I have seen many files which have this line as the first line in them. What exactly is this? #!/usr/bin/env python What does it mean? Why is it necessary?
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4answers
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What is the difference between #!/bin/sh and #!/bin/bash?

if I write, #!/bin/bash echo "foo" or #!/bin/sh echo "foo" both yields same. I have seen some scripts starting with #!/bin/sh or #!/bin/bash. Is there any difference between them?
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3answers
4k views

What type of path in shebang is more preferable?

In scripts, first line should specify the path to interpreter. But on different servers Linux, Unix, or BSD this path could be different. What is more preferable? #!/usr/bin/env bash or #!/bin/...