Posted By: Anonymous
I was going through some shell script tutorials and found the following sample program:
#!/bin/sh clear echo "HELLO WORLD"
Can anyone please tell me what the significance of the comment
#!/bin/sh at the start is?
It’s called a shebang, and tells the parent shell which interpreter should be used to execute the script.
#!/bin/sh <--------- bourne shell compatible script #!/usr/bin/perl <-- perl script #!/usr/bin/php <--- php script #!/bin/false <------ do-nothing script, because false returns immediately anyways.
Most scripting languages tend to interpret a line starting with
# as comment and will ignore the following
!/usr/bin/whatever portion, which might otherwise cause a syntax error in the interpreted language.