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always try to add the following at the top in your script, it helps to find which command should be used to sun the script when you run the command ./script_name
For perl :
#!/usr/bin/perl
For bash :
#!/bin/bash
if you want to run a shell script there are two ways :
sh script_name
or change the file permission via chmod and run directly
./script_name
How about pulling up a good online tutorial and working through it, instead of asking? Tutorials generally start with a section on how to set up and launch a script.
BTW, note that when you run a script with "sh script_name", any shebang in it is ignored (since it starts with a "#" comment character). A new shell session is first opened, and the lines in the file are simply executed one after the other. The shebang only has a special function if the script is executed directly.
Also be aware that /bin/sh is not the same as /bin/bash. While bash may be set up as the interpreter for sh, it also may not be, and even if it is, the shell any script executed with "sh" is interpreted according to posix-compliant syntax. Shell-specific features may or may not work as expected.
Last edited by David the H.; 07-20-2012 at 11:13 AM.
Reason: addendum
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