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07-17-2012, 11:48 AM
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#1
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LQ Newbie
Registered: Jul 2011
Posts: 1
Rep: 
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Executing a script.
After writing a script, how do you execute it on the command line ie on the terminal.
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07-17-2012, 11:54 AM
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#2
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Senior Member
Registered: Jul 2006
Location: Kolkata, India
Distribution: Debian 64-bit GNU/Linux, Kubuntu64, Fedora QA, Slackware,
Posts: 2,766
Rep: 
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first make it executable: chmod
usually cd to directory
#./NAME_OF_SCRIPT
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07-17-2012, 01:39 PM
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#3
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Member
Registered: Jan 2010
Distribution: Debian, Oracle, Ubuntu, Slackware, OpenBSD, NetBSD, OpenWRT
Posts: 364
Rep:
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1. As it was already mentioned, make it executable and execute then:
Code:
chmod +x yourscript
./yourscript
2. Without making executable. Assuming that the first line of your script is #!/bin/bash:
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07-17-2012, 04:16 PM
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#4
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Member
Registered: Aug 2008
Location: INDIA
Distribution: Redhat,Debian,Suse,Windows
Posts: 179
Rep:
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Quote:
Originally Posted by Lexus45
1. As it was already mentioned, make it executable and execute then:
Code:
chmod +x yourscript
./yourscript
2. Without making executable. Assuming that the first line of your script is #!/bin/bash:
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adding terminology info, #!/bin/bash this section called shebang and it has many synonym
http://en.wikipedia.org/wiki/Shebang_%28Unix%29
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07-17-2012, 07:27 PM
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#5
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LQ Guru
Registered: Aug 2004
Location: Sydney
Distribution: Rocky 9.x
Posts: 18,443
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I'd recommend only
Don't go handing out execute privs to the world....
http://linux.die.net/man/1/chmod
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07-18-2012, 03:56 AM
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#6
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Member
Registered: Jul 2012
Location: Delhi, India
Distribution: CentOS
Posts: 82
Rep: 
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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
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07-18-2012, 09:28 PM
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#7
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LQ Guru
Registered: Jan 2006
Location: Virginia, USA
Distribution: Slackware, Ubuntu MATE, Mageia, and whatever VMs I happen to be playing with
Posts: 20,016
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Oops. piyush.sharma already covered this!
You can also do sh yourscript.sh.
I was a-dither with excitement when I read about that.
Last edited by frankbell; 07-18-2012 at 09:31 PM.
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07-20-2012, 11:03 AM
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#8
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Bash Guru
Registered: Jun 2004
Location: Osaka, Japan
Distribution: Arch + Xfce
Posts: 6,852
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07-20-2012, 11:07 AM
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#9
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Bash Guru
Registered: Jun 2004
Location: Osaka, Japan
Distribution: Arch + Xfce
Posts: 6,852
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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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