LinuxQuestions.org
Share your knowledge at the LQ Wiki.
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Newbie
User Name
Password
Linux - Newbie This Linux forum is for members that are new to Linux.
Just starting out and have a question? If it is not in the man pages or the how-to's this is the place!

Notices


Reply
  Search this Thread
Old 07-17-2012, 11:48 AM   #1
masanga
LQ Newbie
 
Registered: Jul 2011
Posts: 1

Rep: Reputation: Disabled
Executing a script.


After writing a script, how do you execute it on the command line ie on the terminal.
 
Old 07-17-2012, 11:54 AM   #2
amani
Senior Member
 
Registered: Jul 2006
Location: Kolkata, India
Distribution: Debian 64-bit GNU/Linux, Kubuntu64, Fedora QA, Slackware,
Posts: 2,766

Rep: Reputation: Disabled
first make it executable: chmod
usually cd to directory

#./NAME_OF_SCRIPT
 
Old 07-17-2012, 01:39 PM   #3
Lexus45
Member
 
Registered: Jan 2010
Distribution: Debian, Centos, Ubuntu, Slackware
Posts: 361
Blog Entries: 3

Rep: Reputation: 48
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:
Code:
bash yourscript
 
Old 07-17-2012, 04:16 PM   #4
sharadchhetri
Member
 
Registered: Aug 2008
Location: INDIA
Distribution: Redhat,Debian,Suse,Windows
Posts: 179

Rep: Reputation: 23
Quote:
Originally Posted by Lexus45 View Post
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:
Code:
bash yourscript
adding terminology info, #!/bin/bash this section called shebang and it has many synonym

http://en.wikipedia.org/wiki/Shebang_%28Unix%29
 
Old 07-17-2012, 07:27 PM   #5
chrism01
LQ Guru
 
Registered: Aug 2004
Location: Sydney
Distribution: Centos 7.7 (?), Centos 8.1
Posts: 18,231

Rep: Reputation: 2708Reputation: 2708Reputation: 2708Reputation: 2708Reputation: 2708Reputation: 2708Reputation: 2708Reputation: 2708Reputation: 2708Reputation: 2708Reputation: 2708
I'd recommend only
Code:
chmod u+x script
Don't go handing out execute privs to the world....
http://linux.die.net/man/1/chmod
 
Old 07-18-2012, 03:56 AM   #6
piyush.sharma
Member
 
Registered: Jul 2012
Location: Delhi, India
Distribution: CentOS
Posts: 82

Rep: Reputation: Disabled
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
 
Old 07-18-2012, 09:28 PM   #7
frankbell
LQ Guru
 
Registered: Jan 2006
Location: Virginia, USA
Distribution: Slackware, Ubuntu MATE, Mageia, and whatever VMs I happen to be playing with
Posts: 18,759
Blog Entries: 28

Rep: Reputation: 5965Reputation: 5965Reputation: 5965Reputation: 5965Reputation: 5965Reputation: 5965Reputation: 5965Reputation: 5965Reputation: 5965Reputation: 5965Reputation: 5965
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.
 
Old 07-20-2012, 11:03 AM   #8
David the H.
Bash Guru
 
Registered: Jun 2004
Location: Osaka, Japan
Distribution: Arch + Xfce
Posts: 6,852

Rep: Reputation: 2037Reputation: 2037Reputation: 2037Reputation: 2037Reputation: 2037Reputation: 2037Reputation: 2037Reputation: 2037Reputation: 2037Reputation: 2037Reputation: 2037
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.

Here are a few useful bash scripting references:
http://mywiki.wooledge.org/BashGuide
http://www.linuxcommand.org/index.php
http://mywiki.wooledge.org/BashFAQ
http://mywiki.wooledge.org/BashPitfalls
http://wiki.bash-hackers.org/scripting/newbie_traps
http://tldp.org/LDP/Bash-Beginners-G...tml/index.html
http://www.tldp.org/LDP/abs/html/index.html
http://www.gnu.org/software/bash/manual/bashref.html
http://wiki.bash-hackers.org/start
http://ss64.com/bash/


I recommend the bashguide and linuxcommand as good starting pages.
 
Old 07-20-2012, 11:07 AM   #9
David the H.
Bash Guru
 
Registered: Jun 2004
Location: Osaka, Japan
Distribution: Arch + Xfce
Posts: 6,852

Rep: Reputation: 2037Reputation: 2037Reputation: 2037Reputation: 2037Reputation: 2037Reputation: 2037Reputation: 2037Reputation: 2037Reputation: 2037Reputation: 2037Reputation: 2037
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
 
  


Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off



Similar Threads
Thread Thread Starter Forum Replies Last Post
executing perl script inside shell script scriptme101 Programming 3 04-11-2012 09:30 AM
Bash Script - executing answer to another script domz Programming 4 11-07-2010 04:19 PM
Run an external script, without holding up the currently executing script onesikgypo Programming 2 03-07-2009 09:26 PM
Bash script - executing a script through subdirectories bubkus_jones Programming 5 04-24-2006 05:05 PM
executing a script!! vishamr2000 Linux - Security 5 07-29-2005 02:34 AM

LinuxQuestions.org > Forums > Linux Forums > Linux - Newbie

All times are GMT -5. The time now is 05:56 PM.

Main Menu
Advertisement
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Open Source Consulting | Domain Registration