LinuxQuestions.org
Visit the LQ Articles and Editorials section
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Distributions > Linux From Scratch
User Name
Password
Linux From Scratch This Forum is for the discussion of LFS.
LFS is a project that provides you with the steps necessary to build your own custom Linux system.

Notices

Reply
 
Search this Thread
Old 02-23-2006, 01:20 PM   #1
prabhu_713
LQ Newbie
 
Registered: Feb 2006
Posts: 2

Rep: Reputation: 0
use of source command


hi everyone,

i'm new to linux. what is the use of "source command"? i know it executes a script file.

my script file has the following commands:
echo "hello world";
echo "$pwd";
if ran the script using source command or simply on the shell, i get the same answer. then how is "source" command different shell and what is the use of "source command"?

thanks,
prabhu.
 
Old 02-23-2006, 01:27 PM   #2
gilead
Senior Member
 
Registered: Dec 2005
Location: Brisbane, Australia
Distribution: Slackware64 14.0
Posts: 4,123

Rep: Reputation: 151Reputation: 151
The source command does it's stuff in the current shell instead of a sub-shell - the commands behave as if you typed them in your current shell. If you made the file executable and then ran it, the commands would execute in a sub-shell.

When you're only displaying stuff it doesn't matter which way you do it, but when you're controlling variables and processes it does.
 
Old 02-24-2006, 04:07 AM   #3
prabhu_713
LQ Newbie
 
Registered: Feb 2006
Posts: 2

Original Poster
Rep: Reputation: 0
thanks steve
 
Old 02-28-2006, 08:34 PM   #4
cramer
Member
 
Registered: Feb 2006
Distribution: Red Hat 9
Posts: 112

Rep: Reputation: 15
You might want to use the pwd command like so: echo "$(pwd)" instead of $pwd incase you use variables with that name.
 
Old 02-28-2006, 08:42 PM   #5
ckoniecny
Member
 
Registered: Oct 2005
Posts: 162

Rep: Reputation: 30
If you for example, make changes to /home/testuser/.bashrc and you want the changes to take effect immediately, simply run "source /home/testuser/.bashrc". That will update your current shell and you will see the effects of the changes.
 
  


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
the `source` command and my $PATH jayeola Programming 6 12-14-2005 10:45 PM
about the source command kpachopoulos Linux - General 2 06-12-2005 08:16 PM
what the command [source] does ? hq4ever Linux - Newbie 4 06-26-2004 04:09 PM
Where is source for 'who' command grittkmg Programming 2 10-15-2003 01:49 PM
What is the source (Bash) command do ? Linh Linux - General 5 06-09-2003 04:46 PM


All times are GMT -5. The time now is 10:44 AM.

Main Menu
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
identi.ca: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration