LinuxQuestions.org
Support LQ: Use code LQ3 and save $3 on Domain Registration
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 11-28-2010, 01:46 PM   #1
geekpie
LQ Newbie
 
Registered: Oct 2006
Posts: 24

Rep: Reputation: 0
echo $$


What does echo $$ give as output?
 
Old 11-28-2010, 01:51 PM   #2
druuna
LQ Veteran
 
Registered: Sep 2003
Posts: 10,532
Blog Entries: 7

Rep: Reputation: 2387Reputation: 2387Reputation: 2387Reputation: 2387Reputation: 2387Reputation: 2387Reputation: 2387Reputation: 2387Reputation: 2387Reputation: 2387Reputation: 2387
From the bash man page:

Quote:
Expands to the process ID of the shell. In a () subshell, it expands to the process ID of the current shell, not the sub-shell.
 
Old 11-28-2010, 01:55 PM   #3
bigrigdriver
LQ Addict
 
Registered: Jul 2002
Location: East Centra Illinois, USA
Distribution: Debian stable
Posts: 5,877

Rep: Reputation: 350Reputation: 350Reputation: 350Reputation: 350
$$
process ID variable. The $$ variable holds the process ID of the script in which it appears.
 
Old 11-29-2010, 07:04 AM   #4
geekpie
LQ Newbie
 
Registered: Oct 2006
Posts: 24

Original Poster
Rep: Reputation: 0
thanks.
 
  


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
echo $USER/ sudo echo $USER jamescondron Programming 6 06-04-2009 12:58 AM
ls | echo, I got blank, why can't echo take the 2nd seat in a pipeline? elinuxqs Linux - Newbie 6 11-24-2006 09:25 AM
BASH: How to NOT echo to screen with "if echo $x | grep ".*"; then" eur0dad Programming 9 07-27-2006 03:14 PM
Kphone echo (echo echo) scabies Linux - Software 0 10-18-2004 03:59 PM
Echo /devPrinting doesn't work, echo /usb/lp0 works, Testpage works, Printing doesn't Hegemon Linux - General 3 08-15-2002 02:13 PM


All times are GMT -5. The time now is 03:15 AM.

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
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration