Sponsored Content
Top Forums Shell Programming and Scripting what does echo $$, $? $# mean Post 302219717 by gokulagiridaran on Wednesday 30th of July 2008 12:14:51 AM
Old 07-30-2008
what does echo $$, $? $# mean

Hi I am not good in scripting, can anyone of you please help me, with these echo $$, $? $# mean, any good guide / doc on these basics would be much more helpfull.

Thanks in advance.
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

echo

what is the meaning of this echo $description | wc -m` -ne "1" (0 Replies)
Discussion started by: debasis.mishra
0 Replies

2. UNIX for Dummies Questions & Answers

echo

Is there a way to get echo to make newlines without using any type of quotes? I've done a lot of searches and went into my Linux book to no avail. I'm trying to write five separate lines to a file. I can get echo to accept all five lines like this echo \ \this is line 1\ \this is line 2\ >... (6 Replies)
Discussion started by: Trekker182
6 Replies

3. Shell Programming and Scripting

Difference between using "echo" builtin and /bin/echo

So in my shell i execute: { while true; do echo string; sleep 1; done } | read line This waits one second and returns. But { while true; do /bin/echo string; sleep 1; done } | read line continues to run, and doesn't stop until i kill it explicitly. I have tried this in bash as well as zsh,... (2 Replies)
Discussion started by: ulidtko
2 Replies

4. Shell Programming and Scripting

echo !.

can someone tell me what does this code do? echo !. (2 Replies)
Discussion started by: ryandegreat25
2 Replies

5. UNIX for Dummies Questions & Answers

How to correctly use an echo inside an echo?

Bit of a weird one i suppose, i want to use an echo inside an echo... For example... i have a script that i want to use to take users input and create another script. Inside this script it creates it also needs to use echos... echo "echo "hello"" >$file echo "echo "goodbye"" >$file ... (3 Replies)
Discussion started by: mokachoka
3 Replies

6. Shell Programming and Scripting

Help with echo

Hi Guys, I need to print a value in the same line , But when we use the echo instead the loops (while), the value goes to the next line.. Can you help me in this.. Thanks For your help in advance. (6 Replies)
Discussion started by: mac4rfree
6 Replies

7. Shell Programming and Scripting

With that logic this echoes "echo". Question about echo!

echo `echo ` doesn't echoes anything. And it's logic. But echo `echo `echo ` ` does echoes "echo". What's the logic of it? the `echo `echo ` inside of the whole (first) echo, echoes nothing, so the first echo have to echo nothing but echoes "echo" (too much echoing :P):o (2 Replies)
Discussion started by: hakermania
2 Replies

8. Shell Programming and Scripting

tcsh - understanding difference between "echo string" and "echo string > /dev/stdout"

I came across and unexpected behavior with redirections in tcsh. I know, csh is not best for redirections, but I'd like to understand what is happening here. I have following script (called out_to_streams.csh): #!/bin/tcsh -f echo Redirected to STDOUT > /dev/stdout echo Redirected to... (2 Replies)
Discussion started by: marcink
2 Replies

9. UNIX for Dummies Questions & Answers

echo

Hello, I'm working with ksh. I was working with the echo command That is echo "Today is $date" which would show for example Toady is 7/12/12 which was fine however, know I only recieve the first part of the echo without the date. Today is Could I have edited the echo... (9 Replies)
Discussion started by: JD_Sal
9 Replies

10. UNIX for Dummies Questions & Answers

Difference between echo `ls -l` and echo "`ls -l`" ?

Hi guys, Been messing around with shell programming for a couple of days and I found something that was pretty odd in the behavior of the echo command. Below is an example-: When I type the following in my /home directory from my lxterminal in Debian-: echo "`ls -l`" I get the... (2 Replies)
Discussion started by: sreyan32
2 Replies
UPDATE-RCCONF-GUIDE(8)						 Debian GNU/Linux					    UPDATE-RCCONF-GUIDE(8)

NAME
update-rcconf-guide - Create default guide file for rcconf SYNOPSIS
update-rcconf-guide DESCRIPTION
Update-rcconf-guide creates the default guide file which rcconf uses. Update-rcconf-guide searches the package names corresponding to each service file in /etc/init.d directory from dpkg info files(/var/lib/dpkg/info/*.list) and get the description of these packages using apt-cache. Update-rcconf-guide uses Short-Description in priority to the description if service files has Short-Description field. Update-rcconf-guide writes those results to /var/lib/rcconf/guide.default file. You can write your own guide in user guide file(/var/lib/rcconf/guide) by hand. Rcconf refers Guides in /var/lib/rcconf/guide before those in /var/lib/rcconf/guide.default. If you install some packages after executed update-rcconf-guide, you need to re-create this file using update-rcconf-guide so as to refresh guide.default that includes new guides for installed new services. Notice: update-rcconf-guide was not executed when you installed rcconf package. FILE
/var/lib/rcconf/guide.default Guide File update-rcconf-guide generates. /var/lib/rcconf/guide Guide File user(Administrator) can define. SEE ALSO
rcconf(8) AUTHOR
Atsushi KAMOSHIDA <kamop@debian.org> perl v5.10.1 2009-01-21 UPDATE-RCCONF-GUIDE(8)
All times are GMT -4. The time now is 02:17 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy