Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

What does a double $ represents?

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting What does a double $ represents?
# 1  
Old 05-20-2014
Hammer & Screwdriver What does a double $ represents?
Hi Team,

I have the following statement in my script
"chgrp dw $$DSSDATW5/W5DW_RUNNING.out"

Which throws the error "chgrp: 50528606DSSDATW5/W5DW_RUNNING.out: No such file or directory"

Can you please let me know what does this $$ refers to
# 2  
Old 05-20-2014
It represents the PID of the shell which you are in

Each time you run the script, the value of $$ would differ.
Please contact the author of the script about the purpose of using it.
Also I doubt if the intention is to use a nested variable which doesn't work like this.

$$ in the filenames are generally used to make unique files which are temporary in nature and deleted when the process has finished, to avoid any un-necessary reference of the fix filename used by some other process.
# 3  
Old 05-20-2014
hey thanks for the info CLX. I will try to understand with the info you provided.
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Replace Double quotes within double quotes in a column with space while loading a CSV file

Hi All, I'm unable to load the data using sql loader where there are double quotes within the double quotes As these are optionally enclosed by double quotes. Sample Data : "221100",138.00,"D","0019/1477","44012075","49938","49938/15043000","Television - 22" Refurbished - Airwave","Supply... (6 Replies)
Discussion started by: mlavanya
6 Replies

2. Shell Programming and Scripting

Replacing Double Quote in Double Quote incsv file

Hi All , We have source data file as csv file and since data could contain commas ,each attribute is quoted into double quotes.However problem is that some of the attributa data also contain double quotes which is converted to double double quote while creating csv file XLs data : ... (2 Replies)
Discussion started by: Shalini Badal
2 Replies

3. Shell Programming and Scripting

Replace double quotes with a single quote within a double quoted string

Hi Froum. I have tried in vain to find a solution for this problem - I'm trying to replace any double quotes within a quoted string with a single quote, leaving everything else as is. I have the following data: Before: ... (32 Replies)
Discussion started by: pchang
32 Replies

4. Solaris

What OS closest represents Solaris

Hi all. Im new to programming and Unix. Want to start learning to use Solaris 11. I have 2 boxes currently and want to run an all in one Solaris Box to act as a file server, web server ect. I want to use the second box as my main programming box that is as close to a Solaris OS as possible that has... (3 Replies)
Discussion started by: Fingerz
3 Replies

5. UNIX for Dummies Questions & Answers

double while

file1 contents: jandoe1 johndoe1 file2 contents: jandoe johndoe my output file names file3, and has contents as: This is jandoe1 my script: cat file1 | while read line1 cat file2 | while read line2 do do sed -e 's/${line1}/${line2}/g' file3 > file3 done done (5 Replies)
Discussion started by: lawsongeek
5 Replies

6. Post Here to Contact Site Administrators and Moderators

what is this + represents ?

For some of the users, i see there is a + (plus) symbol appended with their userid. what is the + represents here ? please refer the attached image. (3 Replies)
Discussion started by: itkamaraj
3 Replies

7. Shell Programming and Scripting

Replace double double quotes using AWK/SED

Hi, I have data as "01/22/97-"aaaaaaaaaaaaaaaaa""aaa""aabbbbbbbbcccccc""zbcd""dddddddddeeeeeeeeefffffff" I want to remove only the Consequitive double quotes and not the one which occurs single. My O/P must be ... (2 Replies)
Discussion started by: Bhuvaneswari
2 Replies

8. Shell Programming and Scripting

double-quote inside double-quote

hey all, i made a simple .sh like this: echo "<style media="screen" type="text/css">@import url("main.css");</style>" but the output is: <style media=screen type=text/css>@import url(main.css);</style> i want to keep double-quotes, can anyone help me? thanks (3 Replies)
Discussion started by: indraf
3 Replies

9. Programming

double pow (double x, double y) -- problems

This is the code and I'm wondering why line 14: a = ... and line 16: b = ... is wrong. This is the first time I've tried to use this. Please help me. #include <stdio.h> #include <math.h> // The link and how the double pow is used. // // http://www.nextdawn.nl/c-reference/pow.php //... (2 Replies)
Discussion started by: pwanda
2 Replies

10. Shell Programming and Scripting

double quotes

I have a file with 1 column and its data is as follows; "Happy Hour, Party on 18"" staged on 20th." Can anyone please suggest me how do I remove the embedded quote in data stage while reading this column. awk or sed might be able to do the trick . but i am not sure how to accomplish this. ... (4 Replies)
Discussion started by: pavan_test
4 Replies
Login or Register to Ask a Question