Sponsored Content
Top Forums Shell Programming and Scripting Bash-how to properly READ and PASTE variables. Post 302575377 by Corona688 on Monday 21st of November 2011 12:31:54 PM
Old 11-21-2011
Variables will never substitute in single quotes.

Code:
VAR="1234"
echo '${VAR}'
${VAR}
echo "${VAR}"
1234
$

 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

I can't seem to pass variables properly into a nawk statement

Ok, So up front I'm going to say that I'm a very elementary scripter, and I tend to use tools I don't fully understand, but I shotgun at something until I can get it to work...that said, I can't for the life of me understand why I can't get this to go down the way I want it to. The goal: -to... (6 Replies)
Discussion started by: DeCoTwc
6 Replies

2. Shell Programming and Scripting

arrays not printing properly in bash

hi guys, i wrote this script and it takes some fields from a file and puts it into three different arrays. The first array works just fine but when I try to use the second array (ARRAY1) all i get is a blank value on the screen.. this works fine..i get ARRAY value on the screen just fine ... (1 Reply)
Discussion started by: npatwardhan
1 Replies

3. Shell Programming and Scripting

command paste with variables

Hi. I have an interesting problem and i couldn't find out the solution. I have two variables in which there are a lot of lines finished by \n. I would like to concatenate this two variables into one in this format: var1var2 var1var2 . . . I could do this simply by command paste but it works... (32 Replies)
Discussion started by: samos
32 Replies

4. Shell Programming and Scripting

read file column and paste it in command

Hi Unix gurus I have a file containing 2 coloumns. I would like to do a script which reads the lines and executes a command like this: command <field1> parameters <field2> some more parameters Please let me know how you would do this without AWK, SED or any other mini language (for special... (5 Replies)
Discussion started by: BearCheese
5 Replies

5. Shell Programming and Scripting

Need helpl in scripting read 2 lines and paste to one single line.

Hi All, I need to create script which will accept one file as i/p and give me o/p file described as below. 1) i/p log file named abc.log contents several lines but i am interested in lines like below. #FILE..... /oracle/XYZ/sapdata1/undo_7/undo.data7 #SAVED.... BACKINTID001 2) o/p... (4 Replies)
Discussion started by: paragp1981
4 Replies

6. Shell Programming and Scripting

Bash script to read a hostname and separate into variables

Hi All, I'm trying to concoct a bash script to use with a Puppet Implementation that will accept a hostname and break it down into variables. For example, my hostnames look like this --> machinename-group-building.example.com I'm looking for a way in the script to read until the first... (4 Replies)
Discussion started by: glarizza
4 Replies

7. Shell Programming and Scripting

echo two variables like the paste command is not working

Dear all, I have two files like this file1 A B C D E F file2 1,2 3,4 5,6 I want this output output_expected A B 1,2 C D 3,4 E F 5,6 (3 Replies)
Discussion started by: valente
3 Replies

8. Shell Programming and Scripting

Need help with paste command using variables

How can I accomplish this? I basically want to merge two variables onto the same line. I can do it with two FILES this way: $ cat /tmp/users_in.list | awk -F "," '{print $2}' | cut -c -1 > first.initial $ awk -F "," '{print $1}' /tmp/users_in.list | awk '{print $1}' > last.name $ paste... (5 Replies)
Discussion started by: greenlightening
5 Replies

9. Shell Programming and Scripting

How to paste properly?

I needed to view calendar for several months so I created a separate file for each and then pasted them like this: cal Dec 2011 > x1; cal Jan 2012 > x2; paste x1 x2 December 2011 January 2012 Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa 1 2 3 1 2 ... (4 Replies)
Discussion started by: migurus
4 Replies

10. Shell Programming and Scripting

Beginner here, how to call a bash-script from python properly?

Hi everyone, i have the following script.sh: foo='lsusb | grep Webcam | cut -c16-18' sudo /home/user/public/usbreset /dev/bus/usb/001/$foo when i try to call this script from python using subprocess.call("script.sh", shell=True) it seems that only 'sudo /home/user/public/usbreset' is being... (6 Replies)
Discussion started by: hilfemir
6 Replies
LIBBASH(7)							  libbash Manual							LIBBASH(7)

NAME
libbash -- A bash shared libraries package. DESCRIPTION
libbash is a package that enables bash dynamic-like shared libraries. Actually its a tool for managing bash scripts whose functions you may want to load and use in scripts of your own. It contains a 'dynamic loader' for the shared libraries ( ldbash(1)), a configuration tool (ldbashconfig(8)), and some libraries. Using ldbash(1) you are able to load loadable bash libraries, such as getopts(1) and hashstash(1). A bash shared library that can be loaded using ldbash(1) must answer 4 requirments: 1. It must be installed in $LIBBASH_PREFIX/lib/bash (default is /usr/lib/bash). 2. It must contain a line that begins with '#EXPORT='. That line will contain (after the '=') a list of functions that the library exports. I.e. all the function that will be usable after loading that library will be listed in that line. 3. It must contain a line that begins with '#REQUIRE='. That line will contain (after the '=') a list of bash libraries that are required for our library. I.e. every bash library that is in use in our bash library must be listed there. 4. The library must be listed (For more information, see ldbashconfig(8)). Basic guidelines for writing library of your own: 1. Be aware, that your library will be actually sourced. So, basically, it should contain (i.e define) only functions. 2. Try to declare all variables intended for internal use as local. 3. Global variables and functions that are intended for internal use (i.e are not defined in '#EXPORT=') should begin with: __<library_name>_ For example, internal function myfoosort of hashstash library should be named as __hashstash_myfoosort This helps to avoid conflicts in global name space when using libraries that come from different vendors. 4. See html manual for full version of this guide. AUTHORS
Hai Zaar <haizaar@haizaar.com> Gil Ran <ril@ran4.net> SEE ALSO
ldbash(1), ldbashconfig(8), getopts(1), hashstash(1) colors(1) messages(1) urlcoding(1) locks(1) Linux Epoch Linux
All times are GMT -4. The time now is 02:15 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy