Sed variable not expanding

 
Thread Tools Search this Thread
Top Forums UNIX for Beginners Questions & Answers Sed variable not expanding
# 1  
Old 02-15-2020
Sed variable not expanding

I have also some difficulty calling sed to change a word in a file.

Code:
sed -i 's/docTitl/Outline ${docTitl}/g' $ofln

Moderator's Comments:
Mod Comment Moved to new thread, since it is a different question

Last edited by Scrutinizer; 02-15-2020 at 01:04 PM..
# 2  
Old 02-15-2020
You need to use double quotes, rather than single ones in this case. Shell variables inside single quotes do not get expanded.
This User Gave Thanks to Scrutinizer For This Post:
# 3  
Old 02-15-2020
Hi
It's best to do so.
Take a variable in double quotes
and enclose the left and right parts of the script body
single quotes
Code:
's/docTitl/Outline '     "$docTitl"    '/g'

it turns out such a design
Code:
sed -i 's/docTitl/Outline '"$docTitl"'/g' $ofln

# 4  
Old 02-15-2020
Have noticed that using double quotes solves the problems.

Code:
sed -i "s/docTitl/Outline ${docTitl}/g" $ofln




Moderator's Comments:
Mod Comment merged from other thread

Last edited by Scrutinizer; 02-16-2020 at 06:32 AM..
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Expanding a globed variable name

Heyas I'm trying to give some information on used variables. While the first two work fine, the ones starting with a glob (is that the proper term?) fail. echo ${!TUI_*} ${!RET_*} ${!*_CLI} ${!*\_GUI} bash: ${!*_CLI}: bad substitution Same with @ or have them escaped. I found no... (2 Replies)
Discussion started by: sea
2 Replies

2. Shell Programming and Scripting

Quick question on expanding variable

s=`awk '{ print $0}' /Applications/Relink.app/z_cloudline.txt` sed -n '"$s"' /var/mobile/Library/iFile/Bookmarks.plist > /var/mobile/originalip.txt What is the problem with that code ? With variable it only outputs: sed: -e expression #1, char 1: unknown command: `"' If I use the... (3 Replies)
Discussion started by: pasc
3 Replies

3. Red Hat

How to pass value of pwd as variable in SED to replace variable in a script file

Hi all, Hereby wish to have your advise for below: Main concept is I intend to get current directory of my script file. This script file will be copied to /etc/init.d. A string in this copy will be replaced with current directory value. Below is original script file: ... (6 Replies)
Discussion started by: cielle
6 Replies

4. Solaris

expanding RAM

our sparc server has only 1Gb RAM. Since RAM is not very expensive anymore, it seems like a good idea to upgrade it. will it make server (and database on it) faster? I hope it would less 'abuse' hard drive.. (6 Replies)
Discussion started by: orange47
6 Replies

5. Shell Programming and Scripting

Expand an environment variable in sed, when the variable contains a slash

I'm trying to make a sed substitution where the substitution pattern is an environment variable to be expanded, but the variable contains a "slash". sed -e 's/<HOME_DIRECTORY>/'$HOME'/'This gives me the following error: sed: -e expression #1, char 21: unknown option to `s'Obviously this is... (2 Replies)
Discussion started by: Ilja
2 Replies

6. Solaris

Variable not expanding during Solaris pkgadd

I'm having a little trouble with a Solaris package build/install. I have the following entries in my prototype file... # Interfaces file - all versions installed and auto linked to installation type... f none $OPTDIR/config/interfaces.DEV 0444 $OWNER $GROUP f none... (0 Replies)
Discussion started by: JerryHone
0 Replies

7. Shell Programming and Scripting

expanding alias from a variable

Hi ! I am making my first steps to make a script. Therefore i try to make a scp command more easier. Given is the following alias: 14='admin@x-abcd-def.xyz Now i want to let the script read three var's from the console to use them in the script and then build the scp string. echo... (7 Replies)
Discussion started by: locutus01
7 Replies

8. Shell Programming and Scripting

Insert a line including Variable & Carriage Return / sed command as Variable

I want to instert Category:XXXXX into the 2. line something like this should work, but I have somewhere the wrong sytanx. something with the linebreak goes wrong: sed "2i\\${n}Category:$cat\n" Sample: Titel Blahh Blahh abllk sdhsd sjdhf Blahh Blah Blahh Blahh Should look like... (2 Replies)
Discussion started by: lowmaster
2 Replies

9. Shell Programming and Scripting

Sed variable substitution when variable constructed of a directory path

Hello, i have another sed question.. I'm trying to do variable substition with sed and i'm running into a problem. my var1 is a string constructed like this: filename1 filerev1 filepath1 my var2 is another string constructed like this: filename2 filerev2 filepath2 when i do... (2 Replies)
Discussion started by: alrinno
2 Replies

10. Shell Programming and Scripting

Expanding shell variable

I have a question about expanding shell variables. Given the following piece of script: a="Some text" b="Other text" for i in a b do string1=$i echo $string1 --> returns 'a' string2=EXPRESSION_WITH_$i echo $string2 --> returns 'Some text' done ... (2 Replies)
Discussion started by: lonar
2 Replies
Login or Register to Ask a Question