Visit Our UNIX and Linux User Community

Passing variables to sed

Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Passing variables to sed
# 1  
Old 10-28-2007
Passing variables to sed

Hi Folks,

How can I make the following to work from a korn shell?

sed -n 's/$old/$new/gp' $file

Thanks in advance

# 2  
Old 10-28-2007
use double quotes
# 3  
Old 10-28-2007
try this

sed -n 's/'$old'/'$new'/gp' $file
# 4  
Old 10-29-2007
Changed my mind

Thanks. Both the suggestions worked. Since I am planning on calling sed for the same file but for multiple strings, I notice the file takes a lot of abuse. Hence, I have decided to go with nawk.

I tried mimicking the same (following) format for the nawk utility but it does not work with nawk ?

nawk '{ gsub(/'$old'/,'$new') }' $file

Any suggestions.

Thanks in advance.


Previous Thread | Next Thread
Test Your Knowledge in Computers #373
Difficulty: Medium
JInterpreter is Java bytecode designed to be executed by the Java virtual machine.
True or False?

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Passing awk variables to bash variables

Trying to do so echo "111:222:333" |awk -F: '{system("export TESTO=" $2)}'But it doesn't work (2 Replies)
Discussion started by: urello
2 Replies

2. Shell Programming and Scripting

Passing variables to a sed function

Hi everyone, I've re-written some of our scripts to use more functions and I've run into a situation where passing a variable to a sed function does not work. My function is a one-liner sed command as follows: function StringSub() { sed -i "${1}/${2}/${3}/${4}" ${5} } Where ${1} through... (4 Replies)
Discussion started by: richardsantink
4 Replies

3. Shell Programming and Scripting

Help with passing multiple variables into SED

Hello I am hoping you can help. I use ksh in Solaris9 I am trying to pass user imputed variables into SED but for some reason can only get SED to recognize one variable. I have experimented with te below command with putting ' ' and " " in different places but I cant seem to get it to... (8 Replies)
Discussion started by: lostincashe
8 Replies

4. Shell Programming and Scripting

Passing 2 variables

Hi All, I need to pass 2 variables name 'vamskt' and 'vamsi'. Here is my question: delete from gpi.usergroup where usg_user_id in ('vamskt'); delete from gpi.userroles where uro_user_id in ('vamskt'); delete from gpi.user where usr_id in ('vamskt'); insert into gpi.user... (3 Replies)
Discussion started by: tvamsikiran
3 Replies

5. Shell Programming and Scripting

passing variables to sed in ksh

Hi, i need help passing variables to sed using ksh. My goal is to get particular data from log files. first i put a mark to the log files. echo "TEST_"`date + %m_%d_%Y_%T"` >markFile this will produce a 'markFile' which contain text like this TEST_06_01_2009_21:55:09 then i put the mark... (2 Replies)
Discussion started by: d.anggrianto
2 Replies

6. Shell Programming and Scripting

sed pattern matching or passing variables

I need sed to add a "/>" to the end of a line that contains/starts with <meta. current line is <meta name="keywords" content="kayword 1, kwyword2"> and should be <meta name="keywords" content="kayword 1, kwyword2 " /> i need something like this? find . -name "*.html" -print0 | xargs... (6 Replies)
Discussion started by: sky_rivers
6 Replies

7. Shell Programming and Scripting

passing variables to sed function in a script ....

Hello , I have a script named wherein I have two variables $var and $final (both of which contain a number) I have a sed write function inside this script as follows: sed '1,2 w somefile.txt' fromfile.txt Now , in the above i want to pass $var and $final instead of... (2 Replies)
Discussion started by: shweta_d
2 Replies

8. Shell Programming and Scripting

passing variables to sed inside script

I am trying to pass a regular expression variable from a simple script to sed to remove entries from a text file e.g. a='aaaa bbbb cccc ...|...:' then executing sed from the script sed s'/"'$a"'//g <$FILE > $FILE"_"1 my output file is always the same as the input file !! any... (5 Replies)
Discussion started by: Daniel234
5 Replies

9. Shell Programming and Scripting

Passing variables to sed

Hi folks, I'm looking for a solution to pass variables to a sed-command. I'm reading a lot of threats and also the q&a "How can I use a variable in sed?". None of these commands works. I'm using AIX 5.2. I want to do the following: NUMBER=` echo 38341` | sed -n '/$NUMBER/p' an obtained... (3 Replies)
Discussion started by: jfisch
3 Replies

10. Shell Programming and Scripting

passing variables

Hi, Is there any way to pass variable to a sed script.For awk we have -v that do we have any way to pass variable to a sed script from a awk script or from normal script? Thanx, sounder (1 Reply)
Discussion started by: sounder123
1 Replies

Featured Tech Videos