Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

Using variable inside 'sed'

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Using variable inside 'sed'
# 1  
Old 02-07-2007
Using variable inside 'sed'
Dear all,


How can I amend the following command to use variable inside 'sed' ?

str=`sed -e 's/orig_string/${var}/g' ${sourcefile}`


Thanks,
Rocky
# 2  
Old 02-07-2007
Use double quotes
Code:
str=`sed -e "s/orig_string/${var}/g" ${sourcefile}`

# 3  
Old 11-23-2007
Bug
Quote:
Originally Posted by anbu23
Use double quotes
Code:
str=`sed -e "s/orig_string/${var}/g" ${sourcefile}`

Also, if var is a path, then you'll need to use '\' before '/'. Sed substitutes first and then you still need to make sure you escape special characters such as '/'

Eg
set var="\/mydir\/path"
echo "my file /work/kofeyok/stuff/file.dat, r );" > testfile
sed -e "s/\/work\/kofeyok\/stuff/${var}/g" testfile > temp

temp should have
"my file /mydir/path/file.dat, r );"
without double quotes
# 4  
Old 11-23-2007
Code:
set var="/mydir/path"
echo "my file /work/kofeyok/stuff/file.dat, r );" > testfile
sed -e "s#/work/kofeyok/stuff#${var}#g" testfile > temp

Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

To print value for a $variable inside a $variable or file

Hi guys, I have a file "abc.dat" in below format: FILE_PATH||||$F_PATH TABLE_LIST||||a|b|c SYST_NM||||${SRC_SYST} Now I am trying to read the above file and want to print the value for above dollar variables F_PATH and SRC_SYST. The problem is it's reading the dollar variables as... (5 Replies)
Discussion started by: abcabc1103
5 Replies

2. Shell Programming and Scripting

Variable inside sed

Problem: Need to read contents from a file and use that value inside sed as avariable. sample code below. THe below code replaces contents inside file123 for matched string with "$x" value only. but we want the value of x which is read from TextFile.txt to go in there. cat TextFile.txt|while... (3 Replies)
Discussion started by: cvsanthosh
3 Replies

3. Shell Programming and Scripting

evaluating a variable inside a variable

Hi there, i think im getting myself a little confused and need some help :wall: I am reading in a bunch of variables to my script from an external file and need to validate that a value has been set for each so if you can imagine, the user is required to pass in 4 values... (3 Replies)
Discussion started by: rethink
3 Replies

4. Shell Programming and Scripting

sed inside sed for replacing string

My need is : Want to change docBase="/something/something/something" to docBase="/only/this/path/for/all/files" I have some (about 250 files)xml files. In FileOne it contains <Context path="/PPP" displayName="PPP" docBase="/home/me/documents" reloadable="true" crossContext="true">... (1 Reply)
Discussion started by: linuxadmin
1 Replies

5. Shell Programming and Scripting

Not able to store command inside a shell variable, and run the variable

Hi, I am trying to do the following thing var='date' $var Above command substitutes date for and in turn runs the date command and i am getting the todays date value. I am trying to do the same thing as following, but facing some problems, unique_host_pro="sed -e ' /#/d'... (3 Replies)
Discussion started by: gvinayagam
3 Replies

6. Shell Programming and Scripting

variable inside variable inside loop headache

Hi Gurus I have a file called /tmp/CMDB which looks like this serial: 0623AN1208 hostname: server1 model: x4100 assetID: 1234 I am writing a for loop that will go through this file line by line creating a variable of itself. Using the first iteration of the loop (i.e. the first line) as... (6 Replies)
Discussion started by: hcclnoodles
6 Replies

7. Shell Programming and Scripting

Need help in sed command ( Replacing a pattern inside a file with a variable value )

Hello, The following sed command is giving error sed: -e expression #1, char 13: unknown option to `s' The sed command is echo "//-----" | sed "s/\/\/---*/$parChk/g" where parChk="//---ee-" How can i print the variable value from sed command ? And is it possible to replace a... (2 Replies)
Discussion started by: frozensmilz
2 Replies

8. Shell Programming and Scripting

Sed , Replace a "variable text" inside of a statement

Please Help... I am trying to manipulte the following line Before : <user:Account_Password>002786</user:Account_Password> the password is the "variable", i need to delete / omit the password in the file, (it occurs several thousand times) so the tag line looks like After:... (4 Replies)
Discussion started by: jackn7
4 Replies

9. UNIX for Dummies Questions & Answers

passing a variable inside a variable to a function

I would like to know how to pass a variable inside a variable to a function. sample code below -------------- for x in 1 9 do check_null $C$x ##call function to check if the value is null if then echo "line number:$var_cnt,... (2 Replies)
Discussion started by: KingVikram
2 Replies

10. Shell Programming and Scripting

ksh: A part of variable A's name is inside of variable B, how to update A?

This is what I tried: vara=${varb}_count (( vara += 1 )) Thanks for help (4 Replies)
Discussion started by: pa3be
4 Replies
Login or Register to Ask a Question