Hi,
I am using the sed command for search and substitute but now i have a problem here.
Normally, i do:

sed s/ForThis/NewThis/g filename.txt

This will search
ForThis and replace it with NewThis in file filename.txt

Now, I want to do the same thing but substitution should happen on 2 lines as:
ForThis and replace it with NewThis1 and NewThis2 in file filename.txt as below:
NewThis1
NewThis2

If i want on same line, no problems. But i have to get these on 2 separate lines one after the other. Can someone help. I tried with \n but its not taking
sed s!"ForThis"!"NewThis1\nNewThis2"! filename.txt

Regards Ambrish

Here the \n symbol is interpreted as a litteral n. Try to embed it in double quotes to prevent excaping from the shell
or enclose the sed command in quotes

Not working

Got error as:
sed s/ForThis/NewThis1"\n"NewThis2/g filename.txt
bash: /ForThis/NewThis1"\n"NewThis2/: event not found

Tried like this:
sed 's/ForThis/NewThis1\nNewThis2/g' filename.txt
It printed on same line as below:
NewThis1nNewThis2

Then, tried as below:
sed 's/ForThis/NewThis1\\nNewThis2/g' filename.txt
It printed on same line as below:
NewThis1\nNewThis2

Again tried as below:
sed 's/ForThis/NewThis1'\n'NewThis2/g' filename.txt
Result is
NewThis1nNewThis2


Any other option?

Maybe your version of sed does not support newline escapes in the replacement string. Which version is it and on which system?

Anyway, you can try something like this
this will substitute the string ForThis with NewThis1, then add a new line (G command) and finally substitute the new line with NewThis2. Just three steps instead of one.

nopes
Per your suggesstion, this is the exact input i gave (this is my project requirement):

sh -c '(su - rgc3 -c " ( cd ini ; sed /ResourceName0=/{s/ResourceName0=/ResourceName0=RGC_FIP/;G;s/ResourceName1=OAM_FIP/} "gnetd.ini" >gnetd_dummy ) ")' > ./.stdout_565 2> ./.stderr_565

And the error i got:
more ./.stderr_565
Too many {'sksh: G: not found
ksh: s/ResourceName1=OAM_FIP/}: not found

Ok. Try to escape the semi-colons, otherwise the shell will interpret them as command separators. Also, you forgot the search pattern /$/ in the second substitution. See the parts in red in the corrected command line: