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Replace fixed strings only

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# 1  
Old 06-18-2009
Replace fixed strings only
Hi All,

I just need to do find and replace in a file....
say for eg I have the input file like below:
in.txt
#####
oldtextoldtext
oldtext
oldtext
oldtext
oldtext123
oldtext-
oldtext

I need to replace oldtext to newtext... my output file should come like below..
out.txt
######
oldtextoldtext
newtext
newtext
newtext
oldtext123
oldtext-
newtext

Pls help me....
Thanks in advance
Saravana
# 2  
Old 06-18-2009
what have you tried? put in some effort.
# 3  
Old 06-18-2009
Did you try anything?
# 4  
Old 06-18-2009
I tried with this cmd :
sed -e 's/oldtext/newtext/g' $file

but it is repalcing all the lines... :-(
# 5  
Old 06-18-2009
easy
sed 's/^oldtext$/newtext/g' $file
# 6  
Old 06-18-2009
Sorry... I forgot add this line in my input file.... If I have the below line in my file then it will not work....

something something oldtext

So it will not work.....
# 7  
Old 06-18-2009
Quote:
Originally Posted by pbillast
sed 's/^oldtext$/newtext/g' $file
there's no need for 'g' as the pattern will appear only ONCE.
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