sed : how to use delimiter
 

Hi,

i have a file like:


it is for
the format is
...


now my problem is when i give this sed command :

sed 's/for/sfor/g'

it replaces "for" as well as "format" so how to delimit this so that the output should be:

it is sfor
the format is
...

not

it is sfor
the sformat is
...

try:

Really good SED tutorial here:
http://www.grymoire.com/Unix/Sed.html

Keep in mind that SED is literal---in your example, "for" does not mean the word "for"--it means those three letters in sequence.