Sed(Streamline EDitor) is a very usefull command line tool for unix platforms.  It can perform a search and replace on text file, however the version of sed on Solaris cannot actually save the file.  Not sure why but i find it idiotic however instead of typing sed just type perl -pi -e and that will perform your replacement example  “sed” command:

perl -pi -e ’s/find/found/g’ /root/example

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