UNIX for Dummies Questions & Answers

find / -type f -exec fTgt={} ; sed 's/calcuta/kolkata/g' $fTgt > ${fTgt}.tmp ; mv ${fTgt}.tmp ${fTgt} \;

-exec <command> +

       -exec command {} +
              This variant of the -exec option runs the specified  command  on
              the  selected  files, but the command line is built by appending
              each selected file name at the end; the total number of  invoca-
              tions  of  the  command  will  be  much  less than the number of
              matched files.  The command line is built in much the  same  way
              that  xargs builds its command lines.  Only one instance of {}
              is allowed within the command.  The command is executed  in  the
              starting directory.

find / -type f -exec perl -pi -e 's/calcuta/kolkata/g' {} +

find / -type f -exec sed -i 's/calcuta/kolkata/g' {} +