sed (Stream EDitor) is a programming language used to apply textual transformations to a sequential stream of data. It reads input files line by line, applying the operation which has been specified v... More

sed (Stream EDitor) is a programming language used to apply textual transformations to a sequential stream of data. It reads input files line by line, applying the operation which has been specified via the command line (or a sed script), and then outputs the line. It was developed from 1973 to 1974 as a Unix utility by Lee E. McMahon of Bell Labs, and is available today on most operating systems.  [edit]  Less