1. The super sed stream editor. Super sed reads the specified files or the standard input if no files are specified, makes editing changes according to a list of commands, and writes the results to the standard output. Super sed is an enhanced version of GNU sed 3.02. Relative to 3.02, there are several new features (including in-place editing of files, extended regular expression syntax and a few new commands) and some bug fixes. From Debian 3.0r0 APT