Sed \(em A Non-interactive Text Editor g non-interactive context editor g Overall Operation s Command-line Flags s Order of Application of Editing Commands s Addresses: Selecting lines for editing s Line-number Addresses s Context Addresses s Number of Addresses s Functions s Whole-line Oriented Functions s Substitute Function s Input-output Functions s Multiple Input-line Functions s Hold and Get Functions s Flow-of-Control Functions s Miscellaneous Functions s command file s current input line s current line s delimiting character s grouping command s hold area s embedded newline s leading blanks s line number s line-number counter s pattern space regular expression terminal newline s CW $ S * matches S . matches S = function p CW ^ S CW [] S \e( S \e) S CW a S CW b S CW { S CW } S CW c S CW d S CW g S CW h S CW i S CW n S p flag S CW p S CW q S CW r S CW s S CW t S CW w S I ed c -n S CW-e S -f S CW& S