Unix - SED - Stream Editor

SED  -   Stream Editor

•Reads one line at a time from input files

•Applies the commands from a list of commands one at a    time, in order, to each line

•writes to standard output

Usage

sed ‘list of ed commands’ filenames...

Example

sed ‘s/UNIX/UNIX(TM)/g’ filenames

replaces UNIX by UNIX(TM) in all the file occurences and writes the result to standard output

COMMANDS

a\  text  Appends text on the output before reading the   next input line

b label  Branch to the : command bearing the label

c\ text  change lines to the following text

d  delete line; read next input line

p   print

r  read

w  write

q  quit