In This Chapter
sed (stream editor) utility is a batch (noninteractive) editor. It transforms an input stream that can come from a file or standard input. It is frequently used as a filter in a pipe. Because it makes only one pass through its input,
sed is more efficient than an interactive editor such as
sed command line has the following syntax:
sed [-n] program [file-list]sed [-n] -f program-file [file-list]
sed utility takes its input from files you specify on the command line or from standard input. Unless you direct output from
sed elsewhere, it goes to standard output. ...