ED line editor - tutorial
Ed is a line-oriented text editor.
It can be used interactively or in shell scripts.
Ed is the original text editor for Unix. It was written by Ken Thompson in 1971.
Ed is a small editor with few dependencies that can help you edit some files in situations where no other editor is usable.
INSTALLATION (DEBIAN)
$ sudo aptitude install ed$ which ed/bin/ed
$ ed # run ed program.RUNNING ED EDITOR
$ ed file_name # opens file_name for editing. Changes are not stored until w command is introduced.COMMAND STRUCTURE
Ed works by accepting commands to edit parts of the file.
Commands usually have this structure:
[ADDRESS [,ADDRESS]]COMMAND[PARAMETERS]
Commands are one letter long.
Address means to which lines command is applied to.
Parameters are passed to command.
