ed

The original Unix text editor.

• Start ed, editing an empty document (which can be saved as a new file in the current directory):

ed

• Start ed, editing an empty document, with `:` as a command prompt indicator:

ed -p :

• Start ed editing an existing file (this shows the byte count of the loaded file):

ed -p : {path/to/file}

• Toggle the printing of error explanations. (By default, explanations are not printed and only a `?` appears):

H

• Add text to the current document. Mark completion by entering a period by itself in a new line:

a{text_to_insert}.

• Print the entire document (`,` is a shortcut to the range `1,$` which covers the start to the end of the document):

,p

• Write the current document to a new file (the filename can be omitted if `ed` was called with an existing file):

w {filename}

• Quit ed:

q

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