What is the use of the Linux ed command

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Ed single-line plain text editor

Syntax ed (options) (parameters) option A # switches to input mode and enters new content after the last line of the file; C # switches to input mode and replaces the last line with input; I # switches to input mode and adds a new blank line before the current line to enter content; d # is used to delete the last line of text N # is used to display the line number and contents of the last line; w #: a given file name saves the file currently being edited; Q # exits the ed editor. -G or-- traditional: provide compatible functions;-p: specify the prompt character of ed in command mode;-SMagneWhile or-- silent: do not perform the check function when opening files;-- help: display help;-- version: display version information. Parameter file: the file to be edited.

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