How to use the Linux ed command

Ed is the simplest text editing program in Linux. It can only edit one row at a time rather than the full screen mode.

The ed command is not a common command. Generally, the vi command is used. However, the ed text editor is useful for editing large files or text editing in shell scripts.

Syntax

Ed [-] [-Gs] [-p <string>] [-- help] [-- version] [file]

Parameters:

• -G or -- traditional provides the back-compatible function.
• -P <string> specifies the prompt character of ed in command mode.
• -S,-, -- quiet or -- silent does not perform the check function when the file is enabled.
• -- Help: displays help.
• -- Version: displays the version information.

Instance

The following is a complete Linux ed instance resolution:

$ Ed <-activate ed command

A <-tell ed that I want to edit the new file

My name is Titan. <-enter the content of the first line.

And I love Perl very much. <-enter the second line of content

. <-Return the command line status of ed

I <-tell ed that I want to insert content before the last line

I am 24. <-insert "I am 24." between "My name is Titan." And "And I love Perl very much."

. <-Return the command line status of ed

C <-tell ed that I want to replace the last input line

I am 24 years old. <-replace "I am 24." with "I am 24 years old." (note: The Last input is replaced here)

. <-Return the command line status of ed

W readme. text <-name the file "readme. text" and save it. (Note: If you are editing an existing file, you only need to enter w)

Q <-exit the ed editor completely

The content of this file is:

$ Cat readme. text

My name is Titan.

I am 24 years old.

And I love Perl vrey much.