How to use the Linux ed command

Use the command:

Info Ed

To view the usage, the summary is as follows:

Ed [filename] entered, filename does not write the new file;

P: (uppercase) display prompt;

P: (lowercase) Prints the current line, such as input ', p ' (without quotation marks) to display the full text;

Enter a number to select the line to edit;

A: Append, m move, such as: 5M8 namely: 5 lines moved to 8 rows;

C: Change;

S/old/new for replacement

WQ filename Save new file

Q: Exit;

。 (Point command): fallback from Input mode to command mode

R!date: Writes the execution result of the command date to the cache, and the command date can be any shell command

How to use the Linux ed command