ed:tldr:a5ebb

ed: Edit a specific file (this shows the byte count of the loaded file).

$ ed ${filename}

try on your machine

This command is using the text editor ed to open and edit a file with the name specified in the variable ${filename}.

ed is a text editor that operates in line mode, meaning it processes commands one line at a time rather than displaying the entire file on the screen. It is a basic editor without a graphical interface.
${filename} is a placeholder for the actual name of the file you want to edit. The dollar sign $ indicates that filename is a variable.

When this command is executed, the ed editor will be launched, and you can then use various commands to modify the contents of the file specified by ${filename}.

This explanation was created by an AI. In most cases those are correct. But please always be careful and never run a command you are not sure if it is safe.

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