mg:tldr:cea0f

The command "mg ${filename}" is a command used in certain Unix-based systems to open a text editor called "mg" and specify the name of the file to be opened within the editor.

Here is a breakdown of each component in the command:

• "mg": Refers to the name of the text editor being executed. In this case, "mg" is a small, lightweight emacs-like text editor commonly found in Unix systems.
• "${filename}": Represents a variable that should be replaced with the actual name of the file you want to open. The "${}" syntax is used to reference the value of a variable within the command. For example, if you want to open a file named "example.txt" using this command, you would replace "${filename}" with "example.txt", resulting in "mg example.txt".

So, when the command "mg ${filename}" is executed, the "mg" text editor will be launched, opening the specified file for editing within the editor.