Editing text in the command-line can be accomplished with various command-line text editors. Depending on the system you are using, you may have a variety of alternatives available such as vim,nano,ed,sed and so on.
To open a file for editing in a command-line editor, the command would be something like the following:
vim file_name
This would open up your specified file in the command-line text editor vim (assuming it is installed). Once the file is open, you can start editing the text.
Some basic commands you can use in the text editor are:
• Save your changes: :w
• Quit without saving: :q!
• Undo changes: u
• Redo changes: Ctrl+r
• Find and replace string: :%s/old-string/new-string/g
.*Note: Some of these commands may vary from one command-line editor to another.
Once you are done editing the file, you can save the changes and quit the editor. It is important to note that the text editor must be exited properly with the command :wq or :x in order to save any changes made.
Hope this helps!