In the vi editor, which command is used to save the current file without quitting, thereby remaining in the editing mode?

Introduction / Context:
The vi editor in Unix/Linux is one of the most powerful text editors. A core skill is knowing how to save changes without exiting the editor. This helps when you want to preserve your work but continue editing further.

Given Data / Assumptions:

• User is working in vi editor.
• Requirement is to save changes but remain in editing mode.

Concept / Approach:

Commands in vi begin with a colon (:) when in command mode. The :w command writes (saves) the file to disk but does not close it, allowing the user to continue editing.

Step-by-Step Solution:

Verification / Alternative check:

Compare :wq which saves and quits. Using only :w leaves you in vi to continue editing.

Why Other Options Are Wrong:

• x: writes and exits.
• q!: quits without saving.
• :q: quits only if no changes are made.
• None of the above: incorrect because :w is correct.

Common Pitfalls:

• Forgetting to press ESC before entering command mode.
• Confusing :w with :wq.

Final Answer:

:w.