In the vi editor on Unix/Linux, which command syntax performs a forward search for the pattern ‘‘pat’’ from the current cursor position?

Difficulty: Easy

Correct Answer: /pat

Explanation:


Introduction / Context:
Searching efficiently inside the vi (or Vim) editor is a core skill for developers and administrators. Vi supports forward and backward incremental searches using concise keystrokes, enabling rapid navigation through large configuration files, logs, and source code.


Given Data / Assumptions:

  • You are editing in command mode within vi.
  • You wish to find the next occurrence of a text pattern 'pat'.
  • Standard vi search conventions apply (case sensitivity may depend on options).


Concept / Approach:
In vi, forward search uses a slash followed by the pattern. Backward search uses a question mark. The colon prefix introduces ex-commands (for example, :w, :q, :%s/old/new/g) and is not used for plain search initiation. After a search, n and N repeat the search in the same or opposite direction respectively.


Step-by-Step Solution:

Press / then type pat and hit Enter to search forward.Use n to jump to the next match forward, N to go to the previous match.Use ?pat to search backward if needed.Escape special characters or use \v (in Vim) for very magic regex modes.


Verification / Alternative check:
Open a file containing multiple 'pat' occurrences; invoke /pat and confirm the cursor jumps forward to each occurrence with n. Reverse direction using N to validate the behavior.


Why Other Options Are Wrong:

  • :pat: The colon starts ex-commands; this is not the search syntax.
  • ?pat: This triggers a backward search, not forward.
  • All of the above: Mutually contradictory; only /pat is forward search.


Common Pitfalls:
Remaining in insert mode (press Esc first), forgetting that searches are case-sensitive unless 'ignorecase' or 'smartcase' is set, or leaving metacharacters unescaped when they are interpreted as regex tokens.


Final Answer:
/pat

Discussion & Comments

No comments yet. Be the first to comment!
Join Discussion