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When I am writing C code on the vi editor, I am not able to use the backspace keys or my arrow keys to delete or navigate through lines.

Use dt c , where c is any character, eg for you, you want dt This will delete upto but not including c.

To delete one character, position the cursor over the character to be deleted and type x . The x command also deletes the space the character occupied—when a letter is removed from the middle of a word, the remaining letters will close up, leaving n

Use the arrow keys or “j” (down), “k” (up), “l” (right), and “h” (left) to move the cursor. Press “x” to delete a character. 2. Delete three ...

I would recommend using a substitution with regular expression to match the entire string and to capture what you would like to keep in parentheses.

You can simply press the backspace key, but a useful trick to know is ctrl-o where you can run 1 command-mode command and then immediately return to insert ...

Move the cursor to the first character you want to delete, then hit shift-D. Everything gone. Actually, it's in the default cut buffer, so ...

I don't think it is a paste issue. Just pressing the c key results in deleting the most recent character. Typing func goes like, f, fu, fun, ...

TABLE 4.2 vi Commands to Delete Text ; x. Deletes one character (under the cursor) ; X. Deletes one character (behind the cursor) ; dd. Deletes the ...