Question: how to make ipk file?
Answer: Step 1: Extract the .ipk archive using ar x <archive name>
Step 2: Then extract the data.tar.gz using tar -xvzf data.tar.gz.
Step 3: Modify the extracted file(s) as necessary.
Step 4: Then re-create data.tar.gz using the modified files by using tar -czvf data.tar.gz <list of files or folders separated by spaces>