UNIX/LINUX QUESTION. Solutions and Output, please!

Use the FOR loop to write a shell script that adds an extension .bak to all the files in a directory by changing all the files in a directory to a .bak extension. Kindly make sure to supply the directory name as an argument while running the test script.

I already created this script below. I have two files (when, who) that don't have any extensions. They reside in a directory I call zewo.

How can i improve on my script to backup (.bak extension) those files. Thanks.

femamezi@cs: ~/zewo GNU nano 2.5.3 File: Lab9a.sh Modified A /bin/bash dir-$i for file in 1s $1/ do mv Sfile Sfile.bak done