Using Bash command line user interface.

Answer this question in directory ~/class/e01/q04 - file a04.txt

Create a file named q04.sh that does the following:

1. Creates 3 aliases named rfs, ims and chs respectively that usevgrep or wc to:

a. Find and display all the lines containing href (independent of case) in a given file.

b. Find and display all the lines containing jpg, or jpeg (independent of case) in a given file.

c. Finds and displays the size of the file in characters, followed by the filename.

2. Defines an environment variable called CROOT that contains the path to your/home/username/class directory.

3. Defines an environment variable call EXAMPLE1 that contains the path to your/home/username/class/e01 directory.

Run the program using the source command once you have completed it: source q04.sh.

The files t1.html, t2.html, t3.html and t4.html have been provided for testing purposes. The file check04.sh has been provided to help you check your progress.