1) Assume "h1.awk" is located at the current working directory.

$ cat h1.awk

NR>=2&&NR

$ awk -f h1.awk float

Output:

Function:

2) $ awk '{print $1, $NF }' float

Output:

Function:

3) Assume "h2.awk" is located at the current working directory.

$ cat h2.awk

BEGIN { print "Start to scan file"}

{print NR NF}

END { print "END", FILENAME }

$ awk -f h2.awk float

Output:

Function:

4) $ sed 's/[^,]*,//g' float

Output:

Function:

5) $ ls *.awk | awk '{ print "cp -r" $1 " " $1 ".new" }' |sh

(Hint: sh file runs file as a shell script. Use ls to discover the changes in your working directory)

Output:

Function:

6) $ mkdir test1 test2 test3

$ ls -l | grep '^d' | awk '{print "mv -r " $9 " " $9 ".new"}' | sh

(Hint: use ls to discover the changes in your working directory)

Output:

Function:

Part III: Write down the output of the last command in each question and describe the function of it. Note: please do not simply say awk executes the commands from a file. Question 1) to 4) are processing the same text file "float". "float" has a content shown as in the table below. To try those commands in the questions, you can create your own "float" file in your Ubuntu system Wish I was floating in blue across the sky, my imagination is strong, And I often visit the days When everything seemed so clear. Now I wonder what I'm doing here at all. Hint: you may need to create "hl.awk" and "h2.awk" in your own computer by yourself