Let's do a quick review on the two types of quotation marks and back tick before we move on.
Here's a quick recap of the differences between the two quotation marks. Head over to our Command Line series lesson for a more in-detailed look.
$ echo $123 # Evaluates $1 as positional parameter 23 $ echo "$123" # Same as above 23 $ echo '$123' # Literal output $123 $ printf "Today's calendar: \n`cal`" Today's calendar: July 2015 Su Mo Tu We Th Fr Sa 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31:
Command Line Kung Fu is packed with dozens of tips and practical real-world examples. You won't find theoretical examples in this book. The examples demonstrate how to solve actual problems. The tactics are easy to find, too. Each chapter covers a specific topic and groups related tips and examples together.$ Check price
Stretch out your back and relieve your back muscles with inversion therapy. This device counteracts the forces of gravity on the body by decompressing and elongating the spine. By using this product just ten minutes a day, you can be well on your way to improved circulation and posture while relieving muscle aches, back pain and stress.$$ Check price