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:
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
This book approaches system administration in a practical way and is an invaluable reference for both new administrators and experienced professionals. It details best practices for every facet of system administration, including storage management, network design and administration, email, web hosting, scripting, and much more.$ Check price