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:
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