|"||Double Quotes||"Double Quotes" - Anything enclose in double quotes removed meaning of that characters (except \ and $).|
|'||Single quotes||'Single quotes' - Enclosed in single quotes remains unchanged.|
`Back quote` - To execute command
$ echo "Today is date"
Can't print message with today's date.
$ echo "Today is `date`".
It will print today's date as, Today is Tue Jan ....,Can you see that the `date` statement uses back quote?
|Shell Arithmetic|| |