>>What are the rules for when to use
>>" or ' or ` ?? Do they 'evaluate' to differently??
Generally speaking double quotes allow special charachters to be
treated as such and evaluated within string expressions, "$VarThingy" = the
value of VarThingy. Single quotes tend to force these chars to be treated as
strings only, equivalent of using \ to escape special chars btw "'s,
'$VarThingy' = the literal string $VarThingy. As for `, they're great things
altogether, stuff within them gets executed and the result used in the
calling expression, e.g. VarThingy=`grep -i thing file` would set the value
of the variable VarThingy to the result of the grep statement. Sometimes it
can get a bit confusing when you have quotes within quotes and things liek
that but it's all fiddle-with-able, if one type dopesn't work use a
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