In sh/ksh/bash to store the output of a command as a variable you can do either
MY_VAR=$(command) #or you can do MY_VAR=`command`
What's the difference if any between the two methods?
The backticks/gravemarks have been deprecated in favor of
$() for command substitution because
$() can easily nest within itself as in
$(echo foo$(echo bar)). There are also minor differences such as how backslashes are parsed in the backtick/gravemark version.
See the POSIX spec for detailed information on the various differences.