PS
Ordinary brackets $( )
================
$(command)
Takes the output of command and inserts it in the command line, similar,
but subtly better than backticks.
eg
[EMAIL PROTECTED] ~ $ $(pwd)
bash: /home/nick: is a directory
bash sees the line $(pwd) as /home/nick and complains because there is
no command /home/nick
[EMAIL PROTECTED] ~ $ `pwd`
bash: /home/nick: is a directory
backticks does the same, as I said there is some subtle difference, and
$() is supposedly preferred, but don't ask me at this time of night to
remember why. Again something to do with special characters I think.
curly brackets ${}
=============
${VARIABLE} produces the same as $VARIABLE, but treats special
characters properly.
