Hej Aug!

 A> What are the [ and [[

Along with ] and ]] they are tests and exit returning a 0 for true and 1 for false.

Try this at your busybox commandline;
  [ "a" = "a" ] ; echo $?

It should return a 0 for true since a is equal to a.  Now try;
  [ "a" = "b" ] ; echo $?

In this case it should return a 1 for false since a is not equal to b.

Clear as mud?

Het leven is goed,
Maurice

 o-  -o   -o    o-  -o   -o    o-   o-   o-   o-   o-  -o   -o   -o   -o   -o
/)    (\   (\  /)    (\   (\  /)   /)   /)   /)   /)    (\   (\   (\   (\   (\
^^    ^^   ^^  ^^    ^^   ^^  ^^   ^^   ^^   ^^   ^^    ^^   ^^   ^^   ^^   ^^
... Lieve zestien pingu‹ns van de Apocalyps.
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