On Thu, Jan 17, 2019 at 07:53:09AM +0100, kevin wrote: > I looked at Greg Wooledge's site > <https://mywiki.wooledge.org/BashGuide/TestsAndConditionals#Conditional_Blocks_.28if.2C_test_and_.5B.5B.29>: > > > Since *[[* isn't a normal command (like [ is), but a /shell > keyword/, *it has special magical powers*. *It parses its arguments > before they are expanded by Bash and does the expansion itself*, > taking the result as a single argument, even if that result contains > whitespace. (In other words, [[ does not allow word-splitting of its > arguments.) /However/, be aware that simple strings still have to be > quoted properly. [[ treats a space outside of quotes as an argument > separator, just like Bash normally would. > > Unfortunately, there is no example that shows how *[[* differs from the > usual shell operation.
https://mywiki.wooledge.org/BashFAQ/031 may be a better reference.
