05-13-2013
exec is a shell built-in. While it can be used to replace the current shell process with some other command, it is also used to manipulate file descriptors in the current shell. In this instance, since exec's arguments consist solely of redirections, no command is executed; exec is redirecting standard output, 1>, and standard error, 2>, to two different log files.
To experiment and learn, you can install Cygwin on your windows machine. The default install includes bash and other core utilities.
Regards,
Alister
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