Essentially it is correct. For sleeping 5 seconds you need to call "sleep 5s"
altough the number given to sleep is treated as second per default.
& is used to send each programm in the background prior launching the next
programm.
I would only use && to chain the command sequence if it is likely that
calling on program fails.
My version would look like this:
#!/bin/sh
/usr/bin/foo &
sleep 5s
/usr/bin/baar
Of course you could make this a bit more sophisticated by waiting for the
process of /usr/bin/foo prior launching /usr/bin/baar.
HTH,
Holger
