On Mon, 14 Sep 2015 22:31:21 +0200, Ralf Mardorf wrote:
>card=1; killall -9 jackd && jackd -dalsa -dhw:$card -r48000 -p1024 -n2
                          ^^
                          That's a bad idea, either would be ||.
Run it that way:
card=1; killall -9 jackd; jackd -dalsa -dhw:$card -r48000 -p1024 -n2
                        ^