>>206
レスありがとうございます。言われた通り-fxを書き込み実行しました。
pi@raspberrypi:~ $ ./led.sh
+ echo 4
./led.sh: 4: ./led.sh: cannot create /sys/class/gpio/gpio4/direction: Permission denied
+ echo out
./led.sh: 5: ./led.sh: cannot create /sys/class/gpio/gpio4/value: Permission denied
+ echo 1
./led.sh: 6: ./led.sh: cannot create /sys/class/gpio/gpio4/value: Permission denied
+ echo 0
+ count=0
+ [ 0 -le 15 ]
./led.sh: 10: ./led.sh: cannot create /sys/class/gpio/gpio4/value: Permission denied
+ echo 1
+ sleep 0.5
+ echo 0
+ sleep 0.5
+ expr 0 + 1
+ count=1
+ [ 1 -le 15 ]
+ echo 1
+ sleep 0.5
+ echo 0
+ sleep 0.5
+ expr 1 + 1
+ count=2
あと同じです。