Ken: you do not need to chmod +x (is on a vfat and mounted to add +x to all files)
[root@(none) ~]# ls -la /mnt/onboard/.kobo/KoboLauncher/
total 108
drwxr-xr-x 13 root root 4096 Jul 3 02:08 .
drwxr-xr-x 9 root root 4096 Jul 3 00:16 ..
-rwxr-xr-x 1 root root 120 Jul 3 02:58 KoboLauncher.sh
-rwxr-xr-x 1 root root 429 Jul 2 22:44 KoboLauncher.sh-old
Also as a tip, I start usbnet (which also starts dropbear sshd):
[root@(none) ~]# cat /mnt/onboard/.kobo/KoboLauncher/KoboLauncher.sh
#!/bin/sh
/mnt/onboard/.kobo/KoboLauncher/usbnet/start.sh
/mnt/onboard/.kobo/koreader/koreader_kobo.sh /mnt/onboard
[root@(none) ~]# cat /mnt/onboard/.kobo/KoboLauncher/usbnet/start.sh
#!/bin/sh
root=/mnt/onboard/.kobo/KoboLauncher/usbnet
insmod /drivers/ntx508/usb/gadget/arcotg_udc.ko
insmod /drivers/ntx508/usb/gadget/g_ether.ko
ifconfig usb0 192.168.2.101
$root/dropbear -E -r $root/host.key.rsa -d $root/host.key.dss > $root/dropbear.log 2>&1
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