cmoze1:
root@Arduino545:~# run-sysupgrade /mt/sdal/openwrt-ar71xx-generic-yun-16M-squash
fs-sysupgrade.bin
cp: can't stat '/mt/sdal/openwrt-ar71xx-generic-yun-16M-squashfs-sysupgrade.bin': No such file or directory
Please check syntax and typos. It is probably mnt instead of mt and sda1 instad of sdal.