Anyone can help me..
I've re-flashed my device (kernel and emmc). All processo without problems.

I've installed only OpenSSH server and client and rootsh.

When i try to, open x-terminal, and type: sudo echo 900000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq ; it gives me 'cannot create .... permissions denied'.

why?