OrangePi Lite and armbian - remove services you don't need

Linux Infra-red Remote Control

Uninstalling the service:

apt-get remove lirc

Stop the modules from being loaded at all:

echo install ir_lirc_codec /bin/true > /etc/modprobe.d/ir_lirc_codec.conf
echo install lirc_dev /bin/true > /etc/modprobe.d/lirc_dev.conf
echo install ir_mce_kbd_decoder /bin/true > /etc/modprobe.d/ir_mce_kbd_decoder.conf
echo install ir_sanyo_decoder /bin/true > /etc/modprobe.d/ir_sanyo_decoder.conf
echo install ir_sony_decoder /bin/true > /etc/modprobe.d/ir_sony_decoder.conf
echo install ir_jvc_decoder /bin/true > /etc/modprobe.d/ir_jvc_decoder.conf
echo install ir_rc6_decoder /bin/true > /etc/modprobe.d/ir_rc6_decoder.conf
echo install ir_rc5_decoder /bin/true > /etc/modprobe.d/ir_rc5_decoder.conf
echo install ir_nec_decoder /bin/true > /etc/modprobe.d/ir_nec_decoder.conf
echo install sunxi_cir /bin/true > /etc/modprobe.d/sunxi_cir.conf
echo install rc_core /bin/true > /etc/modprobe.d/rc_core.conf
echo install bmp085 /bin/true > /etc/modprobe.d/bmp085.conf
echo install pcf8591 /bin/true > /etc/modprobe.d/pcf8591.conf

The last two lines avoid the loading of modules for the BMP085 (barometric pressure, temperature and altitude sensor) and PCF8591 (8-bit A/D and D/A converter) that are not present on the Orange Pi Lite.

SFTP server

Remove "Subsystem sftp /usr/lib/openssh/sftp-server" from '/etc/ssh/sshd_config'

Remote syslog

Uninstalling the service:

apt-get remove rsyslog

Generally save energy

Go to '/boot' and edit the 'script.bin'. It can be converted to text and then edited. Convert it with
bin2fex script.bin script.fex
and back to binary with
fex2bin script.fex script.bin
E.g. disable all devices you don't need, e.g. disable the HDMI display and all output
('disp_init_enable = 0, mali_used = 0, g2d_used = 0').  You would do this only on a production system that won't ever have a screen attached, but not on your development system.

For details and other options:
http://linux-sunxi.org/Fex_Guide