Remove User Account of Pi

It is wise to make pi account disabled.

1) Add new user 'adduser'
2) Check current group 'pi' is included by 'groups pi'
3) Add new user to the groups above 'sudo adduser (new) (group)'
4) Kill all pi processes --- by default, Xserver is running so change setting from 'raspi-config'
5) Delete pi --- 'sudo deluser pi'

Setting up headless pi - ssh and wifi

Now it becomes quite easy to set up headless setting.
touch ssh in /boot mounted in FAT file system and
write wpa_supplicant.conf in that path as well.

No need to edit Linux file system any more.

Manual Wifi setting

In order to configure wifi connection manually, type commands like these,


ip link set wlan0 up
wpa_supplicant -B -D wext -i wlan0 -c /etc/wpa_supplicant/wpa_supplicant.conf
iw wlan0 link
dhclient wlan0

or automate by add this to /etc/network.interfaces

allow-hotplug wlan0
auto wlan0
iface wlan0 inet manual
  wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf
iface default inet dhcp

Console connection

Using this console cable, you can enable remote access from your laptop.
From osx, you just type as,

sudo screen /dev/cu.usbserial 115200

GPIO order is,
Green, White, Black, blank, Red.... Careful not to connect Red if power comes from another source as well.

Basic Update

After a long time we need update the modules.

sudo apt-get update -y
sudo apt-get upgrade -y

expand filesystem

Noticed I did not use full of my SD card. To extend, use raspi-config for easy configuration,

sudo raspi-config
expand_rootfs

That's it.

Another method to connect vnc

Sometimes we need to connect for vnc without display. I altered the script /etc/lightdm/lightdm.conf removing to use /etc/X11/xinit/xserverrc and set xserverrc as this,

exec Xvfb :0 -screen 0 1280x768x16


Also run the script anytime necessary.
#/bin/sh
sudo /usr/sbin/lightdm &
sudo /usr/bin/x11vnc -xkb -auth  /var/run/lightdm/root/:0 -rfbauth /etc/x11vnc.pass -forever -rfbport 5900 -o /var/log/x11vnc.log -loop

Although I don't know how it works, it does.