raspberry pi short reference

Make SD disk - MAC OS X
Option 1
df -h
unzip ~/Downloads/2012-12-16-wheezy-raspbian.zip

diskutil list    //find the correct /dev/diskx
diskutil unmountDisk /dev/disk2 

sudo dd bs=1m if=~/Downloads/2012-10-28-wheezy-raspbian/2012-12-16-wheezy-raspbian.img of=/dev/disk1

sudo dd bs=1m if=~/Downloads/2017-03-02-raspbian-jessie.img of=/dev/disk2

CTRL T gives information about process

diskutil mountDisk /dev/diskx


Option 2
format disk met SDFormat option full
copy NOOB files on disk

Setup on SD
1 Place an empty file ssh in the root path in order to get ssh access
2 edit wpa_supplicant.conf add (file is removed after booting): 
ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1
network={
ssid="WIFI"
psk="Mysecret4"
scan_ssid=1
}

3 edit config.txt and add:
#Enable UART
enable_uart=1

4 boot and login with 
ssh pi@rasberry.local password raspberry

Setup
sudo raspi-config     // config screen
sudo apt-get update   // install new versions of software fetch the package list
sudo apt-get upgrade  // will fetch new versions of packages existing on the machine
sudo apt-get dist-upgrade //same as upgrade but also dependencies
reboot

Network
sudo nano /etc/network/interfaces




iface eth0 inet static //static 
 address 192.168.1.2 
 netmask 255.255.255.0 
 gateway 192.168.1.1

iface eth0 inet dhcp    //DHCP

allow-hotplug wlan0         //wifi
iface wlan0 inet dhcp
wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf

sudo more /etc/wpa_supplicant/wpa_supplicant.conf

ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1
network={
ssid="NAMEWIFIROUTER"
proto=RSN
key_mgmt=WPA-PSK
pairwise=CCMP TKIP
group=CCMP TKIP
psk="password"


Multiple networks 
/etc/wpa_supplicant/wpa_supplicant.conf  
ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1

network={
    ssid="SCHOOLS NETWORK NAME"
    psk="SCHOOLS PASSWORD"
    id_str="school"
}

network={
    ssid="HOME NETWORK NAME"
    psk="HOME PASSWORD"
    id_str="home"
}

/etc/network/interfaces
auto lo

iface lo inet loopback
iface eth0 inet dhcp

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

iface school inet static
address
gateway
netmask

iface home inet static
address
gateway
netmask

  Network problems 

1 Check that the hardware is connected (lights on both ends) or with iwconfig wlan0 (for WiFi)
2. Check that the kernel can see the hardware with:
ifconfig -a
3. Check that you active interface has an IP address 
ifconfig eth0 
ifconfig wlan0

4. Check the kernel routing table 
route -n (or ip route)

sudo route add default gw 192.168.2.1 wlan0

5. Check you can ping your gateway (you get the gateway address from the route command)
ping 192.168.2.1
6. Check you can ping 8.8.8.8 (Google's DNS server)
ping 8.8.8.8
7. Check you can resolve host names (ping google.com)


Simple Unix command
ls            //list files
pwd
which  pwd    //where is my pwd command
lsusb         //show USB devices
cp   file1 file2    // copy
mv   file1 file3    // rename of move
df -h               // show mounted filesystems


AFP

sudo apt-get install netatalk

in Finder hit ⌘K. Enter afp://192.168.2.150

Samba
sudo apt-get update
sudo apt-get install samba
sudo apt-get install samba samba-common-bin
nano /etc/samba/smb.conf        //edit config file 
sudo service samba restart      //iedere keer als je iets veranderd

[global]
workgroup = workgroup
server string = %h
wins support = no
dns proxy = no
security = share
encrypt passwords = yes
panic action = /usr/share/samba/panic-action %d

[sites]
path = /mnt/data
writeable = yes
broweable = yes
read only = no
guest ok = yes
force user = root

sudo smbpasswd -a john             //add samba user 
sudo mkdir /mnt/data
sudo chmod 777 /mnt/data


Change host name
sudo nano /etc/hostname 
sudo nano /etc/hosts 

sudo reboot    //reboot
sudo halt      //stop

sudo adduser john         // make new user
sudo adduser john sudo    // make user sudo
sudo nano /etc/sudoers

sudo fdisk -l             // show attached drives



Add hard disk
sudo apt-get install ntfs-3g   //install Read NTFS 
sudo apt-get install hfsplus
sudo blkid                // show all 
nano /etc/fstab           // mount at start up
/dev/sd       /mnt/data       ntfs    defaults        0       0
sudo mount -a 


Video Web cam
sudo apt-get install motion
sudo nano /etc/motion/motion.conf

daemon  ON

webcam_localhost  OFF

sudo service motion start
sudo nano /etc/default/motion 
http://192.168.2.111:8081

sudo apt-get install python-opencv


VNC  remote desktop 
apt-get install tightvncserver

tightvncserver

vncpasswd

vncserver :1 -geometry 800x600 -depth 24

if server is started on 1 this means port 5901
in finder (connect icon)  vnc://192.168.2.70:5901




Apache webserver
sudo apt-get install apache2
sudo nano /etc/apache2/sites-enabled/000-default
AddHandler cgi-script .py
sudo chmod 777 /usr/lib/cgi-bin/test.py


special raspberry ROM's / images:

MotionPi: use the camera for spying or for video

ssh root@192.168.2.181
use password after the dash name router

use find to find IP adres of the raspberry 
Safari: 192.168.2.1
admin ; no password
use vi for editing files 
set wifi password and SIID of the router in /data/etc/wpa_ ... 

Sound
sudo apt-get install alsa-utils
sudo apt-get install mpg321
sudo apt-get install lame

Node-RED
https://nodered.org/docs/hardware/raspberrypi
(curl -sL https://raw.githubusercontent.com/node-red/raspbian-deb-package/master/resources/update-nodejs-and-nodered)

node-red-start

In safari 192.168.2.70:1880

npm install node-red-node-mongodb

mongo
sudo apt-get install mongodb-server

sudo nano /etc/mongodb.conf             //edit config paths 
/var/log/mongod                       // look into the logs

mongod                                // start server
mongod --dbpath /data/db --repair     // repair if RPi shutdown un
mongo
show dbs                              // show databases
use Mydb
show collections                      // show collections
db.createCollection(“my collection”)  // Make a collection
db.mycollection.remove()              // remove collection

db.addUser( { user: "joe",
... pwd: "secret",
... roles: [ "readWrite", "dbAdmin" ]
... } )
http://192.168.2.70:28017             //Webinterface