Raspberry Pi

Installing Raspbian

1. Download Raspbian image from here.
2. Format SD card using FAT32.

sudo mkdosfs -F 32 -v /dev/mmcblk0

3. Install squashed file sistem on SD card.

sudo dd bs=4M if="/home/linux/2013-02-09-wheezy-raspbian.img" of=/dev/mmcblk0

Linux

Raspbian default username & password

By default the username and password are:
Username: pi
Passowrd:raspberry

WiFi setup

WPA2

1. Scan wifi networks available:

sudo iwlist wlan0 scan

2. Write down the ESSID (wifi network name) and IE (authentication used)
3. Edit /etc/wpa_supplicant/wpa_supplicant.conf, add the following at the bottom of the file.

network={
    ssid="The_ESSID_from_earlier"
    psk="Your_wifi_password"
}

4. If after a few seconds the Raspberry WiFi isn't connected:

sudo ifdown wlan0
sudo ifup wlan0 

interfaces

Edit /etc/network/interfaces

# /etc/network/interfaces
allow-hotplug wlan0
auto wlan0
iface wlan0 inet dhcp
wpa-ap-scan 1
wpa-scan-ssid 1
wpa-ssid "SSID"
wpa-proto RSN
wpa-pairwise CCMP
wpa-key-mgmt WPA-PSK
wpa-psk "PASS"

wpa_suplicant

Not Working: Edit /etc/network/interfaces

auto lo

iface lo inet loopback
iface eth0 inet dhcp

allow-hotplug wlan0
auto wlan0

iface wlan0 inet dhcp
        pre-up wpa_supplicant -Dwext -i wlan0 -c /etc/wpa_supplicant/wpa_supplicant.conf -B

Edit /etc/wpa_supplicant/wpa_suplicant.conf

ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1

network={
    ssid=NETWORK_NAME # it can be any encryption type, just make sure to add the "scan_ssid=1" line after your settings.
    psk=password_without_double_quotes
    scan_ssid=1
    mode=0
    protp=WPA2
    key_mgmt=WPA-PSK
    pairwise=CCMP
    group=CCMP
    auth_alg=OPEN
    id_str="raspII"
    priority=1

} 

Another example:

ctrl_interface=/var/run/wpa_supplicant
update_config=1
ap_scan=2
eapol_version=1
network={
        ssid="YOUR-SSID-GOES-HERE"
        scan_ssid=1
        mode=0
        proto=WPA2
        pairwise=TKIP
        group=TKIP
        key_mgmt=WPA-PSK
        psk="YOUR-PASSWORD-GOES-HERE"
}

Domain name setup

To change the domain server:
Edit /etc/hosts
Edit /etc/hostname
Commit changes by runing:
sudo /etc/init.d/hostname.sh

ssh rsa key setup

1. If you don't have an rsa key generate one by runing:

ssh-keygen -t rsa -C user@domain

2. Upload the .pub rsa key to the raspberry
3. Add the .pub key to ~/.ssh/authorized_keys

cat rsa_key.pub >> ~/.ssh/authorized_keys

Git server

1. Install Git:

sudo apt-get install wget git-core

2. Format an USB with FAT32, and connect it to the Raspberry (First turn off the raspberry)
3. Set up a mount point for the USB drive.
3.1 Create directory
3.2 Edit /etc/fstab, add line:

/dev/sda1 /home/pi/usbdrv vfat uid=pi,gid=pi,umask=0022,sync,auto,nosuid,rw,nouser 0 0

note: /dev/sda1 should correspond to usb drive you want to map, pi = user that will own the drieve. umask sets the permissions (substract from 7 the chmod octal value (to set rwx use 0...)
4. reboot Raspberry and check if the usb mounts correctly with lsblk
5. For each repository:
5.1 create a folder and cd into it.
5.2 git init --bare
5.3 add origin to your local git repository. Example:

git remote add pi pi@10.0.1.64:/home/pi/usbdrv/justdiedbot.git

5.4 push your repository into raspberry. Example: git push pi master

Disable sleep mode

The file /etc/kbd/config contains settings for non-x screen blanking.

change the following: BLANK_TIME=0 BLANK_DPMS=off POWERDOWN_TIME=0

Disable Realtek 8192cu WiFi Sleep Mode

Edit: /sys/module/8192cu/parameters/rtw_power_mgnt

cat /sys/module/8192cu/parameters/rtw_power_mgnt

If the file doesn't exist your WiFi adapter uses a diferent chip.
If it's set to:
1: Power safe is enabled
2: Power safe is disabled

Create a new file:

sudo nano /etc/modprobe.d/8192cu.conf

With the following content:

# Disable power management
options 8192cu rtw_power_mgnt=0

Then reboot. And it's done.

Print Server

Install CUPS

sudo apt-get update
sudo apt-get install cups

Add your raspberry user to lpadmin group.

sudo usermod -a -G lpadmin <user_name>

Log out and log in again for the changes to take effect.
If you are in a trusted network execute:

cupsctl --remote-any
sudo /etc/init.d/cups restart

Connect to the cups management via web browser:
http://raspberry_ip:631
Configure your printer.
To add scanner compatibility you must follow more steps explained in:
http://www.raspberry-pi-geek.com/Archive/2013/01/Converting-the-Raspberry-Pi-to-a-wireless-print-server

Keyboard Layout

sudo nano /etc/default/keyboard XKBLAYOUT="es"