Enable Wifi Dongle in Raspberrypi OSMC

Go to the command line interface of OSMC. Click the Power Icon. Select Exit, wait for the OSMC logo then press ESC.
Use username: osmc password: osmc

 Run the following Command:

 connmanctl  
 technologies  
 enable wifi  
 scan wifi  
 agent on  
 services  
 connect wifi_xxxxx #it will be a long string, hit tab for completion  

ref: https://osmc.tv/help/wiki/console
      https://discourse.osmc.tv/t/enable-wifi-under-gui/430/6

How to get the last IP address on the Subnet using Ruby

 >> require 'ipaddr'  
 >> ip=IPAddr.new("192.168.1.0/24")  
 => #<IPAddr: IPv4:192.168.1.0/255.255.255.0>  
 >> gateway=IPAddr.new(ip.to_range.last.to_i-1,ip.family).to_s  
 => "192.168.1.254"  
 >> ip=IPAddr.new("192.168.1.0/20")  
 => #<IPAddr: IPv4:192.168.0.0/255.255.240.0>  
 >> gateway=IPAddr.new(ip.to_range.last.to_i-1,ip.family).to_s  
 => "192.168.15.254"  

KVM Commands

To install with prompt

 virt-install --prompt  

List virtual machine

 virsh list 

Stop virtual machine

 virsh destroy

Configure VM autostart

 virsh autostart

Unconfigure VM autostart

 virsh autostart --disable

To install using kickstart

 virt-install --name=rhel03.localdomain -r 768 --disk path=/var/lib/libvirt/images/rhel03.localdomain.img,size=8 -l http://192.168.122.1/pub/inst -x "ks=http://192.168.122.1/pub/ks/rhel03.cfg"

To create VM snapshot

 virsh save centos01 centos01.snap.$(date +%y%m%d)

To restore VM snapshot

 virsh shutdown centos01  
 virsh restore centos01.snap  

Clone vm

 virt-clone --original centos01 --name centos02 --file /home/penoycentral/images/centos02.img  

Troubleshooting KVM

Error when starting the VM snapshot
error restoring domain unable to read from monitor


To fix

 virsh managedsave-remove domain-name  

Raspoison

This is an old blog entry but hopefully still relevant to some. Setting up a web kiosk system using raspberrypi+raspbian+ratpoison.This instruction assumes that you already installed raspbian on your SD card

sudo apt-get update  
sudo apt-get ratpoison  
sudo apt-get chromium  
sudo apt-get x11vnc  
sudo apt-get install x11-xserver-utils  

Start user pi at startup

 pi@raspberrypi:~$ grep pi /etc/inittab   
 1:2345:respawn:/bin/login -f pi tty1 /dev/tty1 2>&1  
 pi@raspberrypi:~$ cat /home/pi/.bash_profile   
 if [ -z "$DISPLAY" ] && [ $(tty) == /dev/tty1 ]; then  
 startx  
 fi  

Set ratpoison's config file

 pi@raspberrypi:~$ cat /home/pi/.xinitrc  
 exec ratpoison  
 pi@raspberrypi:~$ cat /home/pi/.ratpoisonrc  
 banish  
 exec xset s off  
 exec xset -dpms  
 exec unclutter -root  
 exec x11vnc -loop  
 exec /usr/bin/chromium --kiosk http://www.penoycentral.net  

Remotely connec thru vnc

 vncviewer raspberrypi.local  

You can try to test my Puppet module from github

Simulation Lab

Simulation lab

Host:

Toshiba Laptop

Processor: Intel Corei7

Memory: 16G

Harddisk: Samsung SSD 256Gb

Operating System: Windows 8

Virtual Machine Software: VMware Workstation 9

Virtual Machines

pfsense : Nat Firewall/VPN

spacewalk: yum repository

Foreman: Configuration management

Centos1: host 1

Spacewak

Channel sync

spacewalk-repo-sync --channel lab-local-centos-66

ref:
http://www.itzgeek.com/how-tos/linux/centos-how-tos/configuring-spacewalk-upoading-content-on-spacewalk-in-centos-6-rhel-6.html

 http://www.thenoccave.com/2012/03/29/install-spacewalk-client-on-centos-6/