10Gbps backbone
Arnold Santos
trevor storr
Download and Install Lubuntu x32 12.04 LTS
tick download updates while installing
install third party software
erase disk and install
Who are you - create an account
whsadmin --note cannot use admin as this is a system account. I chose whsadmin.
enter a password
do not tick auto login
install takes a while - go and have several coffees
Restart the machine, remove the CD, set proxy details and install remainder of software
login as whsadmin
set the update proxy. This is required if your internet connection uses a proxy server.
sudo nano /etc/apt/apt.conf
and add this:
Aquire::http:Proxy”http://username:password@http://proxyipaddress:port/”;
save and exit by doing ctrl o (enter), ctrl x (enter)
add additional proxy statements for root user
sudo mc
add the following line to /etc/environment
export http_proxy=”username:password@http://proxyipaddress:port/”
and add the following to /root/.bashrc
http_proxy=http://username:password@http://proxyipaddress:port/
export http_proxy
now update the software
sudo apt-get update
sudo apt-get upgrade
sudo apt-get install lubuntu-restricted-extras -y (accept the license agreements, but note that some software will not download behind an authenticated proxy. We will get around this by using google chrome with it’s onboard flash)
sudo apt-get install acpi-support acpid
sudo apt-get install mc
Create the student user
Create a user that will be used by learners. Later on we will auto login this account.
system tools ->users and groups. Name astudent, advanced, user privileges allows access to printers etc. We did not set these as we want a simple internet kiosk.
Set the screensaver
Preferences -> screensaver ->random screensaver
Download and install chrome browser
Chrome browser comes with in-built flash. Download it from https://www.google.com/intl/en/chrome/browser/ .
Ensure you choose the correct version for 32 bit processors. To download chrome behind an authenticated proxy, start chromium with the proxy option.
chromium-browser --proxy-server=http://proxyipaddress:port
Download google chrome from the above link.
Double click the downloaded deb file to install it. You will be prompted for sudo users password.
Autologin the astudent user
sudo nano /etc/lightdm/lightdm.conf
add the following lines
autologin-user=astudent
autologin-user-timeout=0
ctrl o and ctrl x to exit.
Autostart chrome as the user astudent is logged in
sudo mkdir /home/astudent/.config/autostart
sudo nano /home/astudent/.config/autostart/chromekiosk.sh
add the following to the chromekiosk.sh
#!/bin/bash
xscreensaver -nosplash &
cat ~/.config/google-chrome/Default/Preferences | perl -pe "s/\"bottom.*/\"bottom\":$(xrandr | grep \* | cut -d'' -f4 | cut -d'x' -f2),/" > ~/.config/google-chrome/Default/Preferences
cat ~/.config/google-chrome/Default/Preferences | perl -pe "s/\"right.*/\"right\":$(xrandr | grep \* | cut -d'' -f4 | cut -d'x' -f1),/" > ~/.config/google-chrome/Default/Preferences
while true; do google-chrome www.waimatehigh.school.nz --new-window gmail.com --new-window google.co.nz --incognito --proxy-server=http://192.168.10.4:3128 --start-maximised --window-size=1280,1024; sleep 5s;
done
save the file, ctrl o, ctrl x
make it executable
sudo chmod 755 /home/astudent/.config/autostart/chromekiosk.sh
run the chromekiosk script on startup
add the following line to /etc/xdg/lxsession/Lubuntu/autostart and to /etc/xdg/lxsession/Lubuntu-Netbook/autostart using nano
@/home/astudent/.config/autostart/chromekiosk.sh
sudo nano /etc/xdg/lxsession/Lubuntu/autostart
sudo nano /etc/xdg/lxsession/Lubuntu-Netbook/autostart
once the line has been added, ctrl o, ctrl x
Remove unwanted menu items from the astudent account
Log in to the astudent account
right click on the taskbar, add/remove items
Download and install ofris script to recreate a ‘clean’ astudent desktop at boot time
download gofris from sourceforge.net/projetcs/dafturnofris-id/
extract into your downloads folder (available from the right-click context menu)
run the script.
sudo /home/whsadmin/Downloads/dafturn-ofris.sh
Choose option 2, enter the name of the user you wish to ‘Deep freeze’ (astudent)
exit
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Trevor
Trevor Storr
Director of eLearning, CantaNET http://educo.vln.school.nz
Waimate High School
Waimate
New Zealand
Patrick Dunford
trevor storr
Arnold Santos
.ICT Systems Administrator
Queenstown Primary School
________________________
Apple Certified Support Professional 10.8
gre...@staff.cbhs.school.nz
Do clients collectively have a reduced demand for bandwidth when being served by the cloud?
- Ben.
Arnold Santos
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Tim Harper
regards,
Tim Harper
Phone 0800 755 966 option 2 then 3 (SchoolZone)
Phone 03 443 5167 (DDI)
Mobile 027 443 1236
Fax 03 443 0491
t...@mtaspiring.school.nz
www.mtaspiring.school.nz
gre...@staff.cbhs.school.nz
Indeed, with your internet connection being the bottleneck for internet services, more-so with each service that you move to the cloud (after considering the pros and cons), there is likely to be no benefit to a faster internal backbone.
But, consider that internet connection speeds increase by an order of magnitude every six years. Assuming that his holds true, a significant factor in your infrastructure design decision may be how long do you expect it to last? If you plan to replace every five years then there may be no point in 10gig this time around. If you want ten years from your network hardware then the opposite may be true.
I don't think there's a one-size-fits-all answer. The site topology is very significant - e.g.:
* If you have a large number of cabinets each serving a small number of clients, connected in a perfect star (ignoring any backup links) back to your comms and/or server room, then your "network backbone" may really be the backbone speed of the central switch stack which is going to be 10+gig already.
* If you have a branching tree type topology, a hand-me-down upgrade cycle may make (both economic and technical) sense, purchasing new inner-most switches only.
* They may be a choice-of-hardware option that allows key links to be upgraded to 10gig in the future without excessive wastage of investment.
If SNUP is involved, then the best plan is probably whatever they will fund.
- Ben.
trevor storr
Arnold Santos
Arnold Santos
Tim Harper
regards,
Tim Harper
Phone 0800 755 966 option 2 then 3 (SchoolZone)
Phone 03 443 5167 (DDI)
Mobile 027 443 1236
Fax 03 443 0491
t...@mtaspiring.school.nz
www.mtaspiring.school.nz
Julian Davison
Back in the day, AT was the ‘preferred provider’ though they were open to an alternative if a good case could be made for it – in the case I was involved in there was an existing infrastructure that was already at the required standard (though not as complete as desired) so using AT would have involved replacing many devices with new gear that really only differed in having the ‘AT’ badge on them.
Even if that’s not the norm any longer, always ask them J
Cheers, Julian
Julian Davison
Technical Consultant
Decision1 IT Solutions Ltd
PO Box 368
Dunedin
P 03 471 8232
F 03 471 8234
W www.decision1.co.nz
E jul...@decision1.co.nz
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