Using cat,ssh and dd to copy ISOs

Hi!
After a long time without posting on the blog here I come again with a tiny command line that can speed up the usual method of copying large amounts of data.

Sometime ago a college gave me a DVD that I would like to keep to myself but that other 2 colleges wanted too. I used dd, cat and ssh for the task. Taking less that 5 minutes to do it all.

First I started the .iso creation with dd:

dd if=/dev/cdrom of=/home/pedro/my_new_iso.iso

In other console you may start the copy of the iso file even if the iso it’s fully copied to the hard drive (just give a few seconds to have some data copied to the drive):

(cat /home/pedro/my_new_iso.iso | ssh user@remote.host.local dd of=~/my_new_iso.iso) ; (cat /home/pedro/my_new_iso.iso | ssh user2@remote2.host.local dd of=~/my_new_iso.iso)

The only thing you need to guarantee is that the first command ends before the second one.
Cheers,
See you all next time

Hobao Hyper 9.5 GL review – from a user point of view

Last time I wrote about the Hobao Hyper 9  I was waiting the 9.5 arrival. It did arrived and I managed to put a gallon on it on practice plus a weekend competition. The competition didn’t go that well but it wasn’t the cars fault, just did practice and qualifications having to leave afterwards.

But lets go to what matters, how’s the Hyper 9.5 GL behaving and what are the new features?

Hyper 9.5 GL has some big improvements on its predecessor the Hyper 9 here’s a list:

  1. 4mm thick + 4mm longer rear lightweight chassis
  2. CNC Front chassis brace
  3. CNC Rear chassis brace
  4. Spider diff (front 5000, center 3000, rear 1000)
  5. 20 Degree engine mount
  6. CNC Coordinator mount
  7. 17mm (20mm) Big Bore shock set
  8. White spring set
  9. CNC one piece shock top cap set
  10. Fiber brake disc set up
  11. Front +2mm wheel hubs
  12. Rear +4mm wheel hubs
  13. Rear 3mm stabilizer
  14. Dust proof wheel nuts
  15. Proline 9024 tires

In my opinion on this list of upgrades from the hyper 9 to the 9.5 the really important ones are:

  1. 4mm thick + 4mm longer rear lightweight chassis
  2. CNC Front chassis brace
  3. CNC Rear chassis brace
  4. 17mm (20mm) Big Bore shock set
  5. White spring set
  6. Dust proof wheel nuts

With the new chassis and braces I’ve been damaging lot less parts than I had with the Hyper 9, specially the center dogbones and plastics, the new shocks are also great in handling as the new springs. The dust proof wheel nuts aren’t just a fancy upgrade they do help a lot preventing dust inside the nuts making it faster to replace or upgrade parts on the track.

About all the other improvements they work really well the brakes are much better, tiny springs where added to the brake pads this makes the brake free as soon as you hit the accelerator. The differential as better too, although I didn’t complain on the previous ones.

What I didn’t enjoy that much and reverted to the setting of the hyper 9 was the engine mount, I like the 25 degrees engine mount better, in my opinion the car handles better, but maybe it’s just me that I’m used to the older mount.

About the handling, what can I say, I loved the car before can’t deny it, but now I love it even more (my wife will kill me for saying this) but the handling in curve is better with the new chassis, the life cycle of parts is improved, I ran the gallon and the track weekend with almost no maintaince other than changing shock springs for tunning, and some minor setups (specially on the brakes). I’ve also noticed that with the with the white springs I can go faster on the corners without rolling. I also enjoy the gray ones for tracks that doesn’t have that many jumps.

What more can I say about the car, not much, just a little comparison I’ve been driving an HotBodies D8 and a Kyosho MP9 and compared to the D8 I like the Hyper 9 much more but compared to the Kyosho… well the Kyosho is a really nice car too, it’s fast and small like the Hyper, they both fly well and turn well in the long run I think the Hyper may have some advantage in what matters to shocks and turning speed, in accelaration they both perform very well but i think with the kyosho you can accelerate a bit sooner existing the corners, but this is just a thought, didn’t do an extensive test.

I’m more experienced with the hyper and it shows on lap times, but with the Kyosho I’m a second and a half slower, maybe due to the lack of habit driving it, with the D8 well… I’m three and a half seconds slower…and I’m equally used to it as I am with the Kyosho MP9.

In conclusion I think the Hyper 9.5 GL a great evolution on the hyper, it’s not that cheap nor it’s a car free of trouble, but is one of the best RC cars out there at least that I’ve drove, on the bottom end I really dislike the access to electronics as you have to take out the break linkage to change battery or do something else in the box, but well perfection doesn’t exist 😉

Cheers,

Pedro Oliveira


Kde 4.3 – Innovation or just patching?

Recently I upgraded my KDE version 4.2 to the 4.3 and I’ve been using it for a few days now. As said before I don’t mind using betas and do some testing, but as with everything there is an exception, in my case it was KDE, I used the first KDE4 betas and come back to 3.5 then used the 4.1 when it was stable, then 4.2 and tried the beta 4.3… once again came back to the 4.2, now that is stable I’m using version 4.3, and for the first time in KDE4 I can say it’s stable. In my opinion KDE4 was released way to early, and although usable it was needing serious work around it. I’m a Linux user with several years of experience and didn’t have much trouble using it, but for instance my wife would go crazy, so till KDE4.3 she was using KDE3.5.

What changed in this last version of KDE that made me upgrade all my machines to KDE4.3?

The KDE community has fixed over 10,000 bugs.

Implemented almost 2,000 feature requests in the last 6 months.

Close to 63,000 changes were checked in by a little under 700 contributors.

If you want to read more about it just check this link.

All this made KDE4.3 more user friendly, more reliable, more polished and prettier.

So, what more can I say about it? JUST INSTALL IT AND GIVE A TRY you won’t be disappointed.

In conclusion is there innovation or just patching in KDE 4.3? Definitely both, there’s hundreds of new features and even more bug fixes. Both are equally important and KDE really need this ultimate push to be the ultimate Desktop Manger.

Cheers and see you next time

Pedro Oliveira

ps – bellow there are the install instructions and a vid of kde4.3 in action.

If you need help to install it just check the install instructions (from www.kde.org):

Debian KDE 4.3.0 packages are available in the unstable repository.

  • Fedora
    • Rawhide development repository, however the packages there may depend on other Rawhide packages and are therefore not suitable for installation on previous releases.
    • Unofficial Fedora 11/10 packages are hosted at the kde-redhat project.
    • Kubuntu packages are available for 9.04. More details can be found in the announcement on Kubuntu.org.
    • Mandriva provide packages for
2009.0 i586 2009.0 x86_64 2009.0 SRPMS
2009.1 i586 2009.1 x86_64 2009.1 SRPMS

Please refer to README to more information.
For Mandriva Cooker ( development ) users, 4.3.0 is will be available at cooker repositories.

openSUSE packages are available for openSUSE 11.1 (one-click install), for openSUSE 11.0 (one-click install) and for openSUSE 10.3 (one-click install) and openSUSE Factory (one-click install). A KDE Four Live CD with these packages is also available.

Magic Linux KDE 4.3.0 packages are available for Magic Linux 2.5. See the release notes for detailed information and the FTP tree for packages.