Leon Kos

Leon Kos

Leon Kos is a 25+ years
veteran of using Linux desktop on a daily basis to build digital
relationships for research, teaching, and getting the job done by programming.

Location Slovenia

Activity

  • @GiuseppeStumpoSammarco Before going to figure out what's not working with Hadoop please assure that SSH is working properly (i.e. no confirmations needed to connect to slave).

  • In principle this is possible by changing some configs.

    Before that you need to create virtual network between the VMs, use bridged network or redirect ports through NAT so that ssh and other services are passed through. For SSH it is advised to overcome key checking by adding to /etc/ssh/ssh_config

    Host cn??* osboxes*
    StrictHostKeyChecking=no
    ...

  • Probably you have too old 32 bit machine that can't run 64bit. Please apply for out cluster access now as explained in Week 3.

  • Well, shutdown without sudo is a special case allowing user to click to halt the machine.

  • @IanAdam You need to type exit to get back to normal user.

  • When you type sudo -i and then password hadoop you get super powers.

  • I have updated the article with bottom-left. Thanks for noting this.

  • I have updated the article so that it is clear you need to type `cat /root/.profile`

  • Then the VM disk got corrupted as you probably didn't shutdown the VM correctly. Please re-import the VM.

  • You have probably just renamed the compressed file downloaded. Please use FIle-Import in VirtualBox Manager.

  • The error you are having may be due to wrong processor, BIOS setup or virtual disk problems.
    Can you explain what host machine you have?

  • @1) The meaning of */* means to include in search all files in all subdirectories. If you don't have any subdirectory then */* will not expand in shell and would mean a */* literally as a file which cannot exist and that's why you get such message. See "man 7 glob"
    @2) \*.c* prevents "globing" of files you may have in current directory. If you don't have any...

  • Guest additions can be updated without impacting machine operation. Remote display server can be disconnected too.

  • You can simply delete the machine from the VirtualBox menu including the virtual disk and then uninstall VirtualBox itself.

  • Just use 7-zip and start unpacking the first. The remaining will be included automatically.

  • Try to download the image splitted in files. See https://bscw.lecad.fs.uni-lj.si/pub/bscw.cgi/227611 and combine them with 7-zip

  • Dear Lukasz, I have created 1GB splitted 7Zip files in directory nearby OVA now. You will get checksum verified when un7Ziping. See https://bscw.lecad.fs.uni-lj.si/pub/bscw.cgi/227611
    Some browsers might have problems with downloading files larger than 2GB. At least I know for Firefox 2GB upload limit.

  • We could establish torrent seed but we decided not to as our server is 10 Gbit capable. However, we will rethink if many such problems/requests will be reported. OVA file is compressed. ZIP split can be provided.

  • True. Cloudera quickstart is using "old" Linux base where R an Rhadoop an RStudio just didn't install. Not to mention resources needed to run it.

  • Sorry. You'll need 64bits host machine.

  • I guess you have incomplete download of OVA file. Check SHA or MD5 sum.

  • I have lowered VM memory to 2GB and one core and everything works. Please got to Settings->Display->Remote screen and disable it. Report if that helps for you.

  • I have just downloaded the image over WiFi on my macbook pro OSX 10.11.6 with the very same VirtualBox Version 5.1.18 r114002and everything works. Therefore, I would look at some hardware requirements.

  • sha256 sum above is correct!

    I have added md5sum nearby OVA file on the server so that you may use Terminal in OSX and type md5 mint-hadoop.ova to check if the machine was downloaded correctly.