Mimor » server http://mimor.be Almost weekend! Wed, 18 Jan 2012 10:50:47 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 Ubuntu Server on VirtualBox returns error This kernel requires the following features not present on the cpu: 0:6 http://mimor.be/2009/ubuntu-server-onn-virtualbox-returns-error-this-kernel-requires-the-following-features-not-presnet-on-the-cpu-06/ http://mimor.be/2009/ubuntu-server-onn-virtualbox-returns-error-this-kernel-requires-the-following-features-not-presnet-on-the-cpu-06/#comments Mon, 24 Aug 2009 15:20:36 +0000 Mimor http://mimor.be/?p=425 I installed Ubuntu Server 8.04 inside a VirtualBox (v 2.4.1_OSE) virtual machine.
The installation went smooth, but when I wanted to boot into my Ubuntu Server, it returned the following error right after GRUB:

This kernel requires the following features not present on the cpu: 0:6
Unable to boot – please use a kernel appropriate for your CPU

Screenshot or it didn’t happen?

Ubuntu Server on VirtualBox returns error

How to solve:

This can be easily resolved by enabling the PAE/NX option in the virtual machine’s settings.
This will expose the PAE of your CPU to the virtual machine.

Just:

  1. go to the homescreen of Virtualbox
  2. select your virtual machine
  3. click the ‘settings’ button on top of the screen
  4. click the tab ‘Advanced’
  5. check the box next to ‘PAE/NX’

Like in this screenshot:

Screenshot-testserver - Settings-1

Now, you can fire up your virtual machine again, and it will start up without this error.

]]> http://mimor.be/2009/ubuntu-server-onn-virtualbox-returns-error-this-kernel-requires-the-following-features-not-presnet-on-the-cpu-06/feed/ 0 Weird requests on the website http://mimor.be/2009/weird-requests-on-the-website/ http://mimor.be/2009/weird-requests-on-the-website/#comments Sun, 24 May 2009 15:26:30 +0000 Mimor http://mimor.be/?p=207 I was looking at the stats for mimor.be and I was a bit surprised to see these easy attempts to compromise data from the website.
There were several 404 errors returned on files with names such as:

  • /packet.mdb
  • /wwwroot.zip
  • /shop.rar
  • /shop.zip
  • /site.rar
  • /web.rar
  • /web.zip
  • /www.zip
  • /www.rar
  • /tomdb.mdb
  • /shop.mdb
  • /shoes.rar
  • /wwwroot.rar
  • /HSH.mdb
  • /site.zip
  • /HYTop.mdb

The fact that some people put effort & time in such web-crawling means that they have results on this.
So folks, plz stop putting database-files & backup-files in your publicly-accessible folders! This is the only remedy against such “attacks”.

Whilst I’m on web-security, let me remind you of some other dangerous things when hosting a website:

  • Use SFTP instead of FTP!  (FTP sends data & passwords unencrypted over the big bad Internet).
  • Do not use password protected directory’s on Microsoft IIS servers.
  • Manage Database and web/ftp users on a strict base. (unused logins should be removed).
  • Keep an eye on the log-files of the server.
  • If you don’t know how to program, first learn it!
  • Be careful when installing plug-ins/scripts from someone else. First review the code and user comments on it!
  • Remove unused packages/software/scripts from the server, they might form a major security leak.
  • Do not put passwords and other personal data on free webhosting spaces.
  • Be careful what tools you use. Some, such as Filezilla store usernames, passwords and other valuable credentials in an xml file (clear text) in an unencrypted directory.
  • etc …

These are security issues that are verry common, as most people tend  to think that a safe hosting/code is enough to secure a website.

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