Posts Tagged ‘Ubuntu’

How to Encrypt Partition under Ubuntu 11.10

Friday, December 9th, 2011

Here is a quick how-to for password protecting and encrypting your partition using cryptsetup under Ubuntu/Kubuntu Oneiric Ocelot. It should work for older versions too but haven’t tested it.

cryptsetup luksFormat /dev/sdaX
 
cryptsetup luksOpen /dev/sdaX cryptname
 
mkfs.ext4 /dev/mapper/cryptname
 
echo 'cryptname /dev/sdaX none luks' >> /etc/crypttab
 
mkdir /media/cryptname
 
echo '/dev/mapper/cryptname /media/cryptname ext4 defaults 0 2' >> /etc/fstab

Obviously you have to be root and have cryptsetup installed.
PS: I’m NOT responsible for any damage or data loss caused by executing the supplied code.

VMware Player / Workstation Mouse Grab Input Focus Bug

Tuesday, September 22nd, 2009

To fix the recent bug with VMware Player 2.5.3 and Workstation 6.5.3 Build 185404 under Karmic Koala Ubuntu just paste this line in your console before launching vmplayer/vmware:

export VMWARE_USE_SHIPPED_GTK=yes

you may also modify the VMware starting script so you don’t have to export it every time.

MDADM RAID Failed After Upgrade from Ubuntu 8.10 to 9.04

Friday, April 24th, 2009

With no surprise the update from Interpid Ibex to Jaunty Jackalope was not as easy as I hoped. After booting the fresh 2.6.28 kernel I was welcomed with “Press enter for maintenance (or type Control-D to continue)” and errors when trying to mount my RAID0. After some investigations found that the devices are now named md_d* and there are some devices in /dev/md/.  Because of this change I had to do the following things to get my raid up and running:

  1. Reassemble the raid (check if it is inactive with less /proc/mdstat) – in my case the command looked like this: mdadm --assemble /dev/md_d1 /dev/sdb2 /dev/sda5
  2. mdadm --detail --scan >> /etc/mdadm/mdadm.conf and comment your previous ARRAY definition in the config file
  3. Modify /etc/fstab if needed

Also if DKMS fails to build the new NVIDIA driver be sure to check that you have installed the headers files (the upgrade process did not install them for me).

Again : I’m NOT responsible for any damage or data loss you might experience. Backup often, backup soon!

VMware Player / Workstation Keyboard Mapping Problem

Monday, January 5th, 2009

After switching from Debian Unstable to Kubuntu 8.10 I reinstalled my VMware Player 2.5.1 and started my Windows XP virtual machine. Soon I found that most of the keys near the numeric pad (del, home, right enter, etc) are either not working at all or doing wrong things. The obvious reason was some wrong keyboard mappings.

Solution:

$ echo 'xkeymap.nokeycodeMap = true' > ~/.vmware/config

or if the config already exists

$ echo 'xkeymap.nokeycodeMap = true' >> ~/.vmware/config

More info here