October « 2012 « Matt’s Blog

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8Oct/12Off

Perfect Ubuntu 12.04 Server sources.list

It turns out that my Ubuntu 12.04 Server edition installation had an incomplete sources.list file. It only referenced packages from the CD-ROM. At this site, I found an complete sources.list file that contains the various package types that are supported by Precise Pangolin,

# deb cdrom:[Ubuntu-Server 12.04 LTS _Precise Pangolin_ - Release amd64 (20120424.1)]/ dists/precise/main/binary-i386/
# deb cdrom:[Ubuntu-Server 12.04 LTS _Precise Pangolin_ - Release amd64 (20120424.1)]/ dists/precise/restricted/binary-i386/
# deb cdrom:[Ubuntu-Server 12.04 LTS _Precise Pangolin_ - Release amd64 (20120424.1)]/ precise main restricted
 
#deb cdrom:[Ubuntu-Server 12.04 LTS _Precise Pangolin_ - Release amd64 (20120424.1)]/ dists/precise/main/binary-i386/
#deb cdrom:[Ubuntu-Server 12.04 LTS _Precise Pangolin_ - Release amd64 (20120424.1)]/ dists/precise/restricted/binary-i386/
#deb cdrom:[Ubuntu-Server 12.04 LTS _Precise Pangolin_ - Release amd64 (20120424.1)]/ precise main restricted
 
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://de.archive.ubuntu.com/ubuntu/ precise main restricted
deb-src http://de.archive.ubuntu.com/ubuntu/ precise main restricted
 
## Major bug fix updates produced after the final release of the
## distribution.
deb http://de.archive.ubuntu.com/ubuntu/ precise-updates main restricted
deb-src http://de.archive.ubuntu.com/ubuntu/ precise-updates main restricted
 
## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb http://de.archive.ubuntu.com/ubuntu/ precise universe
deb-src http://de.archive.ubuntu.com/ubuntu/ precise universe
deb http://de.archive.ubuntu.com/ubuntu/ precise-updates universe
deb-src http://de.archive.ubuntu.com/ubuntu/ precise-updates universe
 
## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team, and may not be under a free licence. Please satisfy yourself as to
## your rights to use the software. Also, please note that software in
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb http://de.archive.ubuntu.com/ubuntu/ precise multiverse
deb-src http://de.archive.ubuntu.com/ubuntu/ precise multiverse
deb http://de.archive.ubuntu.com/ubuntu/ precise-updates multiverse
deb-src http://de.archive.ubuntu.com/ubuntu/ precise-updates multiverse
 
## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
deb http://de.archive.ubuntu.com/ubuntu/ precise-backports main restricted universe multiverse
deb-src http://de.archive.ubuntu.com/ubuntu/ precise-backports main restricted universe multiverse
 
deb http://security.ubuntu.com/ubuntu precise-security main restricted
deb-src http://security.ubuntu.com/ubuntu precise-security main restricted
deb http://security.ubuntu.com/ubuntu precise-security universe
deb-src http://security.ubuntu.com/ubuntu precise-security universe
deb http://security.ubuntu.com/ubuntu precise-security multiverse
deb-src http://security.ubuntu.com/ubuntu precise-security multiverse
 
## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
# deb http://archive.canonical.com/ubuntu precise partner
# deb-src http://archive.canonical.com/ubuntu precise partner
 
## Uncomment the following two lines to add software from Ubuntu's
## 'extras' repository.
## This software is not part of Ubuntu, but is offered by third-party
## developers who want to ship their latest software.
# deb http://extras.ubuntu.com/ubuntu precise main
# deb-src http://extras.ubuntu.com/ubuntu precise main

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7Oct/12Off

Install Ubuntu 12.04 LTS from USB, installer couldn’t mount CD-ROM

I recently attempted to install Ubuntu 12.04 LTS Server from a USB and encountered a weird problem. After downloading the Ubuntu ISO image, I utilized the Universal USB Installer from pendrive.com to make my USB stick bootable.

The USB stick booted fine and I began the installation process. However, very quickly, the installer presented me with the following error message,

Your installation CD-couldn't be mounted. This probably means that the CD-ROM was not in the drive. If so you can insert it and try again Retry mounting the CD-ROM?

I'm not sure what causes the above error, but, here is how to overcome this obstacle.

Copy the ISO image to the USB stick and attempt to install Ubuntu again. When the above error message appears, select "No" and then issue the following commands:

Press Alt+F2, <ENTER>
 
mkdir /media/usb
mount -t vfat /dev/sdb /media/usb
mount -t iso9660 -o loop /media/usb/ubuntu-12.04-server-amd64.iso /cdrom
 
Press Alt+F1

Where /dev/sdb is the device for your USB stick. You may have to explorer other devices. Try typing ls /dev/sd* to see the available drives if you encounter troubles here. The idea is that we'll manually mount the CD-ROM drive ourselves and then let the installer resume as if nothing out of the ordinary has happened. So, after the ALT+F1, simply select,

Load debconf preconfigruation file

from the menu and the installation will resume. Good luck.

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6Oct/12Off

bind9 with journal

I recently wanted to update my now journalized bind9 DNS server. This blog entry helped me update my zone which has been configured for dynamic updates.

http://www.aossama.net/orking-with-a-journal-ized-bind-zone

Here is the process for updating bind9 when using a journal,

sudo rndc freeze ZONE
...modify zone files...
sudo /etc/init.d/bind9 restart
sudo rndc unfreez ZONE

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