For a better ovvervie  I'll post the  4 scripts I mentioned above:

Script one is written by a presiding file into .bashrc with the preeeded user ubuntu.

#/!bin/bash
# Bootstrap for first installation and Update.
# This file have to be in loaded in the preseed file.

cat << EOF >> /home/ubuntu/.bashrc

if  [ ! -d /opt/.drubuntu ]; then
echo "We needd yourr password agin to finish the initial setup"
sudo mkdir /opt/.drubuntu;cd /opt/.drubuntu;
wget http://drubuntu.googlecode.com/git/scripts/getit.sh  >/dev/null 2>&1
chmod +x /opt/.drubuntu/getit.sh
./getit.sh
fi

if [ -f /opt/.drubuntu/.bash_aliases } then;
. /opt/.drubuntu/.bash_aliases
fi

EOF

The second script is the script that fetches and runs install.sh

#!/bin/bash
export username=`echo $LOGNAME`
DLURL=http://drubuntu.googlecode.com/git
DIRURL=/opt/.drubuntu
ISCRIPTSURL=/opt/.drubuntu/install
echo "We need your password to finish the initial setup"
sudo chown -Rh "$username" /opt/.drubuntu
echo "prepering initial set up"
mkdir $ISCRIPTSURL
wget -O $DIRURL/setip $DLURL/scripts/setip.sh >  /dev/null 2>&1
wget -O $DIRURL/setwallpaper $DLURL/scripts/setwallpaper.sh >  /dev/null 2>&1

wget -O $DIRURL/install.sh $DLURL/scripts/install/install.sh >   /dev/null 2>&1
wget -O $DIRURL/features $DLURL/features/features.sh > /dev/null 2>&1

wget -O $ISCRIPTSURL/copyfiles $DLURL/scripts/install/copyfiles.sh >  /dev/null 2>&1
wget -O $ISCRIPTSURL/deb-packages $DLURL/scripts/install/deb-packages.sh > /dev/null 2>&1
wget -O $ISCRIPTSURL/downloadfiles $DLURL/scripts/install/downloadfiles.sh >  /dev/null 2>&1
wget -O $ISCRIPTSURL/drupal7-core-setup $DLURL/scripts/install/drupal7-core-setup.sh > /dev/null 2>&1  
wget -O $ISCRIPTSURL/drupal8-core-setup $DLURL/scripts/install/drupal8-core-setup.sh > /dev/null 2>&1  
wget -O $ISCRIPTSURL/cleanup $DLURL/scripts/install/cleanup.sh >  /dev/null 2>&1

chmod +x $DIRURL/*; chmod +x $ISCRIPTSURL/*
sudo bash "$DIRURL"/install.sh
 

the third script runs the script where the mkdir command is present

#!/bin/bash
if [[ $UID -ne 0 ]]; then
   echo    "This script must be run as root, use sudo ./install.sh"
    exit 

  fi
echo "We'll now install all missing packages. This will take a while."
  ./install/deb-packages
# > /dev/null to hide the output

#uploadprogress setup

pecl install uploadprogress > /dev/null 2>&1;

#Check for uploadprogress

file="/etc/php5/conf.d/uploadprogress.ini"
if [ -f "$file" ]
then
echo "uploadprogress is already installed"
else
echo "extension=uploadprogress.so" >>/etc/php5/conf.d/uploadprogress.ini 
fi

#fetch required files

echo "Files needed will be downloaded now..."
./install/downloadfiles;
echo "Required files will be copied to their locations"
./install/copyfiles;

# grant previleges 

chown -Rh "$username":www-data /var/www; 
#create symbolic links
ln -s /var/www $HOME/public_html;

#setting up server

hostname drupal.site;
sudo a2enmod rewrite;
sudo a2dissite default;
sudo a2ensite drupal;
sudo service apache2 restart;

echo "Setting up Drush and Drupal"
./install/drupal7-core-setup 
read -p "Press [Enter] key if you have noted yourtr password..."
#set privileges
chown -Rh ubuntu:www-data /home/ubuntu/.drush;
chown -Rh ubuntu:www-data /home/ubuntu/.drush/cache
chown -Rh ubuntu:www-data /home/ubuntu/.drush/cache/default
chown -Rh ubuntu:www-data /home/ubuntu/.drush/cache/usage

./install/cleanup
chown -Rh "$username" /opt/.drubuntu
echo ""
echo "To change the MySql Root PWD 'MyRoot' enter"&& 
echo ""
echo "mysql_secure_installation"&& 
echo ""&&
echo "and follow the advice of the script! Your preseted password for MySql is MyRoot'"
./features --plymouth > /dev/null
reboot -p

and here is the last script where mkdir is present

#!/bin/bash
DLURL=https://drubuntu.googlecode.com/git
#settiing up drush
drush -y dl drush --destination=/usr/share;
#Download and set up drupal

mkdir /var/www/d7

cd /var/www/d7
drush -y dl drupal;
cd drup*;
cp -r .htaccess .gitignore /var/www/d7;
cp -r * /var/www/d7
cd /var/www/d7
rm -r drup*;
mkdir /var/www/d7/sites/default/files; 
chmod 777 /var/www/d7/sites/default/files;  
cp -r "/var/www/d7/sites/default/default.settings.php" "/var/www/d7/sites/default/settings.php";
chmod 777 /var/www/d7/sites/default/settings.php;
wget -O /var/www/d7/setupsite $DLURL/scripts/setupsite.sh >/dev/null 2>&1;
chmod +x /var/www/d7/setupsite; 
chown -Rh "$username":www-data /var/www;
chmod 644 /var/www/d7/.htaccess;
chmod 644 "/var/www/d7/sites/default/settings.php";
chmod 644 "/var/www/d7/sites/default/default.settings.php"
sudo bash setupsite
cd /var/www/d7

 The result of the mkdir line I've marked creates a file in var/www that is called d7 so the rest of the script fails.

There are more scripts of course I hope this will be enough information to exermain if this is really a bug. 




2013/8/23 Bob Proulx <bob@proulx.com>
Horvan, Please use reply-all to keep the bug log in the recipient list
rather than reply to me privately.  That way all of the team can
participate.  The bug log is that 15168 address in the recipient list.
Thanks.  I forward this to the bug log.

horvan dillus wrote:
> This is just one bug related to mkdir The short version of this
> could be I ran mkdir in a sub sub shell and it creates a file
> instead a directory as i mentioned in the subject.  this has nothing
> to do with wget. Sorry for the missunderstanding

Please show us exactly what you did to cause mkdir to create a file
instead of a directory.  The use of a sub sub shell will not matter to
mkdir.

Until we see how you did this we will think it is not a bug in mkdir
but is instead a bug in your script.  But if you show us then all
doubt is removed.  Please show us.

Bob