#!/bin/sh

######################################################################################
# faster-dapper.sh - Tweak default settings to speed up Ubuntu 6.06 Dapper Drake     #
#                                                                                    #
# Usage: sudo ./faster-dapper.sh as a user with full sudo access                     #
#                                                                                    #
# Version 0.9 Created Jan 26, 2007 by Jeff Schroeder (jeffschroeder@computer.org)    #
# License: GNU GPL 2 ONLY. See http://www.fsf.org/licensing/licenses/info/GPLv2.html #
#                                                                                    #
# NOTE: If you don't understand this script, don't use it. I expect you to edit it   #
#                                                                                    #
######################################################################################

INSTALLED_DRIVE="/dev/hda"

# Are we running on Dapper?
if ( ! grep "Ubuntu 6.06" /etc/issue >/dev/null 2>&1); then
    echo "This script is only intended for Ubuntu 6.06 Dapper Drake"
    exit 1
fi

logger " -===== Installation log started on $(date) for faster-dapper.sh =====- " #Logs installation information to /var/log/messages
echo " -===== Installation started on $(date) for faster-dapper.sh =====- "

# Update the system
apt-get update && apt-get --yes upgrade 

# Enable the Completely Fair Queuing Linux process scheduler to handle high CPU usage situations better
if (! grep "elevator=cfq" /boot/grub/menu.lst > /dev/null 2>&1); then
    logger "      Kernel process scheduler changed to CFQ"
    sed -ie '/# defoptions/s/splash/splash elevator=cfq/' /boot/grub/menu.lst
    update-grub
else
    echo "Kernel process scheduler is already CFQ"
fi

# Preload is an adaptive readahead daemon. Read /usr/share/doc/preload/proposal.txt.gz after installing preload for more info
if [ ! -f /etc/preload.conf ]; then
    logger "      Installed preload"
    apt-get --yes install preload
else
    echo "Preload already installed"
fi

# Enable prelink which causes big applications like firefox and OO.o to load faster
if (! grep "^PRELINKING=yes" /etc/default/prelink > /dev/null 2>&1); then
    logger "      Installed prelink"
    apt-get --yes install prelink && sed -ie 's/unknown/yes/' /etc/default/prelink

    # Uncomment this if you don't keep your computer on all night and want to have prelink run on newly installed software
    # NOTE: This makes apt-get upgrade or apt-get dist-upgrade take a loooooong time.
    #echo 'DPkg::Post-Invoke {"echo Running prelink, please wait...;/etc/cron.daily/prelink";}' >> /etc/apt/apt.conf

    echo -n "Running prelink for the first time so this might take awhile..."
    /etc/cron.daily/prelink && echo "done"
else
    echo "Prelinking already enabled"
fi

# Disable ipv6 to improve network responsiveness and speed dhcp lease negotiation at boot time
if [ -d /etc/modprobe.d ]; then
    if ( ! grep "net-pf-10 off" /etc/modprobe.d/aliases > /dev/null 2>&1 ); then
        logger "      Disabled ipv6"
        echo "alias net-pf-10 off" >> /etc/modprobe.d/aliases
    fi
    if ( ! grep "ipv6 off" /etc/modprobe.d/aliases > /dev/null 2>&1 ); then
        logger "      Disabled ipv6 alias"
        echo "alias ipv6 off" >> /etc/modprobe.d/aliases
    fi    
fi

# Speed up gnome a bit
logger "      Improved gnome speed"
gconftool-2 --set --type boolean /desktop/gnome/interface/enable_animations false
gconftool-2 --set --type boolean /apps/panel/global/enable_animations false
gconftool-2 --set --type string /apps/nautilus/preferences/preview_sound never
#gconftool-2 --set --type string /apps/nautilus/preferences/show_image_thumbnails never
#gconftool-2 --set --type string /apps/nautilus/preferences/show_icon_text never

# Performance tweak to speed up your hard drive
logger "      Enabled IDE hard disk tweaks"
/sbin/hdparm -u1 -m16 -c1 -A1 -a64 -d1 -K1 $INSTALLED_DRIVE > /dev/null

# Performance tweak to speed up ext3 partitions with lots of files
for volume in $(mount 2> /dev/null| grep ext3 | awk '{print $1}'); do
    logger "     Enabled dir_index ext3 option for $volume"
    tune2fs -O dir_index "$volume"
done

# Enable dash as /bin/sh to run shell scripts instead of bloated bash
# See https://launchpad.net/distros/ubuntu/+spec/dash-as-bin-sh
if ( ! dpkg -l dash >/dev/null 2>&1 ); then
    apt-get install dash && update-alternatives --install /bin/sh sh /bin/dash 1
else
    update-alternatives --install /bin/sh sh /bin/dash 1
fi

# Disable unnecessary services. 
# Remove any of these if you use them: hplip: hp printers, bluez-utils: bluetooth, pppd-dns: dialup users.
for service in hplip ppp festival bluez-utils mdadm apmd brltty lvm evms pppd-dns waitnfs.sh; do
    logger "     Disabled service $service"
    /etc/init.d/$service stop
    update-rc.d -f $service remove
done

# Disable more unnecessary services if the computer is not a laptop
# Comment out this section if you are using a laptop
for service in laptop-mode pcmcia pcmciautils; do
    logger "     Disabled service $service"
    /etc/init.d/$service remove
    update-rc.d -f $service remove
done

logger " -===== Installation log finished on $(date) for faster-dapper.sh =====- "
echo " -===== Installation finished on $(date) for faster-dapper.sh =====- "

echo " "
echo "Your installation of Ubuntu 6.06 Dapper Drake should run faster now..."
echo "Please reboot your computer for some changes to take affect."