This tutorial will explain how to upgrade Ubuntu Server from Feisty to Hardy

Step 1: Feisty to Gusty Upgrade

first be sure your feisty up-to-date

sudo apt-get update

sudo apt-get upgrade

sudo apt-get dist-upgrade


if everything ok, ready for upgrade to gusty.

nano /etc/apt/source.list

all change "feisty" to "gutsy"

save and exit (ctrl-x, yes)

sudo apt-get update
sudo apt-get dist-upgrade


(one package doesn't upgrade : mailscanner
but this step its fix:
nano /etc/init.d/mailscanner

around 124 line (do_stop function) add 'exit 0'

do_stop()
{ exit 0
# Return
# 0 if daemon has been stopped
# 1 if daemon was already stopped
# 2 if daemon could not be stopped
# other if a failure occurred
start-stop-daemon --stop --retry=TERM/30 --name $NAME
RETVAL="$?"
[ "$RETVAL" = 2 ] && return 2

# Remove lockfile for cronjobs
if [ $RETVAL -eq 0 ]; then
rm -f /var/lock/subsys/mailscanner
touch $stopped_lockfile
fi

}


save and exit.

and re-apply
sudo apt-get dist-upgrade

command. its works. there some warning related with mailscanner but not important (for now)

and reboot

my server is gutsy, now.

step 2. Gutsy to Hardy upgrade

nano /etc/apt/source.list

all change "gutsy" to "hardy"

save and exit (ctrl-x, yes)

sudo apt-get update
sudo apt-get dist-upgrade

one package doesn't upgrade : mailscanner
but no problem

reboot

mailscanner fix:

first backup your mailscanner folder. (/etc/mailscanner)

sudo cp -R /etc/mailscanner /etc/mailscanner_backup


sudo apt-get remove --purge mailscanner

(if removing results same error, around 124 line (do_stop function) add 'exit 0')

wget http://http.us.debian.org/debian/pool/main/m/mailscanner/mailscanner_4.68.8-1_all.deb
sudo dpkg -i mailscanner_4.68.8-1_all.deb

and

nano /etc/default/mailscanner

# Uncomment this line once MailScanner has been fully configured.
#
run_mailscanner=1

save and exit..

replace your backup mailscanner folder (/etc/mailscanner)

sudo cp -R /etc/mailscanner_backup /etc/mailscanner

/etc/init.d/mailscanner start