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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

A weakness has been discovered in the random number generator used by OpenSSL on Debian and Ubuntu systems. As a result of this weakness, certain encryption keys are much more common than they should be, such that an attacker could guess the key through a brute-force attack given minimal knowledge of the system.

This particularly affects the use of encryption keys in OpenSSH. This vulnerability only affects operating systems which (like Ubuntu) are based on Debian. However, other systems can be indirectly affected if weak keys are imported into them.

We consider this an extremely serious vulnerability, and urge all users to act immediately to secure their systems. The following Ubuntu releases are affected: Ubuntu 7.04 Ubuntu 7.10 Ubuntu 8.04 LTS

This advisory also applies to the corresponding versions of Kubuntu, Edubuntu, and Xubuntu.

Please see usn-612-2 for the latest information regarding updating your system and taking appropriate protective measures. More information will be released within 48 hours.

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Setting up an email server is a difficult process involving a number of different programs, each of which needs to be properly configured. The best approach is to install and configure each individual component one by one, ensuring that each one works, an

Zimbra & Ubuntu Server 7.10 How-To Servers & Security