1 - ==Create the container== Create a container using centos-4-i386-minimal and set a valid nameserver :

vzctl create $CTID --ostemplate centos-4-i386-minimal --config CONFIG_TEMPLATE --ipadd container_IP --hostname tempvzctl set $CTID --nameserver NAMESERVER_IP --save

2  ==Install centos-5- Enter in containerrelease packages==Use <precode>vzctl enter CTIDexec</precode>to execute the rpm install command on the container:3 - Install centos-5-release packages

vzctl exec $CTID rpm -Uvh http://mirror.centos.org/centos/5.0/os/i386/CentOS/centos-release-notes-5.6-0.0-2.i386.rpmrpm -Uvh \ http://mirror.centos.org/centos/5.0/os/i386/CentOS/centos-release-5-0.06.el5.centos.21.i386.rpm

4 - ==Backup your dev== Backup the container /dev/directory, since as initscripts need needs udev and will remove vzdev you'll net need the backup: 

tar -cf $CTID.dev.tar .-C /vz/private/$CTID dev

5 - ==Install initscripts package== Install initscripts package (forced and with no deps), as per below: 

vzctl exec $CTID rpm -Uvh http://mirror.centos.org/centos/5.0/os/i386/CentOS/initscripts-8.45.14.EL33-1.el5.centos.1.i386.rpm --force --nodeps

6 - Exit from containerNote: If the "transfer failed", go to the [http://mirror.centos.org/centos/5/os/i386/CentOS/ CentOS5 mirror] and find the latest initscripts rpm and use that instead. ==Update conf file== Edit /etc/vz/conf/$CSID.conf and replace

OSTEMPLATE="centos-45-i386-minimal"

 Alternatively, use the 'sed' command toreplace it:

sed -i 's#OSTEMPLATE="centos-4#OSTEMPLATE="centos-5-i386-minimal"#g' /etc/vz/conf/$CTID.conf

8 - Coppy ==Copy existing template== Copy existing template from: 

10 ==Update yum.conf== In /vz/template/centos/5/i386/config/yum.conf change mirrors to CentOS 5 Using sed: <pre>sed - i 's#centos4#centos5#g' /vz/template/centos/5/i386/config/yum.confsed -i 's#CentOS 4#CentOS 5#g' /vz/template/centos/5/i386/config/yum.confsed -i 's#centos/4/#centos/5/#g' /vz/template/centos/5/i386/config/yum.conf</pre> ==Upgrade container packages using == db-version will complain, so delete the conflicting database first:<pre>rm -fr /vz/root/$CTID/var/lib/rpm/__*</pre> Now run vzyum to upgrade the contain packages:<pre>vzyum (32bit only)$CTID upgrade</pre> ===Troubleshooting=== If you get this error: <pre>Error: Missing Dependency: python-abi = 2.3 is needed by package python-elementtree</pre> and/or

11 - Stop your VEYou need to run the following before trying again: 

vzctl stop exec $CTIDrpm -e --justdb python-elementtree --nodepsvzctl exec $CTID rpm --import http://mirrors.kernel.org/centos/RPM-GPG-KEY-CentOS-5

cd vzctl enter $CTID</vz/private/CTIDpre> All went OK? Exit the VE:rm -rf dev<pre>tar -xvf dev.tarexit

13 - Leave the container private dir (or it will not stard)===Troubleshooting=== 

14 - Start If you see errors like this, see the container[[VPS_enter_failed]] article. ==Stop your VE==

vzctl start stop $CTID

15 - Remove container IP==Restore dev== This will replace the new /dev/ with the old one:

vzctl set mv /vz/private/$CTID/dev /vz/private/$CTID/dev.oldtar -xvf $CTID.dev.tar -ipdel container_IPC /vz/private/$CTID

16 - Stop == Remove containerIP ==

vzctl stop set $CTID--ipdel all --save

17 - ==Create the template==

cd /vz/private/$CTIDtar --numeric-owner -zcf /vz/template/cache/centos-5.05-i386-minimal.tar.gz .