t1hilo has be running centos6 for a few weeks now, here are my notes on upgrading t1/t2 to centos6 using a restore from t1hilo. on centos 4, the disk are /dev/hdb on centos 6, the disk are /dev/sda Partition setup for disk: /dev/sda1 20G / for centos4 (or /r1) /dev/sda2 20G / for centos6. (or /r2) /dev/sda3 20G /aux catalog, home /dev/sda4 rest /aux1 (unmounted). Created backup for t1hilo on all partitions in /irtf.backup/t1hilo/120626* list of mac addresses for the tcs computers: t1hilo 50:E5:49:53:F6:FE t1 50:E5:49:35:48:29 t2 50:E5:49:53:F6:E4 Restore the /sda1 (root) and make centos6 the default boot image. 1. Boot from CentOS 6 DVD. (.686 32-bit linux). boot 'Rescure installed system' select rescue method 'Local CD/DVD'. enable IP/4 support. ( /24 fr ipv4 prefix) start a shell. mount irtf_backup # mount -o nolock basking:/irtf.backup /irtf.backup Format /dev/sda2 (centos6 boot partition): # mkfs.ext4 -v -m 3 /dev/sda2 // only centos6 boot disk is ext4. # mkfs.ext3 -v -m 3 /dev/sda3 // this is /aux 2. Restore mount your drives # mkdir /r2 # mkdir /aux # mount /dev/sda2 /r2 # mount /dev/sda3 /aux restore centos6 root partition: # cd /r2 # restore rvf /irtf.backup//t1hilo/120626.root.zdump restore /aux boot partition: # cd /aux # restore rvf /irtf.backup//t1hilo/120626.aux.zdump 3. setup grub # /r2/sbin/grub > root (hd0,1) note: sda2 is hd0,1 > find /boot/grub/stage1 > setup (hd0) This command install GRUB on MBR > quit 4. check: /etc/hosts /etc/sysconfig/network /etc/sysconfig/network-scripts/ifcfg-eth0 /etc/fstab /etc/X11/xorg.conf reboot to centos6 change root passwork (the one based on the host name). check IP setting (ifconfig -a ). Run System->Preference->network_connection 5. For t1, install new tcs3. Stuff I didn't do, but put here for refrence. ---------------------------------------------------------------------------------- If you have problems with the network, some suggest not using the Network Manager: chkconfig NetworkManager off services NetworkManager stop yum remove /*NetworkManager\* x. For t1, install new tcs3. ref: nvidia configuring TwinView: ftp://download.nvidia.com/XFree86/Linux-x86/100.14.23/README/chapter-13.html