Hello

I am a very new user so please bear with me.

I have a Win vista dual booted with ubuntu, no problem there, all's well.

I used live-usb to make a bootable USB with centos 5.0 I created the usb and it will boot just fine. The problem i run into is updating the installation with the package manager. I run the manager and the system prompts for reboot and I get this error:
memory for crash kernel (0x0 to (0x0) not within permissible range.
SDB: assuming drive cache: writethrough
SDB: assuming drive cache: writethrough
/init: line 486: /sysroot/etc/udev/rules.d/ 50-udev*: ambiguous redirect bug in initramfs /init detected
Dropping to a shell. Good luck!

bash: no job control in this shell
bash-3.2#

Can someone help me understand this?

Thanks

usb installs are not best for persistant installation where you want to make changes or system changes like updating OS. Maybe updates were not designed for usb drive, but normal install?

USB is live only for booting purpose this is just like booting from a live-CD so u cannot make changes in an usb

Let's assume you have some persistent file to save data.

Try to do it but when it reboots be sure to power down the system completely. It may be that the system is not fully cold booting.

ah Ok, my understanding of persistent overlay was incorrect, it only apples to the users home directory.
Is it then impossible to have an installation (of CentOS) that is portable and can be modified?
Thanks all for your input

Just install CentOS to the flash drive with the regular CentOS installer (Anaconda). live-usb is not the right tool for this job.

All the documentation you need is here: http://www.centos.org/docs/5/

Also it is worth mentioning that CentOS 5.0 is old and unsupported; please consider the current release (5.5).