[Let's keep the replies on the mailing list please] On Wed, Jul 13, 2016 at 11:04:13AM +0800, Baochuan Wu wrote: > Thanks Richard. > I tried guestfs_set_network, and I think I can successfully use yum -y to > install software. It is a little slow. Most of the time is taken running yum and downloading packages ... > My program operates CentOS 6.4 VM virtual disks on CentOS 7, I installed > libguestfs into the CentOS 6.4. After installing, I reboot CentOS 6.4 but I > cannot log into it anymore. You will need to relabel the filesystem after installing packages, see: https://github.com/libguestfs/libguestfs/blob/master/customize/customize_... Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-builder quickly builds VMs from scratch http://libguestfs.org/virt-builder.1.html