Okay, so I'm trying to help classify these packages based on the user's output. Let me look through each one and see what they're for. First, I notice a lot of packages start with "qemu-". QEMU is an open-source machine emulator and virtualizer. The different subpackages like qemu-block-curl, qemu-block-ssh, etc., probably handle various storage backends or network interfaces. For example, curl might be used for HTTP-based block devices, SSH maybe for secure connections, NFS for network file systems. Then there are packages like qemu-system-x86-core and qemu-system-x86, which likely relate to the x86 architecture support in QEMU. The version is 2.10.1-2.fc27.x86_64, so that's pretty specific. Next up are libvirt-related packages. Libvirt is a library for managing virtual machines and other resources. The various subpackages like libvirt-daemon-driver-storage-* probably handle different storage drivers. For instance, the disk driver would manage local disks, mpath for multipath, zfs for ZFS storage, etc. I also see several "driver" packages in libvirt, such as nwfilter (network filtering), nodedev (device management), secret (secret management). These are essential components that extend libvirt's functionality. Looking at the versions, most packages are 3.7.0-4.fc27.x86_64, which suggests they're from Fedora 27, but some QEMU packages have version 2.10.1, same as others. The user provided system information: CentOS Linux release 7.4.1708 (Core) with a Linux kernel 3.10. So the host is running CentOS 7, which makes sense because they're using libvirt and QEMU for virtualization. On the guest side, the OS is Ubuntu 16.04 (since the uname shows 4.4.0-28-generic from June 2016), running on x86_64. So it's a VM created with KVM/QEMU. Putting this together, these packages are part of a virtualization setup using QEMU/KVM managed by libvirt on a CentOS host, and the guest is an Ubuntu VM. The provided package list and system information indicate that you're working within a **KVM/QEMU virtualization environment** on a **CentOS 7.4 host**, with a **Ubuntu 16.04 guest**. ### Key Components Identified: 1. **QEMU Packages**: - **qemu-block-*:** These packages provide block device drivers for various storage backends (e.g., curl, SSH, NFS, iSCSI). - **qemu-system-x86-*:** Core components for running x86 virtual machines. - **qemu-img, qemu-common:** Tools for disk image management and general QEMU utilities. 2. **Libvirt Packages**: - **libvirt-daemon:** Central service for managing virtualization resources. - **libvirt-daemon-driver-*:** Specific drivers for storage (e.g., disk, multipath, NFS), network, interface, and other functionalities. - **libvirt-client:** Tools for interacting with the libvirt daemon. 3. **System Information**: - **Host OS**: CentOS Linux 7.4.1708 (Core). - **Kernel**: 3.10.0-693.17.1.el7.x86_64. - **Guest OS**: Ubuntu 16.04.2 LTS (Linux ovm-cirros 4.4.0-28-generic). ### Conclusion: You're running a **KVM/QEMU-based virtualization setup** on a **CentOS 7 host**, with **libvirt** as the management layer, and you have at least one guest VM (Ubuntu 16.04) configured. If you need further assistance, such as troubleshooting or optimization, feel free to ask!