我正在尝试使用 qemu/kvm 测试自定义内核配置
当我$ virsh --connect qemu:///system net-start default这样做时，这就是我得到的输出。
error: Failed to start network default
error: Unable to create bridge virbr0: Package not installed
我无法在网上找到此特定问题的资源，如果有人可以帮助我解决此问题，那将非常有帮助。
我正在使用 Debian 10 (Buster) 和5.8.4-rc4-next-20200710.提前谢谢你:)
更新：
apt search libvirt
给出以下输出
$ apt search libvirt
Sorting... Done
Full Text Search... Done
archipel-agent-hypervisor-network/stable 0.6.0-1 all
Virtual Machine Orchestration (Agent Hypervisor Network)
bit-babbler/stable 0.8 amd64
BitBabbler hardware TRNG and kernel entropy source support
gir1.2-libvirt-glib-1.0/stable,now 1.0.0-1 amd64 [installed,automatic]
GObject introspection files for the libvirt-glib library
gir1.2-libvirt-sandbox-1.0/stable,now 0.5.1+git20160404-1 amd64 [installed,automatic]
GObject introspection files for the libvirt-sandbox library
libnss-libvirt/stable 5.0.0-4+deb10u1 amd64
nss plugin providing IP address resolution for virtual machines
libsanlock-client1/stable,now 3.6.0-3 amd64 [installed,automatic]
Shared storage lock manager (client library)
libsys-virt-perl/stable,now 5.0.0-1 amd64 [installed,automatic]
Perl module providing an extension for the libvirt library
libvirt-clients/stable,now 5.0.0-4+deb10u1 amd64 [installed]
Programs for the libvirt library
libvirt-daemon/stable,now 5.0.0-4+deb10u1 amd64 [installed]
Virtualization daemon
libvirt-daemon-driver-storage-gluster/stable,now 5.0.0-4+deb10u1 amd64 [installed]
Virtualization daemon glusterfs storage driver
libvirt-daemon-driver-storage-rbd/stable,now 5.0.0-4+deb10u1 amd64 [installed]
Virtualization daemon RBD storage driver
libvirt-daemon-driver-storage-zfs/stable,now 5.0.0-4+deb10u1 amd64 [installed]
Virtualization daemon ZFS storage driver
libvirt-daemon-system/stable,now 5.0.0-4+deb10u1 amd64 [installed]
Libvirt daemon configuration files
libvirt-dbus/stable,now 1.3.0-1 amd64 [installed]
libvirt D-Bus API bindings
libvirt-dev/stable,now 5.0.0-4+deb10u1 amd64 [installed]
development files for the libvirt library
libvirt-doc/stable,now 5.0.0-4+deb10u1 all [installed]
documentation for the libvirt library
libvirt-glib-1.0-0/stable,now 1.0.0-1 amd64 [installed]
libvirt GLib and GObject mapping library
libvirt-glib-1.0-dev/stable,now 1.0.0-1 amd64 [installed]
Development files for the libvirt-glib library
libvirt-ocaml/stable,now 0.6.1.4-2+b1 amd64 [installed]
OCaml bindings for libvirt (runtime)
libvirt-ocaml-dev/stable,now 0.6.1.4-2+b1 amd64 [installed]
OCaml bindings for libvirt (development files)
libvirt-sandbox-1.0-5/stable,now 0.5.1+git20160404-1 amd64 [installed]
Application sandbox toolkit shared library
libvirt-sandbox-1.0-dev/stable,now 0.5.1+git20160404-1 amd64 [installed]
Development files for libvirt-sandbox library
libvirt-sanlock/stable,now 5.0.0-4+deb10u1 amd64 [installed]
Sanlock plugin for virtlockd
libvirt-wireshark/stable,now 5.0.0-4+deb10u1 amd64 [installed]
Wireshark dissector for the libvirt protocol
libvirt0/stable,now 5.0.0-4+deb10u1 amd64 [installed,automatic]
library for interfacing with different virtualization systems
libvirtodbc0/stable 6.1.6+dfsg2-4+b2 amd64
high-performance database - ODBC libraries
libvirtualpg-dev/stable 2.0.0~rc0-1 amd64
VirtualPG development files
libvirtualpg0/stable 2.0.0~rc0-1 amd64
VirtualPG shared library
libvirtuoso5.5-cil/stable 6.1.6+dfsg2-4+b2 amd64
high-performance database - Mono assemblies
mom/stable 0.5.12-1 all
Dynamically manage system resources on virtualization hosts
munin-libvirt-plugins/stable 0.0.6-1 all
Munin plugins using libvirt
nagios-plugins-contrib/stable 24.20190301 amd64
Plugins for nagios compatible monitoring systems
nbdkit-plugin-libvirt/stable 1.10.3-1 amd64
libvirt plugin for nbdkit
php-libvirt-php/stable 0.5.4-3 amd64
libvirt bindings for PHP
python-libvirt/stable 5.0.0-1 amd64
libvirt Python bindings
python3-libvirt/stable,now 5.0.0-1 amd64 [installed,automatic]
libvirt Python 3 bindings
resource-agents/stable 1:4.2.0-2+deb10u1 amd64
Cluster Resource Agents
ruby-fog-libvirt/stable 0.6.0-1 all
Module for the 'fog' gem to support libvirt
ruby-libvirt/stable 0.7.1-1 amd64
Ruby bindings for libvirt
vagrant-libvirt/stable 0.0.45-2 all
Vagrant plugin that adds an Libvirt provider to Vagrant
vagrant-mutate/stable 1.2.0-4 all
convert vagrant boxes to work with different providers
vagrant-sshfs/stable 1.3.1-1 all
vagrant plugin that adds synced folder support with sshfs
virt-goodies/stable 0.4-2.1 all
A collection of helpful virtualisation related tools
virt-sandbox/stable 0.5.1+git20160404-1 amd64
Application sandbox toolkit
virt-top/stable 1.0.8-2 amd64
show stats of virtualized domains
virtinst/stable,now 1:2.0.0-3 all [installed]
Programs to create and clone virtual machines