virsh-connect:tldr:b56e9

This command is used to connect to a remote host (running QEMU/KVM) using the virsh command-line tool.

• virsh is a command-line interface used to manage virtual machines (VMs) and virtualization hosts.
• connect is the virsh command used to connect to a specified virtualization hypervisor or host.
• qemu+ssh is the transport method specified for the connection. It indicates that SSH protocol will be used to establish the connection with the remote host.
• ${user_name@host_name} represents the username and hostname (or IP address) of the remote host. You need to replace ${user_name} with the actual username, and ${host_name} with the hostname or IP address of the remote host you want to connect to.
• /system is the domain used to specify that the connection is made to the system-level (default) domain, which provides access to the management of the virtualization host and its configuration.

In summary, the command virsh connect qemu+ssh://${user_name@host_name}/system connects to a remote host using SSH and allows you to manage virtual machines and the virtualization host using the virsh command-line tool.