root@redacted:~# qm guest cmd 101 get-osinfo
{
   "id" : "freebsd",
   "kernel-release" : "13.1-RELEASE-p7",
   "kernel-version" : "FreeBSD 13.1-RELEASE-p7 n245428-4dfb91682c1 TRUENAS",
   "machine" : "amd64",
   "name" : "FreeBSD",
   "pretty-name" : "FreeBSD 13.1-RELEASE-p7",
   "version" : "13.1-RELEASE-p7",
   "version-id" : "13.1"
}
root@redacted:~# qm guest cmd 101 info
{
   "supported_commands" : [
      {
         "enabled" : true,
         "name" : "guest-get-osinfo",
         "success-response" : true
      },
      {
         "enabled" : true,
         "name" : "guest-get-timezone",
         "success-response" : true
      },
      {
         "enabled" : true,
         "name" : "guest-get-users",
         "success-response" : true
      },
      {
         "enabled" : true,
         "name" : "guest-get-host-name",
         "success-response" : true
      },
      {
         "enabled" : true,
         "name" : "guest-exec",
         "success-response" : true
      },
      {
         "enabled" : true,
         "name" : "guest-exec-status",
         "success-response" : true
      },
      {
         "enabled" : false,
         "name" : "guest-get-memory-block-info",
         "success-response" : true
      },
      {
         "enabled" : false,
         "name" : "guest-set-memory-blocks",
         "success-response" : true
      },
      {
         "enabled" : false,
         "name" : "guest-get-memory-blocks",
         "success-response" : true
      },
      {
         "enabled" : true,
         "name" : "guest-set-user-password",
         "success-response" : true
      },
      {
         "enabled" : true,
         "name" : "guest-get-fsinfo",
         "success-response" : true
      },
      {
         "enabled" : false,
         "name" : "guest-set-vcpus",
         "success-response" : true
      },
      {
         "enabled" : true,
         "name" : "guest-get-vcpus",
         "success-response" : true
      },
      {
         "enabled" : true,
         "name" : "guest-network-get-interfaces",
         "success-response" : true
      },
      {
         "enabled" : false,
         "name" : "guest-suspend-hybrid",
         "success-response" : false
      },
      {
         "enabled" : false,
         "name" : "guest-suspend-ram",
         "success-response" : false
      },
      {
         "enabled" : false,
         "name" : "guest-suspend-disk",
         "success-response" : false
      },
      {
         "enabled" : false,
         "name" : "guest-fstrim",
         "success-response" : true
      },
      {
         "enabled" : false,
         "name" : "guest-fsfreeze-thaw",
         "success-response" : true
      },
      {
         "enabled" : false,
         "name" : "guest-fsfreeze-freeze-list",
         "success-response" : true
      },
      {
         "enabled" : false,
         "name" : "guest-fsfreeze-freeze",
         "success-response" : true
      },
      {
         "enabled" : false,
         "name" : "guest-fsfreeze-status",
         "success-response" : true
      },
      {
         "enabled" : true,
         "name" : "guest-file-flush",
         "success-response" : true
      },
      {
         "enabled" : true,
         "name" : "guest-file-seek",
         "success-response" : true
      },
      {
         "enabled" : true,
         "name" : "guest-file-write",
         "success-response" : true
      },
      {
         "enabled" : true,
         "name" : "guest-file-read",
         "success-response" : true
      },
      {
         "enabled" : true,
         "name" : "guest-file-close",
         "success-response" : true
      },
      {
         "enabled" : true,
         "name" : "guest-file-open",
         "success-response" : true
      },
      {
         "enabled" : true,
         "name" : "guest-shutdown",
         "success-response" : false
      },
      {
         "enabled" : true,
         "name" : "guest-info",
         "success-response" : true
      },
      {
         "enabled" : true,
         "name" : "guest-set-time",
         "success-response" : true
      },
      {
         "enabled" : true,
         "name" : "guest-get-time",
         "success-response" : true
      },
      {
         "enabled" : true,
         "name" : "guest-ping",
         "success-response" : true
      },
      {
         "enabled" : true,
         "name" : "guest-sync",
         "success-response" : true
      },
      {
         "enabled" : true,
         "name" : "guest-sync-delimited",
         "success-response" : true
      }
   ],
   "version" : "5.0.1"
}