diff --git a/changes/issue-add-missing-platforms b/changes/issue-add-missing-platforms
new file mode 100644
index 0000000000..b1ee72f1be
--- /dev/null
+++ b/changes/issue-add-missing-platforms
@@ -0,0 +1,2 @@
+* Add missing software inventory and `disk_space_unix` for Debian hosts. Unify definition of linux hosts.
+
diff --git a/server/fleet/hosts.go b/server/fleet/hosts.go
index 7bee5b40dc..26873fb642 100644
--- a/server/fleet/hosts.go
+++ b/server/fleet/hosts.go
@@ -216,6 +216,20 @@ func (h *Host) FleetPlatform() string {
 	return PlatformFromHost(h.Platform)
 }
 
+// HostLinuxOSs are the possible linux values for Host.Platform.
+var HostLinuxOSs = []string{
+	"linux", "ubuntu", "debian", "rhel", "centos", "sles", "kali", "gentoo",
+}
+
+func isLinux(hostPlatform string) bool {
+	for _, linuxPlatform := range HostLinuxOSs {
+		if linuxPlatform == hostPlatform {
+			return true
+		}
+	}
+	return false
+}
+
 // PlatformFromHost converts the given host platform into
 // the generic platforms known by osquery
 // https://osquery.readthedocs.io/en/stable/deployment/configuration/
@@ -223,10 +237,10 @@ func (h *Host) FleetPlatform() string {
 //
 // Returns empty string if hostPlatform is unknnown.
 func PlatformFromHost(hostPlatform string) string {
-	switch hostPlatform {
-	case "ubuntu", "rhel", "debian":
+	switch {
+	case isLinux(hostPlatform):
 		return "linux"
-	case "darwin", "windows":
+	case hostPlatform == "darwin", hostPlatform == "windows":
 		return hostPlatform
 	default:
 		return ""
diff --git a/server/fleet/hosts_test.go b/server/fleet/hosts_test.go
index 1d67519a94..2d92121163 100644
--- a/server/fleet/hosts_test.go
+++ b/server/fleet/hosts_test.go
@@ -6,6 +6,7 @@ import (
 
 	"github.com/WatchBeam/clock"
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 )
 
 func TestHostStatus(t *testing.T) {
@@ -60,3 +61,63 @@ func TestHostIsNew(t *testing.T) {
 	host.CreatedAt = mockClock.Now().AddDate(0, 0, -2)
 	assert.False(t, host.IsNew(mockClock.Now()))
 }
+
+func TestPlatformFromHost(t *testing.T) {
+	for _, tc := range []struct {
+		host        string
+		expPlatform string
+	}{
+		{
+			host:        "unknown",
+			expPlatform: "",
+		},
+		{
+			host:        "",
+			expPlatform: "",
+		},
+		{
+			host:        "linux",
+			expPlatform: "linux",
+		},
+		{
+			host:        "ubuntu",
+			expPlatform: "linux",
+		},
+		{
+			host:        "debian",
+			expPlatform: "linux",
+		},
+		{
+			host:        "rhel",
+			expPlatform: "linux",
+		},
+		{
+			host:        "centos",
+			expPlatform: "linux",
+		},
+		{
+			host:        "sles",
+			expPlatform: "linux",
+		},
+		{
+			host:        "kali",
+			expPlatform: "linux",
+		},
+		{
+			host:        "gentoo",
+			expPlatform: "linux",
+		},
+		{
+			host:        "darwin",
+			expPlatform: "darwin",
+		},
+		{
+			host:        "windows",
+			expPlatform: "windows",
+		},
+	} {
+		fleetPlatform := PlatformFromHost(tc.host)
+		require.Equal(t, tc.expPlatform, fleetPlatform)
+
+	}
+}
diff --git a/server/service/osquery_utils/queries.go b/server/service/osquery_utils/queries.go
index eee2584728..5257df1def 100644
--- a/server/service/osquery_utils/queries.go
+++ b/server/service/osquery_utils/queries.go
@@ -339,7 +339,7 @@ var detailQueries = map[string]DetailQuery{
 SELECT (blocks_available * 100 / blocks) AS percent_disk_space_available,
        round((blocks_available * blocks_size *10e-10),2) AS gigs_disk_space_available
 FROM mounts WHERE path = '/' LIMIT 1;`,
-		Platforms:  []string{"darwin", "linux", "rhel", "ubuntu", "centos"},
+		Platforms:  append(fleet.HostLinuxOSs, "darwin"),
 		IngestFunc: ingestDiskSpace,
 	},
 	"disk_space_windows": {
@@ -450,7 +450,7 @@ SELECT
   'python_packages' AS source
 FROM python_packages;
 `,
-	Platforms:  []string{"linux", "rhel", "ubuntu", "centos"},
+	Platforms:  fleet.HostLinuxOSs,
 	IngestFunc: ingestSoftware,
 }