Fix and improve tests

netenv/environment_linux_test.go

@@ -0,0 +1,11 @@
+package netenv
+
+import "testing"
+
+func TestLinuxEnvironment(t *testing.T) {
+	nameserversTest, err := getNameserversFromResolvconf()
+	if err != nil {
+		t.Errorf("failed to get namerservers from resolvconf: %s", err)
+	}
+	t.Logf("nameservers from resolvconf: %+v", nameserversTest)
+}