diff --git a/src/osysmon_file.c b/src/osysmon_file.c
index 1dec3db..8e52497 100644
--- a/src/osysmon_file.c
+++ b/src/osysmon_file.c
@@ -153,6 +153,9 @@
 	struct value_node *vn_file;
 	struct osysmon_file *of;
 
+	if (llist_empty(&g_oss->files))
+		return 0;
+
 	vn_file = value_node_add(parent, "file", NULL);
 
 	llist_for_each_entry(of, &g_oss->files, list)
diff --git a/src/osysmon_ping.c b/src/osysmon_ping.c
index f736798..3484374 100644
--- a/src/osysmon_ping.c
+++ b/src/osysmon_ping.c
@@ -229,6 +229,10 @@
 	struct value_node *vn_host;
 	int num_host = iterator_count(g_oss->pings->ping_handle);
 	pingobj_iter_t *iter;
+
+	if (!num_host)
+		return 0;
+
 	struct value_node *vn_ping = value_node_add(parent, "ping", NULL);
 	if (!vn_ping)
 		return -ENOMEM;
@@ -257,8 +261,5 @@
 		add_ttl(iter, vn_host);
 	}
 
-	if (num_host)
-		return ping_send(g_oss->pings->ping_handle);
-
-	return 0;
+	return ping_send(g_oss->pings->ping_handle);
 }
diff --git a/src/osysmon_rtnl.c b/src/osysmon_rtnl.c
index 9fd4251..f1e5a0e 100644
--- a/src/osysmon_rtnl.c
+++ b/src/osysmon_rtnl.c
@@ -401,6 +401,9 @@
 {
 	struct value_node *vn_net;
 
+	if (llist_empty(&g_oss->netdevs))
+		return 0;
+
 	if (!g_oss->rcs)
 		g_oss->rcs = rtnl_init(NULL);
 
diff --git a/src/osysmon_shellcmd.c b/src/osysmon_shellcmd.c
index 347b982..83dc0c9 100644
--- a/src/osysmon_shellcmd.c
+++ b/src/osysmon_shellcmd.c
@@ -165,6 +165,9 @@
 	struct value_node *vn_file;
 	struct osysmon_shellcmd *oc;
 
+	if (llist_empty(&g_oss->shellcmds))
+		return 0;
+
 	vn_file = value_node_add(parent, "shellcmd", NULL);
 
 	llist_for_each_entry(oc, &g_oss->shellcmds, list)
diff --git a/src/osysmon_sysinfo.c b/src/osysmon_sysinfo.c
index 85d9ee9..9cb434c 100644
--- a/src/osysmon_sysinfo.c
+++ b/src/osysmon_sysinfo.c
@@ -30,16 +30,6 @@
 #include "osysmon.h"
 #include "value_node.h"
 
-/***********************************************************************
- * Runtime Code
- ***********************************************************************/
-
-/* called once on startup before config file parsing */
-int osysmon_sysinfo_init()
-{
-	return 0;
-}
-
 static float loadfac(unsigned long in) {
 	return in/65536.0;
 }
@@ -55,6 +45,48 @@
 #define to_minutes(in)	(((in)/(SECS_PER_MIN))%MINS_PER_HOUR)
 #define to_seconds(in)	((in)%SECS_PER_MIN)
 
+static bool sysinfo_enabled = true;
+
+/***********************************************************************
+ * VTY
+ ***********************************************************************/
+
+#define CMD_STR "Display sysinfo\n"
+DEFUN(cfg_sysinfo, cfg_sysinfo_cmd,
+	"sysinfo",
+	CMD_STR)
+{
+	sysinfo_enabled = true;
+
+	return CMD_SUCCESS;
+}
+
+DEFUN(cfg_no_sysinfo, cfg_no_sysinfo_cmd,
+	"no sysinfo",
+	NO_STR CMD_STR)
+{
+	sysinfo_enabled = false;
+
+	return CMD_SUCCESS;
+}
+
+static void osysmon_sysinfo_vty_init(void)
+{
+	install_element(CONFIG_NODE, &cfg_sysinfo_cmd);
+	install_element(CONFIG_NODE, &cfg_no_sysinfo_cmd);
+}
+
+/***********************************************************************
+ * Runtime Code
+ ***********************************************************************/
+
+/* called once on startup before config file parsing */
+int osysmon_sysinfo_init()
+{
+	osysmon_sysinfo_vty_init();
+	return 0;
+}
+
 /* called periodically */
 int osysmon_sysinfo_poll(struct value_node *parent)
 {
@@ -63,6 +95,9 @@
 	char buf[32];
 	int rc;
 
+	if (!sysinfo_enabled)
+		return 0;
+
 	vn_sysinfo = value_node_add(parent, "sysinfo", NULL);
 
 	rc = sysinfo(&si);