diff --git a/components/wpa_supplicant/src/eap_peer/eap_mschapv2.c b/components/wpa_supplicant/src/eap_peer/eap_mschapv2.c
index 2e87c0e65d..20a1212cad 100644
--- a/components/wpa_supplicant/src/eap_peer/eap_mschapv2.c
+++ b/components/wpa_supplicant/src/eap_peer/eap_mschapv2.c
@@ -600,7 +600,7 @@ eap_mschapv2_process(struct eap_sm *sm, void *priv,
 	case MSCHAPV2_OP_FAILURE:
 		return eap_mschapv2_failure(sm, data, ret, ms, len, id);
 	default:
-		wpa_printf(MSG_ERROR, "EAP-MSCHAPV2: Unknow op code %d -ignored\n",
+		wpa_printf(MSG_ERROR, "EAP-MSCHAPV2: Unknown op code %d - ignored\n",
 			  ms->op_code);
 		return NULL;
 	}
diff --git a/examples/protocols/pppos_client/main/pppos_client_main.c b/examples/protocols/pppos_client/main/pppos_client_main.c
index 700bc77b34..5a477a5aa1 100644
--- a/examples/protocols/pppos_client/main/pppos_client_main.c
+++ b/examples/protocols/pppos_client/main/pppos_client_main.c
@@ -120,7 +120,7 @@ static void modem_event_handler(void *event_handler_arg, esp_event_base_t event_
         xEventGroupSetBits(event_group, STOP_BIT);
         break;
     case ESP_MODEM_EVENT_UNKNOWN:
-        ESP_LOGW(TAG, "Unknow line received: %s", (char *)event_data);
+        ESP_LOGW(TAG, "Unknown line received: %s", (char *)event_data);
         break;
     default:
         break;
diff --git a/examples/system/console/components/cmd_system/cmd_system.c b/examples/system/console/components/cmd_system/cmd_system.c
index 5d5e9fd225..6e82c3df9a 100644
--- a/examples/system/console/components/cmd_system/cmd_system.c
+++ b/examples/system/console/components/cmd_system/cmd_system.c
@@ -70,7 +70,7 @@ static int get_version(int argc, char **argv)
     esp_chip_info(&info);
     printf("IDF Version:%s\r\n", esp_get_idf_version());
     printf("Chip info:\r\n");
-    printf("\tmodel:%s\r\n", info.model == CHIP_ESP32 ? "ESP32" : "Unknow");
+    printf("\tmodel:%s\r\n", info.model == CHIP_ESP32 ? "ESP32" : "Unknown");
     printf("\tcores:%d\r\n", info.cores);
     printf("\tfeature:%s%s%s%s%d%s\r\n",
            info.features & CHIP_FEATURE_WIFI_BGN ? "/802.11bgn" : "",