diff --git a/user/tasks/examples/fifo-ex.c b/user/tasks/examples/fifo-ex.c
index aa824481..7718bc66 100644
--- a/user/tasks/examples/fifo-ex.c
+++ b/user/tasks/examples/fifo-ex.c
@@ -10,7 +10,7 @@
 
 #include "uart.h"
 
-#define TEST_STR "fifo: hello world\n\r"
+#define TEST_STR "[fifo example] hello world\n\r"
 #define LEN strlen(TEST_STR)
 
 void fifo_task1(void)
diff --git a/user/tasks/examples/mqueue-ex.c b/user/tasks/examples/mqueue-ex.c
index 59104303..e718e39a 100644
--- a/user/tasks/examples/mqueue-ex.c
+++ b/user/tasks/examples/mqueue-ex.c
@@ -16,7 +16,7 @@ void message_queue_task1(void)
 {
     setprogname("mqueue-ex-1");
 
-    char *str = "mqueue: greeting";
+    char *str = "greeting!";
 
     struct mq_attr attr = {
         .mq_maxmsg = 100,
@@ -56,7 +56,8 @@ void message_queue_task2(void)
         mq_receive(mqdes_print, str, MSG_SIZE_MAX, &msg_prio);
 
         /* Print received message */
-        printf("received message \"%s\", priority = %d\n\r", str, msg_prio);
+        printf("[mqueue example] received \"%s\" with priority %d\n\r", str,
+               msg_prio);
     }
 }
 
diff --git a/user/tasks/examples/mutex-ex.c b/user/tasks/examples/mutex-ex.c
index c3615da3..8182026a 100644
--- a/user/tasks/examples/mutex-ex.c
+++ b/user/tasks/examples/mutex-ex.c
@@ -36,13 +36,13 @@ void mutex_task1(void)
         pthread_mutex_lock(&mutex);
 
         if (my_cnt == BUFFER_SIZE) {
-            printf("[task 1] buffer is full. producer is waiting...\n\r");
+            printf("[mutex task 1] buffer is full, wait for consumer\n\r");
             pthread_cond_wait(&cond_producer, &mutex);
         }
 
         /* Produce an item and add it to the buffer */
         my_buffer[my_cnt++] = item;
-        printf("[task 1] produced item %d\n\r", item);
+        printf("[mutex task 1] produced item %d\n\r", item);
         item++;
 
         /* Signal to consumers that an item is available */
@@ -65,13 +65,13 @@ void mutex_task2(void)
         pthread_mutex_lock(&mutex);
 
         if (my_cnt == 0) {
-            printf("[task 2] buffer is empty. consumer is waiting...\n\r");
+            printf("[mutex task 2] buffer is empty, wait for producer\n\r");
             pthread_cond_wait(&cond_consumer, &mutex);
         }
 
         /* Consume an item from the buffer */
         int item = my_buffer[--my_cnt];
-        printf("[task 2] consumed item %d\n\r", item);
+        printf("[mutex task 2] consumed item %d\n\r", item);
 
         /* Signal to producers that there is space in the buffer */
         pthread_cond_signal(&cond_producer);
diff --git a/user/tasks/examples/poll-ex.c b/user/tasks/examples/poll-ex.c
index ac3a1719..e2662a6d 100644
--- a/user/tasks/examples/poll-ex.c
+++ b/user/tasks/examples/poll-ex.c
@@ -53,7 +53,7 @@ void poll_task2(void)
             ssize_t rbytes = read(fifo_fd, buffer, sizeof(buffer) - 1);
             buffer[rbytes] = '\0';
 
-            printf("received %d bytes\n\r", rbytes);
+            printf("[poll example] %d bytes is read from the fifo\n\r", rbytes);
 
             fds[0].revents = 0;
         }
diff --git a/user/tasks/examples/priority-inversion.c b/user/tasks/examples/priority-inversion.c
index f5eca2e7..fcac338a 100644
--- a/user/tasks/examples/priority-inversion.c
+++ b/user/tasks/examples/priority-inversion.c
@@ -26,7 +26,7 @@ void mutex_task_high(void)
 #endif
     pthread_mutex_init(&mutex, &attr);
 
-    printf("[mutex high] attempt to lock the mutex in 5 seconds.\n\r");
+    printf("[mutex task high] attempt to lock the mutex in 5 seconds\n\r");
 
     sleep(5);
 
@@ -35,8 +35,8 @@ void mutex_task_high(void)
         pthread_mutex_lock(&mutex);
 
         printf(
-            "[mutex high] highest-priority thread locked the mutex "
-            "successfully.\n\r");
+            "[mutex task high] mutex is locked by the highest-priority "
+            "thread\n\r");
 
         /* End the critical section */
         pthread_mutex_unlock(&mutex);
@@ -53,12 +53,15 @@ void mutex_task_median(void)
     struct timespec start_time, curr_time;
 
     /* Occupy the CPU to block the lowest-prioiry thread after 3 seconds */
-    printf("[mutex median] block the lowest-priority thread in 3 seconds.\n\r");
+    printf(
+        "[mutex task median] block the lowest-priority thread in 3 "
+        "seconds\n\r");
     sleep(3);
 
     /* Occupy the CPU for 10 seconds */
     printf(
-        "[mutex median] block the lowest-priority thread for 10 seconds.\n\r");
+        "[mutex task median] block the lowest-priority thread for 10 "
+        "seconds\n\r");
 
     clock_gettime(CLOCK_MONOTONIC, &start_time);
 
@@ -84,8 +87,8 @@ void mutex_task_low(void)
         pthread_mutex_lock(&mutex);
 
         printf(
-            "[mutex low] lowest-priority thread locked the mutex "
-            "successfully.\n\r");
+            "[mutex task low] mutex is locked by the lowest-priority "
+            "thread\n\r");
 
         /* Simulate some works */
         sleep(2);
diff --git a/user/tasks/examples/pthread-ex.c b/user/tasks/examples/pthread-ex.c
index 4f686c65..78dc78cb 100644
--- a/user/tasks/examples/pthread-ex.c
+++ b/user/tasks/examples/pthread-ex.c
@@ -11,7 +11,7 @@
 void *my_thread(void *arg)
 {
     for (int i = 0; i < 10; i++) {
-        printf("hello new thread.\n\r");
+        printf("[pthread example] printing from the new thread\n\r");
         sleep(1);
     }
 
@@ -23,8 +23,8 @@ void pthread_task(void)
     setprogname("pthread-ex");
 
     printf(
-        "a new thread will be created and"
-        " canceled after 10 seconds.\n\r");
+        "[pthread example] a new thread will be created and"
+        " canceled after 10 seconds\n\r");
 
     pthread_attr_t attr;
     struct sched_param param;
diff --git a/user/tasks/examples/semaphore.c b/user/tasks/examples/semaphore.c
index 795e6bb9..2c85d9d1 100644
--- a/user/tasks/examples/semaphore.c
+++ b/user/tasks/examples/semaphore.c
@@ -15,7 +15,7 @@ void semaphore_task1(void)
     while (1) {
         sleep(1);
         sem_post(&sem_print);
-        printf("[semaphore 1] posted semaphore.\n\r");
+        printf("[semaphore task 1] semaphore increased\n\r");
     }
 }
 
@@ -25,7 +25,7 @@ void semaphore_task2(void)
 
     while (1) {
         sem_wait(&sem_print);
-        printf("[semaphore 2] received semaphore.\n\r");
+        printf("[semaphore task 2] semaphore decreased\n\r");
     }
 }
 
diff --git a/user/tasks/examples/signal-ex.c b/user/tasks/examples/signal-ex.c
index a0340ae9..d2b925c3 100644
--- a/user/tasks/examples/signal-ex.c
+++ b/user/tasks/examples/signal-ex.c
@@ -12,7 +12,7 @@ static int task1_pid;
 
 void sig_handler(int signum)
 {
-    printf("received signal %d.\n\r", signum);
+    printf("[SIGUSR1 handler] signal number is %d\n\r", signum);
 }
 
 void signal_task1(void)
@@ -36,7 +36,7 @@ void signal_task1(void)
     sigwait(&set, &sig);
 
     /* Print after the signal arrived */
-    printf("signal %d is captured.\n\r", sig);
+    printf("[signal example] signal %d is captured\n\r", sig);
 
     /* Sleep */
     while (1) {
diff --git a/user/tasks/examples/timer-ex.c b/user/tasks/examples/timer-ex.c
index 13a65e3a..7d7158c5 100644
--- a/user/tasks/examples/timer-ex.c
+++ b/user/tasks/examples/timer-ex.c
@@ -11,7 +11,7 @@
 
 void timer_callback(union sigval sv)
 {
-    printf("timer: time's up.\n\r");
+    printf("[timer handler] time's up!\n\r");
 }
 
 void timer_task(void)