diff --git a/ch2-inventory/student-quanpt/01-ipOnly.yaml b/ch2-inventory/student-quanpt/01-ipOnly.yaml
new file mode 100644
index 0000000..be39e19
--- /dev/null
+++ b/ch2-inventory/student-quanpt/01-ipOnly.yaml
@@ -0,0 +1,6 @@
+all:
+ hosts: 
+        192.168.100.11:
+        192.168.100.12:
+        192.168.100.21:
+        192.168.100.22:
diff --git a/ch2-inventory/student-quanpt/02-nonFQDN.yaml b/ch2-inventory/student-quanpt/02-nonFQDN.yaml
new file mode 100644
index 0000000..46d5ee3
--- /dev/null
+++ b/ch2-inventory/student-quanpt/02-nonFQDN.yaml
@@ -0,0 +1,12 @@
+all:
+ hosts:
+         ubuntu11:
+                 ansible_host: 192.168.100.11
+         ubuntu12:
+                 ansible_host: 192.168.100.12
+         centos21:
+                 ansible_host: 192.168.100.21
+         centos22:
+                 ansible_host: 192.168.100.22
+         ubuntu-2:
+                 ansible_host: 192.168.94.242
diff --git a/ch2-inventory/student-quanpt/03-hostgroups-children-copy.yaml b/ch2-inventory/student-quanpt/03-hostgroups-children-copy.yaml
new file mode 100644
index 0000000..fd83e66
--- /dev/null
+++ b/ch2-inventory/student-quanpt/03-hostgroups-children-copy.yaml
@@ -0,0 +1,18 @@
+all:
+ hosts:
+  fakehost.local:
+ children:
+  linux:
+   children:
+    ubuntu:
+     hosts:
+      ubuntu11:
+       ansible_host: 192.168.100.11
+      ubuntu12:
+       ansible_host: 192.168.100.12
+    centos:
+     hosts:
+      centos21:
+       ansible_host: 192.168.100.21
+      centos22:
+       ansible_host: 192.168.100.22
diff --git a/ch3-playbook/07-install-apache-not-work.yaml b/ch3-playbook/07-install-apache-not-work.yaml
index 8a09eb2..67257af 100644
--- a/ch3-playbook/07-install-apache-not-work.yaml
+++ b/ch3-playbook/07-install-apache-not-work.yaml
@@ -6,12 +6,12 @@
 
   tasks:
     - name: Install Apache package
-      yum:
-        name: httpd
+      apt:
+        name: apache2
         state: latest
 
     - name: Restart and enable the service
-      service:
-        name: httpd
+      systemd:
+        name: apache2
         state: restarted
-        enabled: yes
\ No newline at end of file
+        enabled: yes
diff --git a/ch3-playbook/08-quanpt-apache-helloworld.yaml b/ch3-playbook/08-quanpt-apache-helloworld.yaml
new file mode 100644
index 0000000..65825a9
--- /dev/null
+++ b/ch3-playbook/08-quanpt-apache-helloworld.yaml
@@ -0,0 +1,25 @@
+# Playbook for automated apache installation
+---
+- name: The demo playbook
+  hosts: all
+  gather_facts: yes
+  become: yes
+  vars:
+    my_name: 'QuanPT'
+
+  tasks:
+    - name: Install Apache package
+      apt:
+        name: apache2
+        state: latest
+
+    - name: template index.html
+      template:
+        src: ./files/index.html
+        dest: /var/www/html/
+        mode: 0755
+    - name: Restart and enable the service
+      systemd:
+        name: apache2
+        state: restarted
+        enabled: yes
diff --git a/ch3-playbook/files/index.html b/ch3-playbook/files/index.html
new file mode 100644
index 0000000..427385a
--- /dev/null
+++ b/ch3-playbook/files/index.html
@@ -0,0 +1 @@
+{{my_name}}
diff --git a/ch3-playbook/inventory/hosts b/ch3-playbook/inventory/hosts
index e02db0e..8ee972c 100644
--- a/ch3-playbook/inventory/hosts
+++ b/ch3-playbook/inventory/hosts
@@ -1,13 +1,13 @@
 [ubuntu]
-ubuntu11 ansible_host=192.168.100.11
-ubuntu12 ansible_host=192.168.100.12
+ubuntu-2 ansible_host=192.168.94.242
+ubuntu-3 ansible_host=192.168.94.243
 
-[centos]
-centos21 ansible_host=192.168.100.21
-centos22 ansible_host=192.168.100.22
+#[centos]
+#centos21 ansible_host=192.168.100.21
+#centos22 ansible_host=192.168.100.22
 
 
-[linux:children]
-ubuntu
-centos
+#[linux:children]
+#ubuntu
+#centos