Update: README.md in part00

Add some dependencies and set uppercase variable in script.sh

part00-getting-ready/README.md

@@ -4,12 +4,28 @@ Systems Ansible
 
 Simple ansible configuration of base systems accorss different environments.
 
-✅ In this example we are going to create a user for DevOps engineers. this dedicated user will have root access to our server. 
+✅ In this example we are going to create a user for DevOps engineers. this dedicated user will have `root` access to our server. 
 
 ⚠️ files you need to change before using the code:
-- inventory
+
+- `inventory`
+
 ### initial step
-Try this command to add your users key to the server so you can connect to it using your workstation.
+
+Try this command to add your users key to the server so you can connect to it using your workstation. </br>
+For Running below command if `sshpass` package is not installed, you need to install it in your controller node by:
+
+In Feora/Redhat/CentOS
+```
+yum update -y && yum install -y sshpass
+```
+In Debian/Ubuntu
+```
+apt update -y && apt install -y sshpass
+```
+
+Then You can invoke below command:
+
 ```
 ansible all -k -K -m authorized_key -a "user='your_username' state='present' key='{{lookup('file', '~/.ssh/id_rsa.pub')}}'"
 ```
@@ -18,6 +34,7 @@ Examples
 --------
 
 To run a particular configuration:
+
 ```
 ansible-playbook  ansible-learning.yml
 ```

part00-getting-ready/ansible-learning.yml

@@ -7,21 +7,21 @@
     - name: Create account
       user:
         name: devops
+        # set bash as default shell for user.
+        shell: /bin/bash
 
     - name: sudo access
       copy:
         dest: /etc/sudoers.d/devops
+        # Granting sudo to created passwordless user 
+        # visudo 
         content: 'devops ALL=(ALL) NOPASSWD: ALL'
         validate: /usr/sbin/visudo -cf %s
 
-    - name: set up bash as default shell for user.
-      user:
-        name: devops
-        shell: /bin/bash
-
     - name: ssh key
       authorized_key:
         user: devops
         state: present
         manage_dir: yes
-        key: "{{ lookup( 'file', '~/.ssh/id_rsa.pub') }}"
+        # Adding ssh_key of a user whi is running playbook.
+        key: "{{ lookup( 'file', lookup( 'env', 'HOME' ) + '/.ssh/id_rsa.pub') }}"

part00-getting-ready/install-python/README.md

@@ -1,2 +1,8 @@
+Very First Step
+========
+
 Install Python using ansible module `raw` since any other ansible module, such as `apt`, needs python installed:
-	`ansible-playbook -i hosts.yml -u root python.yml`
+
+```
+ansible-playbook -i hosts.yml -u root python.yml
+```

part00-getting-ready/install-python/script.sh

@@ -1,15 +1,17 @@
 #!/bin/bash
-declare -A osInfo;
-osInfo[/etc/debian_version]="apt"
-osInfo[/etc/alpine-release]="apk"
-osInfo[/etc/centos-release]="yum"
-osInfo[/etc/fedora-release]="dnf"
 
-for f in ${!osInfo[@]}
+declare -A OS_INFO;
+OS_INFO[/etc/debian_version]="apt"
+OS_INFO[/etc/alpine-release]="apk"
+OS_INFO[/etc/centos-release]="yum"
+OS_INFO[/etc/fedora-release]="dnf"
+
+for RELEASE_FILE in ${!OS_INFO[@]}
 do
-    if [[ -f $f ]];then
-        package_manager=${osInfo[$f]}
+    if [[ -f $RELEASE_FILE ]];then
+        PKG_MANAGER=${OS_INFO[$RELEASE_FILE]}
     fi
 done
 
-$package_manager install python3
+$PKG_MANAGER update -y
+$PKG_MANAGER install -y python3 python3-pip