4

Overview
At this post we will reveal below ansible modules and get them on practice with examples

command copy file

user group service

script

Ansible module - user

[root@shell-master ~]# ansible-doc -s user
- name: Manage user accounts

Example: Create new user
Run below command to create user wayne02

[root@shell-master ~]# ansible webservers -m user -a "name=wayne02 home=/home/wayne02 shell=/bin/bash"

After the command finished, switch to shell-node1, checking if the user created:

Ansible module - group

[root@shell-master ~]# ansible-doc -s group
- name: Add or remove groups

Example: Add new group
Run below command to create new group testing-group

[root@shell-master ~]# ansible webservers -m group -a "name=testing-group state=present"

Switch back to shell-node1, verify if the group been created

Ansible module - service
```
[root@shell-master ~]# ansible-doc -s service
- name: Manage services
```
By follow the help documentation, you can use below command format to perform service management, like restart, stop etc.
```
ansible webservers -m service -a "name=servicename ......"
```
Ansible module - script
```
[root@shell-master ~]# ansible-doc -s script
- name: Runs a local script on a remote node after transferring it
```
Example: Build a local script, then transfer it to remote server and execute it
On shell-master, build a script file named testing.sh with below content (The scripts will create 1 readme.txt under /tmp/, and also create 10 data files under /tmp/):
```
#!/bin/bash

cd /tmp/

# create readme.txt under /tmp/
cat > readme.txt << _EOF_
This is a testing script
We'll create 10 data files under /tmp/
_EOF_

touch data{0..9}.data
```
After create the shell script file, you need to change it's access mode, let it can be executed by using below command:
```
[root@shell-master ~]# chmod 755 testing.sh
[root@shell-master ~]# ls -lh testing.sh
-rwxr-xr-x. 1 root root 169 Aug  8 08:53 testing.sh
```
Alright, let's using Ansible to post this script to be execution on remote server. Running below command to invoke ansible script module:
```
[root@shell-master ~]# ansible webservers -m script -a "testing.sh"
```
Then switch back to shell-node1, let's verify if the readme.txt and data files been created or not:
All good with Ansible common modules now, next let's research on Ansible playbook.

command	copy	file
user	group	service
script