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Ansible Tutorial: Intorduction to simple Ansible commands
======
In our earlier Ansible tutorial, we discussed [**the installation & configuration of Ansible**][1]. Now in this ansible tutorial, we will learn some basic examples of ansible commands that we will use to manage our infrastructure. So let us start by looking at the syntax of a complete ansible command,
```
$ ansible <group> -m <module> -a <arguments>
```
Here, we can also use a single host or all in place of <group> & <arguments> are optional to provide. Now let's look at some basic commands to use with ansible,
### Check connectivity of hosts
We have used this command in our previous tutorial also. The command to check connectivity of hosts is
```
$ ansible <group> -m ping
```
### Rebooting hosts
```
$ ansible <group> -a "/sbin/reboot"
```
### Checking host 's system information
Ansible collects the system's information for all the hosts connected to it. To display the information of hosts, run
```
$ ansible <group> -m setup | less
```
Secondly, to check a particular info from the collected information by passing an argument,
```
$ ansible <group> -m setup -a "filter=ansible_distribution"
```
### Transfering files
For transferring files we use a module 'copy' & complete command that is used is
```
$ ansible <group> -m copy -a "src=/home/dan dest=/tmp/home"
```
### Manging users
So to manage the users on the connected hosts, we use a module named 'user' & comamnds to use it are as follows,
#### Creating a new user
```
$ ansible <group> -m user -a "name=testuser password=<encrypted password>"
```
#### Deleting a user
```
$ ansible <group> -m user -a "name=testuser state=absent"
```
**Note:-** To create an encrypted password, use the 'mkpasswd -method=sha-512' command.
### Changing permissions & ownership
So for changing ownership of files of connected hosts, we use module named 'file' & commands used are
### Changing permission of a file
```
$ ansible <group> -m file -a "dest=/home/dan/file1.txt mode=777"
```
### Changing ownership of a file
```
$ ansible <group> -m file -a "dest=/home/dan/file1.txt mode=777 owner=dan group=dan"
```
### Managing Packages
So, we can manage the packages installed on all the hosts connected to ansible by using 'yum' & 'apt' modules & the complete commands used are
#### Check if package is installed & update it
```
$ ansible <group> -m yum -a "name=ntp state=latest"
```
#### Check if package is installed & don't update it
```
$ ansible <group> -m yum -a "name=ntp state=present"
```
#### Check if package is at a specific version
```
$ ansible <group> -m yum -a "name= ntp-1.8 state=present"
```
#### Check if package is not installed
```
$ ansible <group> -m yum -a "name=ntp state=absent"
```
### Managing services
So to manage services with ansible, we use a modules 'service' & complete commands that are used are,
#### Starting a service
```
$ansible <group> -m service -a "name=httpd state=started"
```
#### Stopping a service
```
$ ansible <group> -m service -a "name=httpd state=stopped"
```
#### Restarting a service
```
$ ansible <group> -m service -a "name=httpd state=restarted"
```
So this completes our tutorial of some simple, one line commands that can be used with ansible. Also, for our future tutorials, we will learn to create plays & playbooks that help us manage our hosts more easliy & efficiently.
If you think we have helped you or just want to support us, please consider these :-
Connect to us: [Facebook][2] | [Twitter][3] | [Google Plus][4]
Become a Supporter - [Make a contribution via PayPal][5]
Linux TechLab is thankful for your continued support.
--------------------------------------------------------------------------------
via: http://linuxtechlab.com/ansible-tutorial-simple-commands/
作者：[SHUSAIN][a]
译者：[译者ID](https://github.com/译者ID)
校对：[校对者ID](https://github.com/校对者ID)
本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
[a]:http://linuxtechlab.com/author/shsuain/
[1]:http://linuxtechlab.com/create-first-ansible-server-automation-setup/
[2]:https://www.facebook.com/linuxtechlab/
[3]:https://twitter.com/LinuxTechLab
[4]:https://plus.google.com/+linuxtechlab
[5]:http://linuxtechlab.com/contact-us-2/

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Ansible 教程：简单 Ansible 命令介绍
======
在我们之前的 Ansible 教程中，我们讨论了[ **Ansible** 的安装和配置][1]。在这个 ansible 教程中，我们将学习一些基本的 ansible 命令的例子，我们将用它来管理基础设施。所以让我们先看看一个完整的 ansible 命令的语法：
```
$ ansible <group> -m <module> -a <arguments>
```
在这里，我们可以用单个主机或用 <group> 代替全部主机，<arguments> 代表可以提供的选项。现在我们来看看一些 ansible 的基本命令。
### 检查主机的连通性
我们在之前的教程中也使用了这个命令。检查主机连接的命令是：
```
$ ansible <group> -m ping
```
### 重启主机
```
$ ansible <group> -a "/sbin/reboot"
```
### 检查主机的系统信息
Ansible 收集所有连接到它主机的信息。要显示主机的信息，请运行：
```
$ ansible <group> -m setup | less
```
其次，通过传递参数来从收集的信息中检查特定的信息：
```
$ ansible <group> -m setup -a "filter=ansible_distribution"
```
### 传输文件
对于传输文件，我们使用模块 “copy” ，完整的命令是这样的：
```
$ ansible <group> -m copy -a "src=/home/dan dest=/tmp/home"
```
### 管理用户
要管理已连接主机上的用户，我们使用一个名为 “user” 的模块，并如下使用它。
#### 创建新用户
```
$ ansible <group> -m user -a "name=testuser password=<encrypted password>"
```
#### 删除用户
```
$ ansible <group> -m user -a "name=testuser state=absent"
```
**注意：** 要创建加密密码，请使用 ”mkpasswd -method=sha-512“。
### 更改权限和所有者
要改变已连接主机文件的所有者，我们使用名为 ”file“ 的模块，使用如下。
### 更改文件权限
```
$ ansible <group> -m file -a "dest=/home/dan/file1.txt mode=777"
```
### 更改文件的所有者
```
$ ansible <group> -m file -a "dest=/home/dan/file1.txt mode=777 owner=dan group=dan"
```
### 管理软件包
我们可以通过使用 ”yum“ 和 ”apt“ 模块来管理所有已连接主机的软件包，完整的命令如下：
#### 检查包是否已安装并更新
```
$ ansible <group> -m yum -a "name=ntp state=latest"
```
#### 检查包是否已安装，但不更新
```
$ ansible <group> -m yum -a "name=ntp state=present"
```
#### 检查包是否是特定的版本
```
$ ansible <group> -m yum -a "name= ntp-1.8 state=present"
```
#### 检查包是否没有安装
```
$ ansible <group> -m yum -a "name=ntp state=absent"
```
### 管理服务
要管理服务，我们使用模块 “service” ，完整命令如下：
#### 启动服务
```
$ansible <group> -m service -a "name=httpd state=started"
```
#### 停止服务
```
$ ansible <group> -m service -a "name=httpd state=stopped"
```
#### 重启服务
```
$ ansible <group> -m service -a "name=httpd state=restarted"
```
这样我们简单的，只有一行的 ansible 命令的教程就完成了。此外，在未来的教程中，我们将学习创建 playbook，来帮助我们更轻松高效地管理主机。
If you think we have helped you or just want to support us, please consider these :-
如果你认为我们帮助到您，或者只是想支持我们，请考虑这些：
关注我们：[Facebook][2] | [Twitter][3] | [Google Plus][4]
成为支持者 - [通过 PayPal 捐助][5]
Linux TechLab 感谢你的持续支持。
--------------------------------------------------------------------------------
via: http://linuxtechlab.com/ansible-tutorial-simple-commands/
作者：[SHUSAIN][a]
译者：[geekpi](https://github.com/geekpi)
校对：[校对者ID](https://github.com/校对者ID)
本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
[a]:http://linuxtechlab.com/author/shsuain/
[1]:http://linuxtechlab.com/create-first-ansible-server-automation-setup/
[2]:https://www.facebook.com/linuxtechlab/
[3]:https://twitter.com/LinuxTechLab
[4]:https://plus.google.com/+linuxtechlab
[5]:http://linuxtechlab.com/contact-us-2/