# 教室环境

### 教室网络环境

<figure><img src="https://908246044-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F0EziAJhIr1WW7oVxFuVu%2Fuploads%2FqcbrAWWnuOcEv8uZmXhS%2Fimage.png?alt=media&#x26;token=2615f972-b3dc-4408-a6f1-f3e52c82ff66" alt=""><figcaption></figcaption></figure>

* 本课程中，你主要操作的计算机系统是 workstation
* 另外的2台分别是 servera 和 serverb
* 所有的主机都位于 lab.example.com 这个 dns 域中
* 所有系统都有一个标准的帐号：student，密码也是student
* 所有学生系统上的 root 密码都是 redhat

<table><thead><tr><th width="272">主机名</th><th width="148">IP</th><th>角色</th></tr></thead><tbody><tr><td>bastion.lab.example.com</td><td>172.25.250.254</td><td>将学生私有网络连接到 classroom 服务器的网关系统</td></tr><tr><td>workstation.lab.example.com</td><td>172.25.250.9</td><td>系统管理员使用的图形工作站</td></tr><tr><td>servera.lab.example.com</td><td>172.25.250.10</td><td>调优目标服务器</td></tr><tr><td>serverb.lab.example.com</td><td>172.25.250.11</td><td>调优目标服务器</td></tr><tr><td><p>content.example.com</p><p>materials.example.com</p><p>classroom.example.com</p></td><td></td><td>classroom 工具服务器</td></tr></tbody></table>

### 常用命令

```bash
# 查看classroom的状态, 它必须是RUNNING
[kiosk@foundation0 ~]$ rht-vmctl status classroom
classroom RUNNING

# 启动classroom虚拟机
[kiosk@foundation0 ~]$ rht-vmctl start classroom

# 查看所有其他虚机的状态
[kiosk@foundation0 ~]$ rht-vmctl status all

# 启动所有的虛拟机
[kiosk@foundation0 ~]$ rht-vmctl start all

# 查看“物理控制台”以登录并使用服务器
[kiosk@foundation0 ~]$ rht-vmctl view servera

# 重置servera
[kiosk@foundation0 ~]$ rht-vmctl reset servera

# 完全重置servera
[kiosk@foundation0 ~]$ rht-vmctl fullreset servera

```


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