centos7如何查看ssh服务状态

CentOS 7如何查看SSH服务状态

在CentOS 7操作系统中，SSH（Secure Shell）是一种常用的网络协议，用于通过加密远程登录和执行命令。通过SSH，用户可以远程管理服务器，执行各种任务，并确保数据传输的安全性。但是，有时我们需要检查SSH服务的状态，以确保它正常运行并可以正常连接。

要查看CentOS 7系统上的SSH服务状态，可以按照以下步骤进行操作：

1. 打开终端或控制台。
2. 以root用户身份登录系统。
3. 输入以下命令以检查SSH服务的运行状态：

```
systemctl status sshd
```

如果SSH服务正在运行，该命令将显示SSH服务的当前状态，包括活动状态、PID（进程标识符）和监听端口号。如果SSH服务正在运行，您将看到类似以下内容的输出：

```
● sshd.service - OpenSSH server daemon
Loaded: loaded (/usr/lib/systemd/system/sshd.service; enabled; vendor preset: enabled)
Active: active (running) since Mon 2022-01-01 10:00:00 CST; 1h ago
Docs: man:sshd(8)
man:sshd_config(5)
Main PID: 12345 (sshd)
CGroup: /system.slice/sshd.service
└─12345 /usr/**in/sshd -D
```

如果SSH服务没有运行，您将看到类似以下内容的输出：

```
● sshd.service - OpenSSH server daemon
Loaded: loaded (/usr/lib/systemd/system/sshd.service; enabled; vendor preset: enabled)
Active: inactive (dead)
Docs: man:sshd(8)
man:sshd_config(5)
```

如果SSH服务没有运行，您可以使用以下命令启动SSH服务：

```
systemctl start sshd
```

您还可以使用以下命令停止SSH服务：

```
systemctl stop sshd
```

如果您想设置SSH服务在系统启动时自动启动，可以使用以下命令：

```
systemctl enable sshd
```

如果您想禁用SSH服务的自动启动，可以使用以下命令：

```
systemctl disable sshd
```

通过上述步骤，您可以轻松地查看CentOS 7系统上SSH服务的状态，并进行必要的操作。

CentOS 7 How to Check SSH Service Status

In CentOS 7 operating system, SSH (Secure Shell) is a commonly used network protocol for encrypted remote login and command execution. With SSH, users can remotely manage servers, perform various tasks, and ensure the security of data tran**ission. However, sometimes we may need to check the status of the SSH service to ensure that it is running properly and can be connected to.

To check the SSH service status on CentOS 7 system, you can follow these steps:

1. Open the terminal or console.
2. Log in to the system as the root user.
3. Enter the following command to check the running status of the SSH service:

```
systemctl status sshd
```

If the SSH service is running, this command will display the current status of the SSH service, including the active status, PID (process identifier), and listening port number. If the SSH service is running, you will see output similar to the following:

```
● sshd.service - OpenSSH server daemon
Loaded: loaded (/usr/lib/systemd/system/sshd.service; enabled; vendor preset: enabled)
Active: active (running) since Mon 2022-01-01 10:00:00 CST; 1h ago
Docs: man:sshd(8)
man:sshd_config(5)
Main PID: 12345 (sshd)
CGroup: /system.slice/sshd.service
└─12345 /usr/**in/sshd -D
```

If the SSH service is not running, you will see output similar to the following:

```
● sshd.service - OpenSSH server daemon
Loaded: loaded (/usr/lib/systemd/system/sshd.service; enabled; vendor preset: enabled)
Active: inactive (dead)
Docs: man:sshd(8)
man:sshd_config(5)
```

If the SSH service is not running, you can start it using the following command:

```
systemctl start sshd
```

You can also stop the SSH service using the following command:

```
systemctl stop sshd
```

If you want to enable the SSH service to start automatically at system boot, you can use the following command:

```
systemctl enable sshd
```

If you want to disable the automatic startup of the SSH service, you can use the following command:

```
systemctl disable sshd
```

By following the above steps, you can easily check the status of the SSH service on CentOS 7 system and perform necessary actions.