ubuntu18.04安装nginx

如何在 ubuntu18.04安装nginx ？

参考官方文档：http://nginx.org/en/linux_packages.html#Ubuntu

稳定版安装示例：

Install the prerequisites（安装必备组件）:

sudo apt install curl gnupg2 ca-certificates lsb-release

To set up the apt repository for stable nginx packages, run the following command（要为稳定的nginx包设置apt存储库，请运行以下命令）:
```
echo "deb http://nginx.org/packages/ubuntu `lsb_release -cs` nginx" \
    | sudo tee /etc/apt/sources.list.d/nginx.list
```
Next, import an official nginx signing key so apt could verify the packages authenticity（接下来，导入一个官方nginx签名密钥，以便apt能够验证包的真实性）:
```
curl -fsSL https://nginx.org/keys/nginx_signing.key | sudo apt-key add -
```
Verify that you now have the proper key（确认您现在有正确的钥匙）:
```
sudo apt-key fingerprint ABF5BD827BD9BF62
```
The output should contain the full fingerprint 573B FD6B 3D8F BC64 1079 A6AB ABF5 BD82 7BD9 BF62 as follows（输出应包含完整指纹573B FD6B 3D8F BC64 1079 A6AB ABF5 BD82 7BD9 BF62，如下所示）:
```
pub   rsa2048 2011-08-19 [SC] [expires: 2024-06-14]
      573B FD6B 3D8F BC64 1079  A6AB ABF5 BD82 7BD9 BF62
uid   [ unknown] nginx signing key <signing-key@nginx.com>
```
To install nginx, run the following commands（要安装nginx，请运行以下命令）:
```
sudo apt update
sudo apt install nginx
```
到这里就已经安装成功了。
启动nginx
```
sudo /etc/init.d/nginx start
```
查看nginx状态
```
sudo /etc/init.d/nginx status
```
更多用法
每当修改了nginx配置文件后，先执行

sudo /etc/init.d/nginx configtest

再执行

sudo /etc/init.d/nginx check-reload
测试

curl -I localhost

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