經常使用語法

MySQL

安全

-- 建立新用戶和密碼
CREATE USER 'newuser'@'localhost' IDENTIFIED BY 'newpass';
-- 修改已有用戶的密碼
SET PASSWORD FOR 'existinguser'@'localhost' = PASSWORD('existingpass');

Nginx

安裝

CentOS

vim /etc/yum.repos.d/nginx.repo

[nginx]
name=nginx repo
baseurl=http://nginx.org/packages/centos/7/$basearch/
gpgcheck=0
enabled=1

Ubuntu

wget https://nginx.org/keys/nginx_signing.key

sudo apt-key add nginx_signing.key

vim /etc/apt/sources.list

deb http://nginx.org/packages/ubuntu/ codename nginx
deb-src http://nginx.org/packages/ubuntu/ codename nginx

Version    Codename    Supported Platforms
12.04    precise    x86_64, i386
14.04    trusty    x86_64, i386, aarch64/arm64
16.04    xenial    x86_64, i386, ppc64el, aarch64/arm64
16.10    yakkety    x86_64, i386

負載均衡

http {
    upstream myapp1 {
        server srv1.example.com;
        server srv2.example.com;
        server srv3.example.com;
    }

    server {
        listen 80;

        location / {
            proxy_pass http://myapp1;
        }
    }
}

反向代理

location / {
    proxy_pass       http://localhost:8000;
    proxy_set_header Host      $host;
    proxy_set_header X-Real-IP $remote_addr;
}