sudo apt update
sudo apt install nginx

sudo systemctl start nginx
sudo systemctl stop nginx
sudo systemctl restart nginx

sudo touch /etc/nginx/sites-available/your_project
sudo ln -s /etc/nginx/sites-available/your_project /etc/nginx/sites-enabled/

server {
    listen 80;
    server_name yourdomain.com www.yourdomain.com;

    location / {
        proxy_pass http://localhost:3000;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection 'upgrade';
        proxy_set_header Host $host;
        proxy_cache_bypass $http_upgrade;
    }
}

sudo nginx -t

sudo systemctl reload nginx

sudo apt install certbot python3-certbot-nginx
sudo certbot --nginx -d yourdomain.com -d www.yourdomain.com

sudo certbot renew --dry-run

server {
    listen 80;
    server_name yourdomain.com www.yourdomain.com;
    return 301 https://$host$request_uri;
}

sudo systemctl restart nginx

# Define upstream server for the backend
upstream backend_service {
    server backend1.example.com;
    server backend2.example.com;
}

# Configure server block for API requests
server {
    listen 80;
    server_name api.example.com;

    location /api/ {
        proxy_pass http://backend_service;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection 'upgrade';
        proxy_set_header Host $host;
        proxy_cache_bypass $http_upgrade;
    }
}

upstream app_servers {
    least_conn;
    server backend1.example.com weight=3;
    server backend2.example.com;
}

server {
    listen 443 ssl;

    ssl_certificate /path/to/your/fullchain.pem;
    ssl_certificate_key /path/to/your/privatekey.pem;

    # ... rest of the server block ...
}

http {
    proxy_cache_path /path/to/cache levels=1:2 keys_zone=my_cache:10m max_size=10g inactive=60m use_temp_path=off;

    server {
        # ...
        location / {
            proxy_cache my_cache;
            # ...
        }
    }
}

client_body_buffer_size 128k;
client_max_body_size 100M;
sendfile on;
sendfile_max_chunk 1m;

limit_rate_after 1m;
limit_rate 300k;

keepalive_timeout 15;
send_timeout 60;

header('X-Accel-Redirect: /path/to/large/file.zip');

proxy_cache_path /var/cache/nginx levels=1:2 keys_zone=my_cache:10m max_size=10g inactive=60m use_temp_path=off;

location /download/ {
    proxy_cache my_cache;
    proxy_pass http://backend/;
}

sudo apt update
sudo apt upgrade nginx

server_tokens off;

openssl dhparam -out /etc/nginx/dhparam.pem 4096

ssl_dhparam /etc/nginx/dhparam.pem;
ssl_ciphers 'ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256...';
ssl_prefer_server_ciphers on;

location /admin {
    allow 192.168.1.0/24;
    deny all;
}

# Open the Nginx configuration file for editing
sudo nano /etc/nginx/nginx.conf

# Add 'http2' to the listen directive for your server block
server {
    listen 443 ssl http2;
    listen [::]:443 ssl http2;
    server_name example.com;

    # Remainder of your server block configuration...
}

# Test the Nginx configuration for syntax errors
sudo nginx -t

# Reload Nginx to apply changes
sudo systemctl reload nginx

# Check if the server uses HTTP/2 using cURL
curl -I https://example.com --http2

sendfile on;

tcp_nopush on;
tcp_nodelay on;

open_file_cache max=1000 inactive=20s;
open_file_cache_valid 30s;
open_file_cache_min_uses 2;
open_file_cache_errors on;

location ~* \.(jpg|jpeg|png|gif|ico|css|js)$ {
    expires 30d;
    add_header Cache-Control "public, no-transform";
}

access_log off;

http {
    log_format main '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';
}

location /nginx_status {
    stub_status;
    allow 127.0.0.1; # only allow requests from localhost
    deny all;        # deny all other hosts
}

sudo apt-get install geoip-database libgeoip1

http {
    geoip_country /usr/share/GeoIP/GeoIP.dat;

    map $geoip_country_code $allowed_country {
        default no;
        US yes;
        CA yes;
        UK yes;
    }

    ...other configurations...
}

server {
    ...

    if ($allowed_country = no) {
        return 302 http://example.com/special_offer_for_your_region;
    }

    ...
}

sudo apt update
sudo apt install nginx php-fpm

sudo nano /etc/nginx/sites-available/default

location ~ \.php$ {
    include snippets/fastcgi-php.conf;
    fastcgi_pass unix:/var/run/php/php7.4-fpm.sock; # Ensure this matches your PHP version
    fastcgi_index index.php;
    include fastcgi_params;
}

sudo nano /etc/php/7.4/fpm/pool.d/www.conf

listen = /var/run/php/php7.4-fpm.sock

sudo nginx -t
sudo systemctl restart nginx
sudo systemctl restart php7.4-fpm

echo '<!--?php phpinfo(); ?-->' | sudo tee /var/www/html/info.php

rewrite ^/oldpath$ /newpath last;

rewrite ^/user/(.*)$ /profile?username=$1 last;

return 301 $scheme://$host/newpath;

if ($http_user_agent ~* (googlebot|bingbot)) {
    rewrite ^/old-page$ /new-page-for-bots last;
}

rewrite ^/search$ /find$is_args$args last;

error_page 404 /custom_404.html;
location = /custom_404.html {
    internal;
}

location /oldfolder {
    rewrite ^(/oldfolder/.*)$ /newfolder$1 permanent;
}

rewrite_log on;
access_log /var/log/nginx/rewrite.log combined;

htpasswd -c /etc/nginx/.htpasswd username

location /protected/ {
    auth_basic "Restricted Access";
    auth_basic_user_file /etc/nginx/.htpasswd;
}

sudo systemctl reload nginx

ssl_session_cache shared:SSL:10m;
ssl_session_timeout 10m;
ssl_session_tickets on;

ssl_stapling on;
ssl_stapling_verify on;
resolver 8.8.8.8 8.8.4.4 valid=300s;
resolver_timeout 5s;

ssl_protocols TLSv1.2 TLSv1.3;
ssl_ciphers 'EECDH+AESGCM:EDH+AESGCM';
ssl_prefer_server_ciphers on;

add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;

openssl dhparam -out /etc/nginx/dhparam.pem 2048
ssl_dhparam /etc/nginx/dhparam.pem;

sudo apt-get update
sudo apt-get install nginx
sudo apt-get install libnginx-mod-*

ngx_addon_name=ngx_http_my_module
HTTP_MODULES="$HTTP_MODULES ngx_http_my_module"
NGX_ADDON_SRCS="$NGX_ADDON_SRCS $ngx_addon_dir/ngx_http_my_module.c"

static char *
ngx_http_my_module(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) {
    // Your code here to handle the directive
    return NGX_CONF_OK;
}

static ngx_command_t ngx_http_my_module_commands[] = {
    { ngx_string("my_directive"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF|NGX_CONF_TAKE1,
      ngx_http_my_module,
      NGX_HTTP_LOC_CONF_OFFSET,
      offsetof(ngx_http_my_module_conf_t, my_directive_value),
      NULL },
    ngx_null_command
};

./configure --add-module=/path/to/your/module
make
sudo make install

sudo service nginx restart

sudo apt-get update
sudo apt-get install build-essential libpcre3 libpcre3-dev libssl-dev zlib1g-dev
wget http://nginx.org/download/nginx-1.xx.x.tar.gz
wget https://github.com/arut/nginx-rtmp-module/archive/master.zip
unzip master.zip
tar -zxvf nginx-1.xx.x.tar.gz
 cd nginx-1.xx.x
./configure --with-http_ssl_module --add-module=../nginx-rtmp-module-master
make
sudo make install

sudo nano /usr/local/nginx/conf/nginx.conf

rtmp {
    server {
        listen 1935;
        chunk_size 4096;

        application live {
            live on;
            record off;
        }
    }
}

# Set up caching parameters
location ~* \.(jpg|jpeg|png|gif|ico|css|js)$ {
    expires 30d;
    add_header Cache-Control "public, no-transform";
}

# Set the number of worker processes
worker_processes auto;

# Max number of open files
worker_rlimit_nofile 100000;

# Number of connections per worker
worker_connections 4000;

# Keepalive settingskeepalive_timeout 30;

# Define a cache path
proxy_cache_path /data/nginx/cache levels=1:2 keys_zone=my_cache:10m max_size=10g inactive=60m use_temp_path=off;

# Enable Gzip
gzip on;
gzip_disable "msie6";
gzip_vary on;
gzip_proxied any;
gzip_comp_level 6;
gzip_buffers 16 8k;
gzip_http_version 1.1;
gzip_types text/plain text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript;

# Static file handling optimizations
sendfile on;
tcp_nopush on;
tcp_nodelay on;

# Redirect from old page to new page
rewrite ^/oldpage.html$ /newpage.html permanent;

# Redirect www to non-www
server {
    server_name www.example.com;
    return 301 $scheme://example.com$request_uri;
}

# Redirect HTTP to HTTPS
server {
    listen 80;
    server_name example.com www.example.com;
    return 301 https://example.com$request_uri;
}

# Remove .html extension
rewrite ^/(.*)\.html$ /$1 permanent;

location / {
    allow 192.168.1.0/24;
    deny all;
}

location /secure/ {
    auth_basic "Restricted";
    auth_basic_user_file /etc/nginx/.htpasswd;
}

if ($request_method !~ ^(GET|HEAD)$ ) {
    return 405;
}

geo $ban_country {
    default no;
    # Countries to ban
    US yes;
}

server {
    if ($ban_country = yes) {
        return 403;
    }
}

server {
    listen 80;
    return 301 https://$host$request_uri;
}

server {
    listen 443 ssl;
    # SSL configuration ...
}

limit_req_zone $binary_remote_addr zone=mylimit:10m rate=10r/m;

server {
    location /login/ {
        limit_req zone=mylimit;
        # login page specifics
    }
}

# Configure NGINX to listen on an alternative port (e.g., 8080)
server {
    listen 8080;
    server_name your_domain.com;

    location / {
        # Configuration for your application
    }
}

# Configure Varnish backend pointing to NGINX
backend default {
    .host = "127.0.0.1";
    .port = "8080";
}

sub vcl_recv {
    if (req.url ~ "^/admin" || req.http.Cookie ~ "sessionid") {
        return(pass);
    }
}

location / {
    add_header X-Cache-Status $upstream_cache_status;

    if ($request_method = POST) {
        set $skip_cache 1;
    }

    proxy_cache_bypass $skip_cache;
}

# Define a shared memory zone for storing state
limit_req_zone $binary_remote_addr zone=mylimit:10m rate=1r/s;

# Apply to a location
location / {
    limit_req zone=mylimit burst=5;
}

# Define a shared memory zone
limit_conn_zone $binary_remote_addr zone=addr:10m;

# Apply to a location
location / {
    limit_conn addr 10;
}

location ~* \.(jpg|jpeg|png|gif|ico|css|js)$ {
    expires 30d;
    add_header Cache-Control "public, no-transform";
}

location / {
    proxy_cache my_cache;
    proxy_pass http://my_upstream;
    proxy_cache_valid 200 302 10m;
    proxy_cache_valid 404 1m;
}

location / {
    proxy_pass http://upstream_server;
}

proxy_read_timeout 300s;
proxy_connect_timeout 300s;

location / {
    try_files $uri $uri/ =404;
}

location / {
    root /var/www/html;
    index index.html index.htm;
}

server {
    listen 443 ssl;
    ssl_certificate /etc/nginx/ssl/example.com.crt;
    ssl_certificate_key /etc/nginx/ssl/example.com.key;
}

# Define a rate limiting zone in http context
limit_req_zone $binary_remote_addr zone=mylimit:10m rate=10r/s;

# Apply the rate limiting in server or location context
location /api/ {
    limit_req zone=mylimit burst=20;
}

# Without delay
limit_req zone=mylimit burst=20 nodelay;

# Differentiating users by API key
map $http_api_key $limit_key {
    default $binary_remote_addr;
    # API keys with higher limits
    'key1' 1.2.3.4;
    'key2' 5.6.7.8;
}

# Apply differentiated limits
limit_req_zone $limit_key zone=mylimit:10m rate=5r/s;

server {
    listen 80;
    server_name example.com www.example.com;

    root /var/www/example.com/html;
    index index.html index.htm index.nginx-debian.html;

    location / {
        try_files $uri $uri/ =404;
    }
}

git init --bare ~/example.git

nano ~/example.git/hooks/post-receive

#!/bin/sh
GIT_WORK_TREE=/var/www/example.com git checkout -f

chmod +x ~/example.git/hooks/post-receive

server {
    listen 80;
    server_name example.com;

    location / {
        root /var/www/example.com;
        index index.html index.htm;
        try_files $uri $uri/ =404;
    }

    # Other configurations...
}

split_clients "$remote_addr$request_uri" $variant {
    50%      .v1;
    50%      .v2;
}

server {
    listen 80;
    server_name example.com;

    location / {
        if ($variant = .v1) {
            proxy_pass http://version1.example.com;
        }

        if (\$variant = .v2) {
            proxy_pass http://version2.example.com;
        }
    }
}

split_clients "$remote_addr$request_uri" $variant {
    95%      .stable;
    5%       .canary;
}

server {
    listen 80;
    server_name example.com;

    location / {
        if ($variant = .stable) {
            proxy_pass http://stable-version.example.com;
        }

        if ($variant = .canary) {
            proxy_pass http://canary-version.example.com;
        }
    }
}

events {
    worker_connections 1024;
}

http {
    keepalive_timeout 65;
}

location ~* \.(jpg|jpeg|png|gif|ico|css|js)$ {
    expires 30d;
    add_header Cache-Control "public, no-transform";
}

proxy_cache_path /path/to/cache levels=1:2 keys_zone=my_cache:10m max_size=1g inactive=60m use_temp_path=off;

http {
    gzip on;
    gzip_types text/plain application/xml application/json application/javascript text/css;
    gzip_proxied any;
    gzip_min_length 1000;
}

http {
    client_body_timeout 12;
    client_header_timeout 12;
    send_timeout 10;
}

http {
    tcp_nopush on;
    tcp_nodelay on;
}

location ~* \.(jpg|jpeg|png|gif|ico)$ {
    access_log off;
    log_not_found off;
}

sudo nano /etc/nginx/sites-available/default

server {
    listen [::]:80;
    listen 80;
    server_name example.com;
    ...
}

sudo nginx -t

sudo systemctl restart nginx

sudo netstat -tulpan | grep nginx

server {
    listen 443 ssl;
    server_name example.com;

    ssl_certificate /etc/nginx/ssl/example.com.crt;
    ssl_certificate_key /etc/nginx/ssl/example.com.key;

    # More SSL configurations...
}

client_max_body_size 10M;

mkdir /var/www/uploads
chmod 700 /var/www/uploads
chown nginx:nginx /var/www/uploads

// PHP example for handling file uploads
if (in_array($_FILES['uploaded_file']['type'], ['image/jpeg', 'image/png', 'application/pdf'])) {
    $new_filename = sha1_file($_FILES['uploaded_file']['tmp_name']) . '.' . pathinfo($_FILES['uploaded_file']['name'], PATHINFO_EXTENSION);
    move_uploaded_file($_FILES['uploaded_file']['tmp_name'], '/var/www/uploads/' . $new_filename);
} else {
    // Handle invalid file type
}

location /upload {
    client_max_body_size 10M;
    proxy_pass http://backend;
    proxy_set_header Host $host;
    proxy_buffering on;
}

access_log /var/log/nginx/upload_access.log main;
error_log /var/log/nginx/upload_error.log warn;

# Example configuration snippet for Nginx
location /cache/ {
    set $memcached_key $uri;
    memcached_pass localhost:11211;
    error_page 404 = @fallback;
}

location @fallback {
    proxy_pass http://backend;
}

<?php
// PHP code snippet to interact with Memcached
$memcache = new Memcache;
$memcache->connect('localhost', 11211) or die("Could not connect");

$key = md5('user_profile_' . $user_id); // Unique key for caching
$data = $memcache->get($key);

if ($data) {
    echo 'Data from cache: ' . $data;
} else {
    // Generate data here
    $data = get_user_profile_from_database($user_id);
    $memcache->set($key, $data, MEMCACHE_COMPRESSED, 1200);
    echo 'Data from database: ' . $data;
}
?>

server {
    listen 80;
    server_name example.com;

    location /websocket {
        proxy_pass http://websocket_backend;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_set_header Host $host;
    }
}

location /long-polling {
    proxy_pass http://long_polling_backend;
    proxy_read_timeout 60s;
}

server {
    listen 80;
    server_name example.com;

    # ... other configurations ...
}

http {
    map $http_user_agent $is_mobile {
        default 0;
        ~*'(android|webos|iphone|ipad|ipod|blackberry|iemobile|opera mini)' 1;
    }

    # ... other http configurations ...
}

server {
    if ($is_mobile) {
        rewrite ^ http://m.example.com$request_uri? permanent;
    }

    # ... other server configurations ...
}

nginx -t

service nginx restart

# Specify domains that are allowed to access resources
add_header 'Access-Control-Allow-Origin' 'http://example.com';

# Specify which methods can be used during the actual request
add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';

# Specify allowed headers
add_header 'Access-Control-Allow-Headers' 'Content-Type';

# Additional settings can be configured based on requirements
# For example: Credentials support
add_header 'Access-Control-Allow-Credentials' 'true';

# Handle OPTIONS method requests for preflight checks
if ($request_method = 'OPTIONS') {
    add_header 'Access-Control-Allow-Origin' '*';
    add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
    # You may need to include other headers used in actual requests
    add_header 'Access-Control-Allow-Headers' 'Content-Type, Authorization';
    add_header 'Access-Control-Max-Age' 1728000;
    add_header 'Content-Type' 'text/plain charset=UTF-8';
    add_header 'Content-Length' 0;
    return 204;
}

# Step 1: Open your Nginx configuration file
sudo nano /etc/nginx/nginx.conf

# Step 2: Inside the server block, specify the location you want to proxy pass
location /ws {
    proxy_pass http://websocket_backend;
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection "upgrade";
    proxy_set_header Host $host;
}

# Increase buffer size for busy WebSocket servers
proxy_buffers 8 32k;
proxy_buffer_size 64k;

# Set timeout for no activity on the connection
proxy_read_timeout 600s;
proxy_send_timeout 600s;

# Check error logs for troubleshooting
sudo tail -f /var/log/nginx/error.log

sudo apt update && sudo apt upgrade -y

sudo apt install nginx php-fpm

sudo nano /etc/nginx/sites-available/your_domain.conf

location ~ \.php$ {
    include snippets/fastcgi-php.conf;
    fastcgi_pass unix:/run/php/php<your_php_version>-fpm.sock;
    fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
    include fastcgi_params;
}

sudo nginx -t

sudo systemctl restart nginx

sudo nano /etc/php/<your_php_version>/fpm/pool.d/www.conf

sudo systemctl restart php<your_php_version>-fpm

php -v
nginx -v

http {
    ...
    proxy_cache_path /var/cache/nginx levels=1:2 keys_zone=my_cache:10m max_size=1g inactive=60m;
    proxy_cache_key "$scheme$request_method$host$request_uri";
    ...
    server {
        ...
        location / {
            proxy_cache my_cache;
            proxy_cache_valid 200 302 60m;
            proxy_cache_valid 404 1m;
            proxy_pass http://backend;
        }
        ...
    }
}