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How to setup Let's Encrypt for Nginx on Ubuntu 18.04 (including IPv6, HTTP/2 and A+ SLL rating)

---

Virtual hosts

Let's say you want to host domains first.com and second.com.

Create folders for their files:

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How to create an HTTPS certificate for localhost domains

This focuses on generating the certificates for loading local virtual hosts hosted on your computer, for development only.

Do not use self-signed certificates in production ! For online certificates, use Let's Encrypt instead (tutorial).

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package main

import (
	"net/http"
	"database/sql"
	"fmt"
	"log"
	"os"
)

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Generate keypairs

gpg --full-generate-key

# use any email, i used [email protected], passphrase=123456

$ gpg --output public.pgp --armor --export [email protected]
$ gpg --output private.pgp --armor --export-secret-key  [email protected]

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package main

import (
	"encoding/base64"
	"flag"
	"fmt"
	"io/ioutil"
	"os"

	"go.dedis.ch/kyber/v4/encrypt/ecies"

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package main

import (
	"encoding/base64"
	"flag"
	"fmt"
	"io/ioutil"
	"os"

	"go.dedis.ch/kyber/v3/pairing/bn256"

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package main

import (
	"encoding/base64"
	"fmt"

	"go.dedis.ch/kyber/v3/pairing/bn256"
	"go.dedis.ch/kyber/v3/share"
	"go.dedis.ch/kyber/v3/sign/bls"
	"go.dedis.ch/kyber/v3/sign/tbls"

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package main

import (
  "net/http"
  "os"
  "bytes"
  "path"
  "path/filepath"
  "mime/multipart"
  "io"

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package main

import (
	"database/sql"
	"encoding/json"
	"fmt"
	"log"
	"time"

	"github.com/go-sql-driver/mysql"

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package main

import (
	"io"
	"mime/multipart"
	"net/http"
	"net/url"
	"os"
	"fmt"
)