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namespace AppClient
{
    static class Program
    {
        private static IConfiguration _configuration;

        static async Task Main()
        {
            var builder = new ConfigurationBuilder()
                .AddJsonFile("appsettings.json", optional: true, reloadOnChange: true);

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# RUN THIS COMMAND BEFORE DOCKER UP
# postgresql user : 1001
# nextcloud user: 33
# mkdir -p app/config app/custom_apps app/data app/themes database/postgresql/data mail/domainkeys
# touch app/config/CAN_INSTALL
# chown 33 -R app/
# chown 1001 -R database/


version: '3'

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# path /etc/msmtprc
defaults
auth on
tls  on
tls_trust_file /etc/ssl/certs/ca-bundle.crt
logfile /var/log/msmtp.log

# Gmail configuration
account gmail
host    smtp.gmail.com

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#!/usr/bin/env bash
set -e

echo "install docker bash completion"
curl -L https://raw.githubusercontent.com/docker/cli/v$(docker version --format '{{.Server.Version}}' | sed 's/-.*//')/contrib/completion/bash/docker -o /etc/bash_completion.d/docker

echo "install docker-compose bash completion"
sudo curl \
    -L https://raw.githubusercontent.com/docker/compose/1.29.2/contrib/completion/bash/docker-compose \
    -o /etc/bash_completion.d/docker-compose

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You should not use the Open SSH client that comes with Git for Windows. Instead, Windows 10 has its own implementation of Open SSH that is integrated with the system. To achieve this:

1. Start the ssh-agent from Windows Services:

• Type Services in the Start Menu or Win+R and then type services.msc to launch the Services window;
• Find the OpenSSH Authentication Agent in the list and double click on it;
• In the OpenSSH Authentication Agent Properties window that appears, choose Automatic from the Startup type: dropdown and click Start from Service status:. Make sure it now says Service status: Running.

2. Configure Git to use the Windows 10 implementation of OpenSSH by issuing the following command in Powershell:

git config --global core.sshCommand C:/Windows/System32/OpenSSH/ssh.exe

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    [HtmlTargetElement(Attributes = ControllersAttributeName)]
    [HtmlTargetElement(Attributes = ActionsAttributeName)]
    [HtmlTargetElement(Attributes = RouteAttributeName)]
    [HtmlTargetElement(Attributes = ClassAttributeName)]
    public class ActiveRouteTagHelper : TagHelper
    {
        private const string ActionsAttributeName = "asp-active-actions";
        private const string ControllersAttributeName = "asp-active-controllers";
        private const string ClassAttributeName = "asp-active-class";
        private const string RouteAttributeName = "asp-active-route";

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#!/bin/bash

if [ -z $1 ]; then
        echo "Accepted parameter are either local or oracle"
elif [ $1 == "local" ]; then
        cat << EOF > /etc/yum.repos.d/local-oracle-ol8.repo
[local_ol8_baseos_latest]
name=Oracle Linux 8 BaseOS Latest (\$basearch)
baseurl=http://oelrepo.zarimpun.com/OracleLinux/OL8/baseos/latest/\$basearch/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle

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Cryptography Lab

1. Symmetric encryption  รหัสเดียวกันสำหรับเข้ารหัสและถอดรหัส
ข้อเด่น 1. เร็ว 2. คีย์ขนาดเล็กก็ปลอดภัย 256 บิต ก็ปลอดภัยมากๆ AES-256
ข้อเสีย 1. ส่งคีย์ข้ามอินเทอร์เน็ตยาก หรือถึงขั้นเป็นไปไม่ได้
2. Asymmetric encryption กุญแจคู่ ประกอบด้วยกุญแจส่วนตัวและกุญแจสาธารณะ
(Private key, Public key)
- ถ้าตัวใดตัวหนึ่งใช้เข้ารหัส ต้องใช้อีกตัวหนึ่งถอดรหัส
- ถ้า Public key หาย สามารถสร้างใหม่จาก Private key ได้
 แต่ถ้า Private key หาย ไม่สามารถสร้างใหม่ได้

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Symmetic encryption

For symmetic encryption, you can use the following:

To encrypt:

openssl aes-256-cbc -salt -a -e -in plaintext.txt -out encrypted.txt

To decrypt:

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