sudo vim /etc/mysql/mysql.conf.d/mysqld.cnf

sudo vim /var/log/mysql/error.log

apt list --installed

1. 安裝 MySQL 套件
    ```
    apt install build-essential mysql-server libmysqlclient-dev imagemagick libmagickwand-dev
    ```
2. 安裝後驗證 MySQL Version
    ```
    mysql -u root -p
    ```

1. 建立 Redmine 使用者，資料放在 `/data/redmine`
    ```
    adduser --system \
        --shell /bin/bash \
        --gecos 'Redmine Administrator' \
        --group \
        --home /data/redmine redmine;
    ```
2. 建立 rvm group
    ```
    groupadd rvm
    ```

3. 允許 redmine 可以 sudo
    ```
    adduser redmine sudo
    ```

4. 設定 redmine 密碼
    ```
    passwd redmine
    ```

5. 將 redmine 使用者加入 rvm 群組
    ```
    usermod -a -G rvm redmine
    ```

1. 安裝gnupg2
    ```
    sudo apt install gnupg2
    ```
2. 安裝 GPG keys:
    ```
    gpg2 --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB
    ```
3. 安裝 RVM
    ```
    \curl -sSL https://get.rvm.io | bash -s stable
    ```
4. 讓 rvm 指令生效
    ```
    source /data/redmine/.rvm/scripts/rvm
    ```
5. 確認安裝的RVM版本
    ```
    rvm --version
    ```

1. 檢查 rvm 必要的套件
    ```
    rvm requirements
    ```
2. 安裝指定的 ruby version
    ```
    rvm install ${RUBY_VERSION}
    ```
3. 將此版本設定為預設
    ```
    rvm use ${RUBY_VERSION} --default
    ```
4. 確認安裝的 Ruby 版本
    ```
    ruby --version
    ```

1. 安裝 Passenger PGP key 和 HTTPS support for package manager
    ```
    apt install -y dirmngr gnupg
    ```
    ```
    apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 561F9B9CAC40B2F7 
    ```
    ```
    apt install -y apt-transport-https ca-certificates
    ```
2. Add passenger APT repository
    ```
    sh -c 'echo deb https://oss-binaries.phusionpassenger.com/apt/passenger xenial main > /etc/apt/sources.list.d/passenger.list'
    ```
    ```
    apt update
    ```
3. 安裝 Passenger and NGINX
    ```
    apt install -y nginx-extras passenger
    ```

1. 編輯 Nginx 設定檔案
    ```
    vi /etc/nginx/nginx.conf
    ```
2. 移除此行註解#：`include /etc/nginx/passenger.conf;`
    ```conf
    ...
    ##
    # Phusion Passenger config
    ##
    # Uncomment it if you installed passenger or passenger-enterprise
    ##

    include /etc/nginx/passenger.conf;
    ```
3. 接下來要調整 Nginx 的網站設定，所以建議先備份原本的設定
    ```
    cp /etc/nginx/sites-available/default /etc/nginx/sites-available/default.orig
    ```
5. 編輯 Nginx 的網站設定
    ```
    vi /etc/nginx/sites-available/default
    ```
6. 調整網站的根目錄位置以及 Passenger 設定
    ```
    #root /var/www/html; #將原本的註解或是移除
    root /data/redmine/current/public;
    passenger_enabled on;
    client_max_body_size 10m;
    ```
7. 把 location 段落註解
    ```
    #location / {
            # First attempt to serve request as file, then
            # as directory, then fall back to displaying a 404.
    #       try_files $uri $uri/ =404;
    #}
    ```

1. 登入 MySQL
    ```
    mysql -u root -p
    ```
3. 創建 redmine 資料庫
    ```
    CREATE DATABASE redmine CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
    ```
4. 創建 redmine 使用者，密碼記得自行調整
    ```
    CREATE USER 'redmine'@'localhost' IDENTIFIED BY 'password';
    ```
5. 給予使用者權限
    ```
    GRANT ALL PRIVILEGES ON redmine.* TO 'redmine'@'localhost';
    ```
6. 使權限生效
    ```
    FLUSH PRIVILEGES;
    ```
7. 離開 MySQL
    ```
    quit;
    ```

1. 到[官方網站](https://www.redmine.org/projects/redmine/wiki/Download)了解最新的stable版本（筆者安裝版本為 4.1.1）
2. 前往放置 redmine image 的目錄
    ```
    cd /data/redmine
    ```
3. 下載官方 image 並解壓縮
    ```
    wget https://www.redmine.org/releases/redmine-4.1.1.tar.gz
    ```
    ```
    tar zxvf redmine-4.1.1.tar.gz
    ```
4. 建立連結資料夾 current
    ```
    ln -s redmine-4.1.1 current
    ```
5. 前往連結資料夾
    ```
    cd current
    ```

1. 將 redmine 的資料庫範例設定檔複製一份
    ```
    cp -pR config/database.yml.example config/database.yml
    ```
2. 編輯資料庫設定檔案
    ```
    vi config/database.yml
    ```  
3.  調整 production 的資訊即可，內容填上 STEP7 建立的使用者資訊即可
    ```yml
    production:
      adapter: mysql2
      database: redmine
      host: localhost
      username: redmine
      password: "your password"
      # Use "utf8" instead of "utfmb4" for MySQL prior to 5.7.7
      encoding: utf8mb4
    ```

1. 先確認當前資料夾為 `/data/redmine/current`
    ```
    pwd
    ```
2. 執行 gem, bundle 安裝依賴套件
    ```
    gem install bundler
    ```
    ```
    bundle install --without development test
    ```
    > 如果安裝過程中遇到錯誤可能是因為沒有安裝到 ruby 的套件  
    > 1. 先安裝 `sudo apt-get install ruby-dev`  
    > 2. 再執行一次 `bundle install --without development test` 確認有無報錯

1. 先確認當前資料夾為 /data/redmine/current
    ```
    pwd
    ```
2. 用 Rake 啟動 redmine
    ```
    bundle exec rake generate_secret_token
    ```
3. Migrate Database Schema(初始化資料庫)
    ```
    RAILS_ENV=production bundle exec rake db:migrate
    ```
4. Load Initial Data(下面會請你選擇語言，預設為英文，語言後續都能再做調整)
    ```
    RAILS_ENV=production bundle exec rake redmine:load_default_data
    ```
5. 用 Nginx 重啟 Redmine
    ```
    sudo systemctl restart nginx
    ```

1. 先進入 redmine 的 plugin 資料夾
    ```
    cd /current/plugins
    ```
2. 下載 plugin，最新的 release 請參考[官方](https://github.com/jgraichen/redmine_dashboard)
    ```
    wget https://github.com/jgraichen/redmine_dashboard/archive/v2.9.0.tar.gz
    ```
3. 解壓縮檔案
    ```
    tar zxvf v2.9.0.tar.gz
    ```
4. 移除壓縮檔
    ```
    rm v2.9.0.tar.gz
    ```
6.  安裝相關套件
    ```
    bundle install
    ```
7. 將套件相關 DB 進行 migrate 到 production
    ```
    rake db:migrate RAILS_ENV=production
    ```
8. 將套件安裝至 production
    ```
    bundle exec rake redmine:plugins:migrate RAILS_ENV=production
    ```
9. 安裝完畢後重啟讓設定生效
    ```
    sudo systemctl restart nginx
    ```

1. 進入 redmine 設定的資料夾
    ```
    cd /current/config
    ```
2. 將 redmine 的設定範例設定檔複製一份
    ```
    cp -pR configuration.yml.example configuration.yml
    ```
3. 編輯 redmine 設定檔案
    ```
    vi configuration.yml
    ```
4. 調整 production 的資訊即可，下面用 Gmail 作為範例
    ```
    production:
      delivery_method: :smtp
      smtp_settings:
        enable_starttls_auto: true
        address: "smtp.gmail.com"
        port: 587
        domain: "smtp.gmail.com" # 'your.domain.com' for GoogleApps
        authentication: :plain
        user_name: "email"
        password: "email pw"
     ```
5. 設定完畢後重啟生效
    ```
    sudo systemctl restart nginx
    ```

sudo apt-get install ssh -y

apt-get update

ssh-keygen
cd .ssh
mv id_rsa.pub authorized_keys

sudo vi /etc/ssh/sshd_config

sudo service ssh restart

sudo vi /etc/ssh/sshd_config

sudo service ssh restart

sudo apt-get install ufw
sudo ufw enable
sudo ufw allow from 192.168.0.0/12(你允許的網路環境)

sudo update-alternatives — set editor /usr/bin/vim.basic

cd /proc/sys/net/ipv4/conf

sudo vi /etc/network/interfaces
auto ens160
iface ens160 inet static
address 192.168.3.60
netmask 255.255.0.0
gateway 192.168.1.254
dns-nameservers 168.95.1.1 168.95.192.1

sudo /etc/init.d/networking restart

network:
    ethernets:
        enp0s3:
            addresses: [192.168.0.10/24]
            gateway4: 192.168.0.1
            nameservers:
              addresses: [8.8.8.8,8.8.4.4]
            dhcp4: no
    version: 2

sudo netplan try

sudo vi /etc/netplan/00-installer-config.yaml

# This is the network config written by 'subiquity'
network:
  ethernets:
    ens160:
      addresses: [your_ip_address/12]
      gateway4: your_gateway
      optional: true
      nameservers:
        addresses: [168.95.1.1,168.95.192.1,8.8.8.8,8.8.4.4]
      dhcp4: no
  version: 2

$ sudo adduser newuser
$ usermod -aG sudo newuser

sudo deluser — remove-home userNameHere

su — newuser
mkdir ~/.ssh
vim ~/.ssh/authorized_keys

$ sudo cat /etc/group | grep sudo
$ sudo cat /etc/group | grep admin

sudo lvextend -rl +100%FREE /dev/mapper/ubuntu — vg-ubuntu — lv