# 下載docker-compose
# version, 根據自己的需求調整
sudo curl -L "https://github.com/docker/compose/releases/download/${version}/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose

# 改變權限
sudo chmod +x /usr/local/bin/docker-compose

# 查看docker-compose版本
docker-compose -v

# 使用fallocate 創建出一個4G的swapfile
sudo fallocate -l 4G /var/swapfile
# 更改檔案權限
sudo chmod 600 /var/swapfile
# 將檔案設置成swap file
sudo mkswap /var/swapfile
# 啟用記憶體交換空間
sudo swapon /var/swapfile

docker ps

docker stats

sudo fallocate -l 4G /var/swapfile

sudo chmod 600 /var/swapfile

sudo mkswap /var/swapfile

sudo swapon /var/swapfile

swapon -s

free -h

grep -i swap /proc/meminfo

vim /etc/fstab
# 加入這段
/var/swapfile swap swap defaults 0 0

cat /proc/sys/vm/swappiness

sudo sysctl vm.swappiness=10

vim /etc/sysctl.conf
# 加入這段
vm.swappiness=10

# 停用記憶體交換空間
sudo swapoff -v /var/swapfile
# 刪除檔案
sudo rm /var/swapfile

# 更新套件列表及版本資訊
sudo apt-get update

# 透過curl去抓install script
curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.5/install.sh | bash

# 設定一下nvm環境變數
export NVM_DIR="$([ -z "${XDG_CONFIG_HOME-}" ] && printf %s "${HOME}/.nvm" || printf %s "${XDG_CONFIG_HOME}/nvm")"
[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh" # This loads nvm

# reload
source ~/.bashrc
source ~/.zshrc

# 查看目前可以被安裝的node version
nvm ls-remote

# install node.js
nvm install node

# list installed node version
nvm ls

# choose nvm version
nvm use node

# 設定node版本為default
nvm alias default node

# 更新套件列表及版本資訊
sudo apt-get update

# 安裝curl gnupg ca-certificates 套件
sudo apt-get install -y ca-certificates curl gnupg

# 製作apt key要放的資料夾
sudo mkdir -p /etc/apt/keyrings

# 製作gpg key並放到剛建立好的資料夾內
curl -fsSL https://deb.nodesource.com/gpgkey/nodesource-repo.gpg.key | sudo gpg --dearmor -o /etc/apt/keyrings/nodesource.gpg

# 安裝對應node version source list
# 假設今天想要安裝16, 那這邊就要設定16 
NODE_MAJOR=20
# 接著將source放進去nodesource.list檔案裡面
echo "deb [signed-by=/etc/apt/keyrings/nodesource.gpg] https://deb.nodesource.com/node_$NODE_MAJOR.x nodistro main" | sudo tee /etc/apt/sources.list.d/nodesource.list

# 再跑一次更新套件列表以及版本, 這邊會根據剛剛設定好的source去把對應的node.js version拉下來
sudo apt-get update

# 透過policy可以確認剛剛的設定是否成功, 可以看到相關訊息
apt policy nodejs

# 安裝node.js, 會自動幫你抓當前版本最新, 也就是說你剛剛設定16的話, 就會去幫你抓node.js 16最新的版本
sudo apt-get install nodejs -y

apt-get purge nodejs &&\
rm -r /etc/apt/sources.list.d/nodesource.list &&\
rm -r /etc/apt/keyrings/nodesource.gpg

# 更新yarn key
curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
# 設定PPA為16版, 這個是舊版做法
curl -fsSL https://deb.nodesource.com/setup_16.x | sudo -E bash -

# elasticsearch_health_check.sh
#!/bin/bash

# Elasticsearch cluster URL
ES_URL="https://localhost:9200"

# call cluster health api, 非常推薦用這串參數
RESPONSE=$(curl -s -o response.txt -w "%{http_code}" --user username:password "${ES_URL}/_cluster/health?level=shards&wait_for_status=green&timeout=60s")

# Extract the cluster status, 這邊是用jq解析, 看個人喜好
STATUS=$(cat response.txt | jq -r .status)

# Logic to handle the status
if [ "$STATUS" == "green" ]; then
  # 節點綠燈時輸出的訊息
elif [ "$STATUS" == "yellow" ]; then
  # 節點黃燈時輸出的訊息
else
  # 節點出現嚴重錯誤時輸出的訊息
fi

if [ -n "$message" ]; then
  # 可以串接至個人使用的通訊軟體
fi

# api endpoint
_cluster/health

# 為什麼會設定level是shards呢？
# 監控顧名思義就是要在出現問題時, 要有相關紀錄可以排查問題, 所以一定是希望資訊越多越好
# 所以蠻推薦調整一下level
level=shards

# 等待節點狀態變成綠色
wait_for_status=green

# 預設30s, 建議可以調整一下
timeout=60s

# 查看目前系統有哪些crontab
crontab -l

# 設定crontab
crontab -e

# 每十分鐘執行一次剛剛寫的shell script, 已達到定期檢查elasticsearch健康度的需求
*/10 * * * * elasticsearch_health_check.sh

# 透過homebrew安裝v8
brew install v8
# 然後指定bundle config
bundle config build.libv8 --with-system-v8

bundle install

# 新增一個bundle lock 為ruby環境
bundle lock --add-platform ruby

# 透過brew安裝
brew install rbenv
# 安裝指定ruby版本
rbenv install 2.7.4
# 記得安裝一個新的ruby版本一定要執行這個指令
rbenv rehash

# 這邊有發現幾行的錯誤訊息, 看起來似乎跟macos自身帶的commandLineTools有關
No receipt for 'com.apple.pkg.CLTools_Executables' found at '/'.

No receipt for 'com.apple.pkg.DeveloperToolsCLILeo' found at '/'.

No receipt for 'com.apple.pkg.DeveloperToolsCLI' found at '/'.

Node.js configure: Found Python 3.9.13...
WARNING: --openssl-no-asm will result in binaries that do not take advantage
         of modern CPU cryptographic instructions and will therefore be slower.
         Please refer to BUILDING.md
WARNING: warnings were emitted in the configure phase

xcode-select -print-path
# 你會找到你的xcode commandLineTools裝在哪裡
# /Library/Developer/CommandLineTools

# 移除xcode commandLineTools
sudo rm -r /Library/Developer/CommandLineTools

# 重新安裝xcode commandLineTools
xcode-select --install

# Switch Xcode's path
sudo xcode-select -switch /Library/Developer/CommandLineTools

# Reset Xcode's path
sudo xcode-select --reset

brew install gnupg

gpg --full-generate-key

# 這邊可以選擇你要使用哪一個金鑰種類
Please select what kind of key you want:
   (1) RSA and RSA
   (2) DSA and Elgamal
   (3) DSA (sign only)
   (4) RSA (sign only)
   (9) ECC (sign and encrypt) *default*
  (10) ECC (sign only)
  (14) Existing key from card

# 我這邊使用1 RSA and RSA

# 這邊可以輸入金鑰的長度
RSA keys may be between 1024 and 4096 bits long.
# 我這邊使用4096, 最高最強悍

# 這邊可以選擇你的金鑰要多久後過期
Please specify how long the key should be valid.
         0 = key does not expire
      <n>  = key expires in n days
      <n>w = key expires in n weeks
      <n>m = key expires in n months
      <n>y = key expires in n years
# 這邊為了省事, 我是直接選擇不過期

# 接著會要你填一些username and email之類的訊息, 就照實填寫
# 產生完成之後你會看到pub uid sub

# 可以使用這個指令顯示出所有包含公鑰與私鑰的GPG keys
gpg --list-secret-keys

# Fingerprint = sec 那一段複製起來
gpg --armor --export <Fingerprint>

# 你會拿到這段然後把這段貼到Github上
-----BEGIN PGP PUBLIC KEY BLOCK-----
key
-----END PGP PUBLIC KEY BLOCK-----

# 僅限此倉庫
git config user.signingkey Fingerprint

# 全域設定
git config --global user.signingkey Fingerprint

# 如果不想要每次commit都加-s可以用以下設定
# 僅限此倉庫
git config commit.gpgsign true

# 全域設定
git config --global commit.gpgsign true

error: gpg failed to sign the data
fatal: failed to write commit object

# 執行這段檢查一下
echo "test" | gpg --clearsign

gpg: signing failed: Inappropriate ioctl for device
gpg: [stdin]: clear-sign failed: Inappropriate ioctl for device

# 解決方式, 加到.zshrc之類的環境變數裡面, 然後重讀一次設定檔即可
export GPG_TTY=$(tty)