Developer Essentials

Developer Essentials Cheatsheets

Quick references for everyday developer 工具s. Copy-paste ready commands.

📚 Git Cheatsheet Basic Commands # 初始化 repo git init

# Clone repo git clone git clone --depth 1 # Shallow clone (faster)

# 状态 & 信息 git 状态 git 记录 --oneline -n 10 git diff git diff --staged

Staging & Commits git 添加 . # Stage all git 添加 -p # Stage interactively git commit -m "message" git commit --amend # Edit last commit git commit --amend --no-edit # Keep message

Branches git branch # 列出 branches git branch -a # 列出 all (including remote) git 检查out -b # 创建 & switch git switch # Switch branch git merge git rebase

Push & Pull git push origin git push -u origin # 设置 up流 git pull git pull --rebase git fetch origin

Undo & Fix git 恢复 # Discard changes git 恢复 --staged # Unstage git re设置 HEAD~1 # Undo last commit (keep changes) git re设置 --hard HEAD~1 # Destroy last commit git stash git stash pop

🐳 Docker Cheatsheet Images docker images # 列出 images docker pull docker build -t . docker build -t -f Dockerfile.dev . docker rmi docker image p运行e

ContAIners docker ps # 运行ning contAIners docker ps -a # All contAIners docker 运行 -d -p 8080:80 # Detach + port docker 运行 -it --rm bash # Interactive + 移除 docker exec -it bash docker 记录s -f # Follow 记录s docker 停止 docker rm docker rm -f # Force 移除

Docker Compose docker compose up -d docker compose down docker compose 记录s -f docker compose re启动 docker compose build

清理up docker 系统 p运行e -a # 移除 all unused docker 系统 df # Disk usage

☸️ Kubernetes (kubectl) Cheatsheet 上下文 & Config kubectl config 获取-上下文s kubectl config use-上下文 kubectl cluster-信息

获取 Resources kubectl 获取 pods kubectl 获取 pods -A # All namespaces kubectl 获取 服务s kubectl 获取 部署ments kubectl 获取 nodes kubectl 获取 ns # Namespaces kubectl 获取 all

Describe & 调试 kubectl describe pod kubectl 记录s kubectl 记录s -f # Follow kubectl exec -it -- bash kubectl top pods # Resource usage kubectl top nodes

应用ly & 删除 kubectl 应用ly -f manifest.yaml kubectl 应用ly -k ./ # Kustomize kubectl 删除 -f manifest.yaml kubectl 删除 pod

Quick Actions kubectl expose 部署ment --port=80 --type=LoadBalancer kubectl 扩展 部署ment --replicas=3 kubectl rollout re启动 部署ment/

🔍 jq Cheatsheet (JSON 处理器) Basic Queries # 身份 (pretty print) jq '.' file.json

# 获取 field jq '.name' file.json jq '.user.name' file.json

# Array 索引 jq '.[0]' file.json jq '.[0].name' file.json

Array Operations # Array length jq '. | length' file.json

# All items in array jq '.[]' file.json

# Map - 提取 field from array jq '.[].name' file.json jq '.[] | {name, emAIl}' file.json

# 过滤器 array jq '.[] | select(.age > 30)' file.json jq '.[] | select(.状态 == "active")' file.json

Trans格式化ions # 创建 new object jq '{user: .name, emAIl: .contact.emAIl}' file.json

# 添加/移除 fields jq '. + {timestamp: now}' file.json jq 'del(.password)' file.json

Useful Flags jq -r '.name' file.json # Raw 输出 (no quotes) jq -c '.' file.json # Compact (one line) jq -s '.' file1.json file2.json # Slurp multiple files

🌐 curl Cheatsheet Basic 请求s curl https://API.example.com curl -I https://example.com # Headers only curl -v https://example.com # Verbose

HTTP Methods curl -X POST https://API.example.com/data curl -X PUT https://API.example.com/data/1 curl -X 删除 https://API.example.com/data/1

Headers & Body curl -H "Content-Type: 应用/json" \ -H "Authorization: Bearer 令牌" \ https://API.example.com

curl -X POST -d '{"name":"test"}' \ -H "Content-Type: 应用/json" \ https://API.example.com

curl -X POST --data @file.json https://API.example.com

输出 & 下载 curl -o 输出.json https://API.example.com curl -O https://example.com/file.zip # Save with original name curl -L https://example.com # Follow redirects

🐧 Linux Essential Commands File Operations ls -la # 列出 all (including hidden) cp -r source dest # Copy recursive mv old new # Move/rename rm -rf dir # 移除 recursive force mkdir -p path/to/dir # 创建 parents too touch file chm