https://kangkun-lee.github.io/Recent content on kangkun-lee blogHugokoSat, 14 Feb 2026 00:10:00 +0900https://kangkun-lee.github.io/notes/%EC%96%B4%EB%96%A4-%EB%A7%81%ED%81%ACurl%EC%97%90-%EC%A0%91%EC%86%8D%ED%95%98%EB%A9%B4-%EC%96%B4%EB%96%A4-%EC%9D%BC%EC%9D%B4-%EC%9D%BC%EC%96%B4%EB%82%A0%EA%B9%8C/Sat, 14 Feb 2026 00:10:00 +0900https://kangkun-lee.github.io/notes/%EC%96%B4%EB%96%A4-%EB%A7%81%ED%81%ACurl%EC%97%90-%EC%A0%91%EC%86%8D%ED%95%98%EB%A9%B4-%EC%96%B4%EB%96%A4-%EC%9D%BC%EC%9D%B4-%EC%9D%BC%EC%96%B4%EB%82%A0%EA%B9%8C/<h1 id="1-링크를-클릭하면-브라우저가-제일-먼저-하는-일">1) 링크를 클릭하면, 브라우저가 제일 먼저 하는 일</h1> <h2 id="1-1-url-해석">1-1) URL 해석</h2> <p>예: <code>https://example.com/products/123</code></p> <ul> <li><code>https</code>: 통신 규칙(보안 포함)</li> <li><code>example.com</code>: 서버 주소(도메인)</li> <li><code>/products/123</code>: 서버 안에서 &ldquo;어떤 자원/페이지&quot;를 원하는지</li> </ul> <h2 id="1-2-dns-조회-도메인--ip">1-2) DNS 조회 (도메인 → IP)</h2> <ul> <li>브라우저는 <code>example.com</code>이 어느 컴퓨터(IP) 인지 알아야 접속 가능함</li> <li>그래서 캐시(브라우저/OS/공유기) → 없으면 DNS 서버에 물어봐서 IP를 얻음</li> </ul> <hr> <h1 id="2-서버랑-연결-맺기-네트워크-레벨">2) 서버랑 연결 맺기 (네트워크 레벨)</h1> <h2 id="2-1-tcp-연결--https면-tls-핸드셰이크">2-1) TCP 연결 + (HTTPS면) TLS 핸드셰이크</h2> <ul> <li>TCP: &ldquo;연결 통로&rdquo; 만드는 절차</li> <li>TLS(HTTPS): &ldquo;암호화 통로&rdquo; 만드는 절차 (인증서 확인 포함)</li> </ul> <p>이 단계가 끝나야 &ldquo;HTTP 요청&quot;을 보낼 수 있음</p>https://kangkun-lee.github.io/notes/machine-learning-%EC%9D%B4%EB%9E%80/Tue, 06 Jan 2026 11:04:00 +0900https://kangkun-lee.github.io/notes/machine-learning-%EC%9D%B4%EB%9E%80/<h1 id="machine-learning-이란">$Machine$ $Learning$ $이란$</h1> <h2 id="machine-learning의-개념">Machine Learning의 개념</h2> <p>머신러닝(Machine Learning)은 <strong>명시적으로 규칙을 다 코딩하지 않아도</strong>, 데이터를 통해 <strong>패턴(규칙)을 학습</strong>해서 예측/분류/추천 같은 일을 하도록 만드는 방법이다.</p> <p>예를 들어,</p> <ul> <li>“스팸 메일은 이런 단어가 많으면 스팸” 같은 규칙을 사람이 하나하나 만들기보다는,</li> <li>스팸/정상 메일 데이터를 많이 보여주고 <strong>스스로 기준을 찾게</strong> 만드는 방식이다.</li> </ul> <p>즉, 머신러닝은 이런 흐름으로 이해하면 된다.</p> <ol> <li>데이터 수집</li> <li>특징(feature) 만들기</li> <li>모델(model)이 패턴 학습</li> <li>새로운 데이터에 대해 예측/판단</li> </ol> <hr> <h3 id="machine--learning">Machine + Learning</h3> <h4 id="machine">$Machine$</h4> <p>여기서 Machine은 “기계”라기보다, <strong>학습을 수행하는 시스템</strong>(프로그램/모델)을 말한다.</p>https://kangkun-lee.github.io/notes/linear-regression-%EC%9D%98-%EC%9D%98%EB%AF%B8/Wed, 31 Dec 2025 00:00:00 +0900https://kangkun-lee.github.io/notes/linear-regression-%EC%9D%98-%EC%9D%98%EB%AF%B8/<blockquote> <h3 id="linear--regression">$Linear + Regression$</h3></blockquote> <p><svg viewBox="0 0 520 300" width="100%" height="300" xmlns="http://www.w3.org/2000/svg" role="img" aria-label="Linear Regression Chart"><defs><marker id="arrow" viewBox="0 0 10 10" refX="9" refY="5" markerWidth="6" markerHeight="6" orient="auto-start-reverse"><path d="M 0 0 L 10 5 L 0 10 z" fill="currentColor"/></marker></defs><g stroke="currentColor" stroke-opacity="0.1" stroke-width="1"><line x1="40" y1="50" x2="500" y2="50"/><line x1="40" y1="100" x2="500" y2="100"/><line x1="40" y1="150" x2="500" y2="150"/><line x1="40" y1="200" x2="500" y2="200"/><line x1="100" y1="20" x2="100" y2="250"/><line x1="200" y1="20" x2="200" y2="250"/><line x1="300" y1="20" x2="300" y2="250"/><line x1="400" y1="20" x2="400" y2="250"/></g><line x1="40" y1="250" x2="500" y2="250" stroke="currentColor" stroke-width="2" marker-end="url(#arrow)"/><line x1="40" y1="250" x2="40" y2="20" stroke="currentColor" stroke-width="2" marker-end="url(#arrow)"/><g stroke="currentColor" stroke-width="1" stroke-dasharray="4,2" opacity="0.6"><line x1="90" y1="170" x2="90" y2="180"/><line x1="160" y1="150" x2="160" y2="155"/><line x1="240" y1="120" x2="240" y2="130"/><line x1="320" y1="95" x2="320" y2="105"/><line x1="420" y1="70" x2="420" y2="75"/></g><line x1="40" y1="195" x2="480" y2="55" stroke="currentColor" stroke-width="2.5"/><g fill="currentColor" stroke="currentColor" stroke-width="1" fill-opacity="0.7"><circle cx="90" cy="170" r="4"/><circle cx="160" cy="150" r="4"/><circle cx="240" cy="120" r="4"/><circle cx="320" cy="95" r="4"/><circle cx="420" cy="70" r="4"/></g><text x="490" y="275" font-family="Times New Roman, serif" font-style="italic" font-size="16" fill="currentColor">x</text><text x="10" y="30" font-family="Times New Roman, serif" font-style="italic" font-size="16" fill="currentColor">y</text><text x="380" y="50" font-family="Times New Roman, serif" font-size="14" fill="currentColor">ŷ = β₀ + β₁x</text></svg></p>https://kangkun-lee.github.io/2024/01/12/hello-world/Fri, 12 Jan 2024 00:00:00 +0900https://kangkun-lee.github.io/2024/01/12/hello-world/<p>Welcome to <a href="https://gohugo.io/">Hugo</a>! This is your very first post. Check <a href="https://gohugo.io/documentation/">documentation</a> for more info. If you get any problems when using Hugo, you can find the answer in <a href="https://gohugo.io/troubleshooting/">troubleshooting</a> or ask me on <a href="https://github.com/gohugoio/hugo/issues">GitHub</a>.</p> <h2 id="quick-start">Quick Start</h2> <h3 id="create-a-new-post">Create a new post</h3> <div class="highlight"><div class="chroma"> <table class="lntable"><tr><td class="lntd"> <pre tabindex="0" class="chroma"><code><span class="lnt">1 </span></code></pre></td> <td class="lntd"> <pre tabindex="0" class="chroma"><code class="language-bash" data-lang="bash"><span class="line"><span class="cl">hugo new posts/my-new-post.md </span></span></code></pre></td></tr></table> </div> </div><p>More info: <a href="https://gohugo.io/content-management/">Content Management</a></p> <h3 id="run-server">Run server</h3> <div class="highlight"><div class="chroma"> <table class="lntable"><tr><td class="lntd"> <pre tabindex="0" class="chroma"><code><span class="lnt">1 </span></code></pre></td> <td class="lntd"> <pre tabindex="0" class="chroma"><code class="language-bash" data-lang="bash"><span class="line"><span class="cl">hugo server </span></span></code></pre></td></tr></table> </div> </div><p>More info: <a href="https://gohugo.io/commands/hugo_server/">Hugo Server</a></p> <h3 id="generate-static-files">Generate static files</h3> <div class="highlight"><div class="chroma"> <table class="lntable"><tr><td class="lntd"> <pre tabindex="0" class="chroma"><code><span class="lnt">1 </span></code></pre></td> <td class="lntd"> <pre tabindex="0" class="chroma"><code class="language-bash" data-lang="bash"><span class="line"><span class="cl">hugo </span></span></code></pre></td></tr></table> </div> </div><p>More info: <a href="https://gohugo.io/commands/">Hugo Commands</a></p> <h3 id="deploy-to-github-pages">Deploy to GitHub Pages</h3> <p>GitHub Actions will automatically deploy your site when you push to the main branch.</p>