update doc

_sources/contact-us.md.txt

@@ -7,11 +7,17 @@
 使用疑问，意见可以直接在Issues里提出： [https://github.com/alibaba/arthas/issues](https://github.com/alibaba/arthas/issues)
 
 
+### 钉钉群
+
+Arthas开源交流钉钉群：21965291 ，搜索群号即可加入。
+
+![web console](_static/dingding_qr.jpg)
+
 ### QQ群
 
 Arthas开源交流QQ群：916328269
 
-### 钉钉群
+![web console](_static/qqgroup_qr.jpg)
+
 
-Arthas开源交流钉钉群：21965291 ，搜索群号即可加入。
 

_sources/quick-start.md.txt

@@ -15,7 +15,7 @@ java -jar arthas-demo.jar
 
 ## 2. 启动arthas
 
-在命令行下面执行：
+在命令行下面执行（使用和目标进程一致的用户启动，否则可能attach失败）：
 
 ```bash
 wget https://alibaba.github.io/arthas/arthas-boot.jar
@@ -97,8 +97,10 @@ java.home              /Library/Java/JavaVir
 
 ## 4. 通过thread命令来获取到`arthas-demo`进程的Main Class
 
+`thread 1`会打印线程ID 1的栈，通常是main函数的线程。
+
 ```bash
-$ thread -n -1 | grep 'main('
+$ thread 1 | grep 'main('
     at demo.MathGame.main(MathGame.java:17)
 ```
 

contact-us.html

@@ -102,8 +102,8 @@
 <li class="toctree-l1"><a class="reference internal" href="release-notes.html">Release Notes</a></li>
 <li class="toctree-l1 current"><a class="current reference internal" href="#">QQ群/钉钉群</a><ul>
 <li class="toctree-l2"><a class="reference internal" href="#issues">Issues</a></li>
-<li class="toctree-l2"><a class="reference internal" href="#qq">QQ群</a></li>
 <li class="toctree-l2"><a class="reference internal" href="#">钉钉群</a></li>
+<li class="toctree-l2"><a class="reference internal" href="#qq">QQ群</a></li>
 </ul>
 </li>
 </ul>
@@ -178,13 +178,15 @@
 <span id="issues"></span><h2>Issues<a class="headerlink" href="#issues" title="永久链接至标题">¶</a></h2>
 <p>使用疑问，意见可以直接在Issues里提出： <a class="reference external" href="https://github.com/alibaba/arthas/issues">https://github.com/alibaba/arthas/issues</a></p>
 </div>
-<div class="section" id="qq">
-<span id="qq"></span><h2>QQ群<a class="headerlink" href="#qq" title="永久链接至标题">¶</a></h2>
-<p>Arthas开源交流QQ群：916328269</p>
-</div>
 <div class="section" id="">
 <span id="id2"></span><h2>钉钉群<a class="headerlink" href="#" title="永久链接至标题">¶</a></h2>
 <p>Arthas开源交流钉钉群：21965291 ，搜索群号即可加入。</p>
+<p><img alt="web console" src="_images/dingding_qr.jpg" /></p>
+</div>
+<div class="section" id="qq">
+<span id="qq"></span><h2>QQ群<a class="headerlink" href="#qq" title="永久链接至标题">¶</a></h2>
+<p>Arthas开源交流QQ群：916328269</p>
+<p><img alt="web console" src="_images/qqgroup_qr.jpg" /></p>
 </div>
 </div>
 

en/_sources/quick-start.md.txt

@@ -96,8 +96,10 @@ java.home              /Library/Java/JavaVir
 
 ## 4. Get the Main Class of the `arthas-demo` process with the thread command
 
+`thread 1` will print the stack of the thread with ID 1, which usually the main function thread.
+
 ```bash
-$ thread -n -1 | grep 'main('
+$ thread 1 | grep 'main('
     at demo.MathGame.main(MathGame.java:17)
 ```
 

en/quick-start.html

@@ -268,7 +268,8 @@ java.home              /Library/Java/JavaVir
 </div>
 <div class="section" id="get-the-main-class-of-the-arthas-demo-process-with-the-thread-command">
 <span id="get-the-main-class-of-the-arthas-demo-process-with-the-thread-command"></span><h2>4. Get the Main Class of the <tt class="docutils literal">arthas-demo</tt> process with the thread command<a class="headerlink" href="#get-the-main-class-of-the-arthas-demo-process-with-the-thread-command" title="Permalink to this headline">¶</a></h2>
-<div class="highlight-bash notranslate"><div class="highlight hljs"><pre class="bash">$ thread -n -1 | grep &#x27;main(&#x27;
+<p><tt class="docutils literal">thread 1</tt> will print the stack of the thread with ID 1, which usually the main function thread.</p>
+<div class="highlight-bash notranslate"><div class="highlight hljs"><pre class="bash">$ thread 1 | grep &#x27;main(&#x27;
     at demo.MathGame.main(MathGame.java:17)
 </pre></div>
 </div>

quick-start.html

@@ -190,7 +190,7 @@ java -jar arthas-demo.jar
 </div>
 <div class="section" id="arthas">
 <span id="arthas"></span><h2>2. 启动arthas<a class="headerlink" href="#arthas" title="永久链接至标题">¶</a></h2>
-<p>在命令行下面执行：</p>
+<p>在命令行下面执行（使用和目标进程一致的用户启动，否则可能attach失败）：</p>
 <div class="highlight-bash notranslate"><div class="highlight hljs"><pre class="bash">wget https://alibaba.github.io/arthas/arthas-boot.jar
 java -jar arthas-boot.jar
 </pre></div>
@@ -265,7 +265,8 @@ java.home              /Library/Java/JavaVir
 </div>
 <div class="section" id="threadarthas-demomain-class">
 <span id="threadarthas-demomain-class"></span><h2>4. 通过thread命令来获取到<tt class="docutils literal">arthas-demo</tt>进程的Main Class<a class="headerlink" href="#threadarthas-demomain-class" title="永久链接至标题">¶</a></h2>
-<div class="highlight-bash notranslate"><div class="highlight hljs"><pre class="bash">$ thread -n -1 | grep &#x27;main(&#x27;
+<p><tt class="docutils literal">thread 1</tt>会打印线程ID 1的栈，通常是main函数的线程。</p>
+<div class="highlight-bash notranslate"><div class="highlight hljs"><pre class="bash">$ thread 1 | grep &#x27;main(&#x27;
     at demo.MathGame.main(MathGame.java:17)
 </pre></div>
 </div>