er">code</span>
</div><div class="ace_line"><span class="ace_gutter ace_gutter-cell" unselectable="on"></span><span class="ace_identifier">ls</span>
</div></div></div></div><div class="cell markdown-cell"><ol start="2">
<li>创建文件及vi编辑器。</li>
</ol>
</div><div class="cell code-cell"><div class="ace-chrome"><div class="ace_static_highlight ace_show_gutter" style="counter-reset:ace_line 0"><div class="ace_line"><span class="ace_gutter ace_gutter-cell" unselectable="on"></span><span class="ace_i