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Expand Down Expand Up @@ -58,27 +58,7 @@ <h1><a href="/dai-ma-pian-duan.html"> 代码片段 </a></h1>
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<h4><code>-hl</code> 参数</h4>
<div class="highlight"><pre><span class="n">ls</span> <span class="o">-</span><span class="n">hl</span>
<span class="o">-</span><span class="n">h</span><span class="p">,</span> <span class="o">--</span><span class="n">human</span><span class="o">-</span><span class="n">readable</span>
<span class="n">with</span> <span class="o">-</span><span class="n">l</span><span class="p">,</span> <span class="n">print</span> <span class="n">sizes</span> <span class="n">in</span> <span class="n">human</span> <span class="n">readable</span> <span class="n">format</span> <span class="p">(</span><span class="n">e</span><span class="p">.</span><span class="n">g</span><span class="p">.,</span> <span class="mi">1</span><span class="n">K</span> <span class="mi">234</span><span class="n">M</span> <span class="mi">2</span><span class="n">G</span><span class="p">)</span>
</pre></div>


<div class="highlight"><pre><span class="err">$</span> <span class="n">df</span> <span class="o">-</span><span class="n">hl</span>
<span class="n">Filesystem</span> <span class="n">Size</span> <span class="n">Used</span> <span class="n">Avail</span> <span class="n">Use</span><span class="o">%</span> <span class="n">Mounted</span> <span class="n">on</span>
<span class="o">/</span><span class="n">dev</span><span class="o">/</span><span class="n">sda5</span> <span class="mi">92</span><span class="n">G</span> <span class="mi">20</span><span class="n">G</span> <span class="mi">68</span><span class="n">G</span> <span class="mi">23</span><span class="o">%</span> <span class="o">/</span>
<span class="n">none</span> <span class="mf">4.0</span><span class="n">K</span> <span class="mi">0</span> <span class="mf">4.0</span><span class="n">K</span> <span class="mi">0</span><span class="o">%</span> <span class="o">/</span><span class="n">sys</span><span class="o">/</span><span class="n">fs</span><span class="o">/</span><span class="n">cgroup</span>
<span class="n">udev</span> <span class="mf">2.9</span><span class="n">G</span> <span class="mf">4.0</span><span class="n">K</span> <span class="mf">2.9</span><span class="n">G</span> <span class="mi">1</span><span class="o">%</span> <span class="o">/</span><span class="n">dev</span>
<span class="n">tmpfs</span> <span class="mi">584</span><span class="n">M</span> <span class="mf">1.3</span><span class="n">M</span> <span class="mi">582</span><span class="n">M</span> <span class="mi">1</span><span class="o">%</span> <span class="o">/</span><span class="n">run</span>
<span class="n">none</span> <span class="mf">5.0</span><span class="n">M</span> <span class="mi">0</span> <span class="mf">5.0</span><span class="n">M</span> <span class="mi">0</span><span class="o">%</span> <span class="o">/</span><span class="n">run</span><span class="o">/</span><span class="n">lock</span>
<span class="n">none</span> <span class="mf">2.9</span><span class="n">G</span> <span class="mi">21</span><span class="n">M</span> <span class="mf">2.9</span><span class="n">G</span> <span class="mi">1</span><span class="o">%</span> <span class="o">/</span><span class="n">run</span><span class="o">/</span><span class="n">shm</span>
<span class="n">none</span> <span class="mi">100</span><span class="n">M</span> <span class="mi">32</span><span class="n">K</span> <span class="mi">100</span><span class="n">M</span> <span class="mi">1</span><span class="o">%</span> <span class="o">/</span><span class="n">run</span><span class="o">/</span><span class="n">user</span>
</pre></div>


<h4><code>man</code>命令比<code>help</code>更可阅读</h4>
<h4>python logging</h4>
<h4>python logging</h4>
<div class="highlight"><pre><span class="n">import</span> <span class="n">logging</span>
<span class="n">logging</span><span class="p">.</span><span class="n">basicConfig</span><span class="p">(</span><span class="n">filename</span> <span class="o">=</span> <span class="n">os</span><span class="p">.</span><span class="n">path</span><span class="p">.</span><span class="n">join</span><span class="p">(</span><span class="n">os</span><span class="p">.</span><span class="n">getcwd</span><span class="p">(),</span> <span class="err">&#39;</span><span class="n">log</span><span class="p">.</span><span class="n">txt</span><span class="err">&#39;</span><span class="p">),</span> <span class="n">level</span> <span class="o">=</span> <span class="n">logging</span><span class="p">.</span><span class="n">DEBUG</span><span class="p">)</span>
<span class="n">logging</span><span class="p">.</span><span class="n">debug</span><span class="p">(</span><span class="err">&#39;</span><span class="n">this</span> <span class="n">is</span> <span class="n">a</span> <span class="n">message</span><span class="err">&#39;</span><span class="p">)</span>
Expand Down Expand Up @@ -122,20 +102,26 @@ <h4>python 下载静态文件,如,mp3</h4>
</pre></div>


<h4>shell: count files in dir</h4>
<p><code>ls -1 | wc -l</code></p>
<h4>shell: size of dir</h4>
<p><code>du -hl dir/</code></p>
<h4>升级pip</h4>
<p><code>easy_install -U pip</code> </p>
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Expand All @@ -147,10 +133,10 @@ <h4>Category</h4>
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