re><code class=language-command>$ mysql -u root -ppassword test -e  &#34;update ratings set rating=1 where reviewid=1;select * from ratings;&#34;
&#43;----------&#43;--------&#43;
| ReviewID | Rating |
&#43;----------&#43;--------&#43;
|        1 |      1 |
|        2 |      4 |
&#43;----------&#43;--------&#43;</code></pre><h2 id=-ip->查找虚拟机的 IP 地址，用来加入服务网格</h2><p>虚拟机端：</p><pre><code class=language-command>$ hostname -I</code></pre><h2 id=-mysql->在网格中注�