title: mysql_upgrade not found
body: <p>I've just upgrade my system, but Mysql don't start:</p>
  
  <pre><code>120319 15:20:39 [Note] Plugin 'FEDERATED' is disabled.
  mysqld: Table 'mysql.plugin' doesn't exist
  120319 15:20:39 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it.
  120319 15:20:39  InnoDB: Initializing buffer pool, size = 8.0M
  120319 15:20:39  InnoDB: Completed initialization of buffer pool
  120319 15:20:39  InnoDB: Started; log sequence number 0 43665
  120319 15:20:39 [ERROR] Can't start server : Bind on unix socket: No such file or directory
  120319 15:20:39 [ERROR] Do you already have another mysqld server running on socket: /var/run/mysqld/mysqld.sock ?
  120319 15:20:39 [ERROR] Aborting
  </code></pre>
  
  <p>so I am asked to run myslq_upgrade, but it's not present on the system...</p>
  
  <p>Any help?</p>