mysqld_safe啟動報錯 mysqld_safe The file /usr/local/mysql/bin/mysqld does not exist or is not executable

報錯（如下），但是使用mysqld直接啟動沒有問題。

150718 00:03:38 mysqld_safe Logging to '/var/log/mysqld.log'.
150718 00:03:38 mysqld_safe The file /usr/local/mysql/bin/mysqld
does not exist or is not executable. Please cd to the mysql installation
directory and restart this script from there as follows:
./bin/mysqld_safe&
See http://dev.mysql.com/doc/mysql/en/mysqld-safe.html for more information

[1]+  Exit 1                  mysqld_safe --skip-grant-tables --user=mysql

說明：mysqld_safe啟動腳本默認的從/usr/local/mysql目錄中讀取另外一個啟動腳本mysqld，因為我的安裝目錄為/home/mysql/product/5.6/mysql-1。所以找不到相關文件。可以從兩個方面解決。

方法一：在/usr/local/mysql創建鏈接文件

mkdir -p /usr/local/mysql/bin
ln -s /home/mysql/product/5.6/mysql-1/bin/mysqld /usr/local/mysql/bin/mysqld

方法二：將mysqld_safe中的所有/usr/local/mysql目錄改為自己實際的安裝目錄

<pre name="code" class="sql">sed -i 's#/usr/local/mysql#/home/mysql/product/5.6/mysql-1#g' /home/mysql/product/5.6/mysql-1/bin/mysqld_safe

再次啟動成功。