今天在配置lnmp（Linux+nginx+mysql+php）的时候，环境都配好了，在访问网站的时候出现错误：
发现在目录/var/lib/mysql下并没有mysql.sock文件，使用find命令找到mysql.sock的位置：
find / -name mysql.sock
找到/tmp下有mysql.sock文件，然后将/tmp/mysql.sock文件映射到/val/lib/mysql/目录下：
ln -s /tmp/mysql.sock /val/lib/mysql/mysql.sock
重启mysql
service mysql restart service mysqld restart
如果问题仍没有解决，试着修改mysql下my.cnf文件的sock目录和php.ini的pdo_mysql.default_socket、mysql.default_socket和mysqli.default_socket的路径
参考：https://blog.csdn.net/hjf161105/article/details/78850658
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