报错版本：mysql-5.7.35

1、报错完整提示信息；

[root@localhost bin]# 2022-11-15T04:04:43.122905Z mysqld_safe Logging to '/var/log/mysql.log'.

2022-11-15T04:04:43.130761Z mysqld_safe Directory '/tmp/mysql' for UNIX socket file don't exists.

2、原因：

tmp目录下没有mysql目录或存在该目录但没有写入的权限

3、解决：

新建目录，并赋权

[root@localhost bin]# mkdir /tmp/mysql

[root@localhost bin]# chmod 777 /tmp/mysql

然后重启mysql

[root@localhost bin]# ./mysqld_safe &

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