/var/run/mysqld/的屬主和屬組屬於root,mysql並不能在其中創建文件
手動的新建目錄
[root@iz2zei43l28m7vcezzzyyjz apache-tomcat-9.0.0]# mkdir -p /var/run/mysqld/
[root@iz2zei43l28m7vcezzzyyjz apache-tomcat-9.0.0]# ls -ld /var/run/mysqld/ drwxr-xr-x 2 root root 40 May 6 17:58 /var/run/mysqld/ [root@iz2zei43l28m7vcezzzyyjz apache-tomcat-9.0.0]# chown mysql.mysql /var/run/mysqld/ [root@iz2zei43l28m7vcezzzyyjz apache-tomcat-9.0.0]# /etc/init.d/mysqld start Starting mysqld (via systemctl): [ OK ]