注意在ubuntu上mysqld –initialize ，要配置apparmor，可以通过修改参数文件 vim /etc/apparmor.d/usr.sbin.mysqld， 也可以像我一样直接禁用mysql的apparmor profile。
否则会出现 Can’t create directory (Errcode: 13 – Permission denied) 错误
su - root systemctl stop mysql mkdir -p /d01/mysql #这里重新初始化的目标目录是/d01/mysql chown mysql:mysql /d01 chown mysql:mysql /d01/mysql #一些权限设置 mkdir /var/run/mysqld chown mysql:mysql /var/run/mysqld chown mysql:mysql /var/log/mysql chown mysql:mysql /var/log/mysql/* 修改 /etc/mysql/mysql.conf.d/mysqld.cnf datadir = /d01/mysql 下面 禁用mysql的apparmor profile aa-status |grep mysql ln -s /etc/apparmor.d/usr.sbin.mysqld /etc/apparmor.d/disable/ apparmor_parser -R /etc/apparmor.d/usr.sbin.mysqld 重启 apparmor systemctl restart apparmor aa-status |grep mysql //aa-status |grep mysql 应当无结果 mysqld --initialize --user=mysql root@vultr:~# grep password /var/log/mysql/error.log 2020-04-27T07:39:28.126296Z 1 [Warning] root@localhost is created with an empty password ! Please consider switching off the --initialize-insecure option. 2020-04-27T07:39:32.229124Z 0 [Note] Shutting down plugin 'sha256_password' 2020-04-27T07:39:32.229128Z 0 [Note] Shutting down plugin 'mysql_native_password' 2020-04-27T07:39:44.435551Z 0 [Note] Shutting down plugin 'sha256_password' 2020-04-27T07:39:44.435556Z 0 [Note] Shutting down plugin 'mysql_native_password' 2020-04-27T07:41:01.360902Z 1 [Note] A temporary password is generated for root@localhost: T#jTiKh+d9Og 临时密码T#jTiKh+d9Og systemctl start mysql mysql -uroot -pT#jTiKh+d9Og
