Linux安装Mysql启动时mysqld.service: main process exited, code=exited, status=1/FAILURE

用云服务安装mysql后，用systemctl status mysqld后

• 查看 /var/log/mysqld.log后

2021-01-24T09:52:09.517688Z 0 [System] [MY-010116] [Server] /usr/sbin/mysqld (mysqld 8.0.23) starting as process 4170
2021-01-24T09:52:09.630048Z 1 [System] [MY-013576] [InnoDB] InnoDB initialization has started.
2021-01-24T09:52:09.630157Z 1 [ERROR] [MY-012271] [InnoDB] The innodb_system data file 'ibdata1' must be writable
2021-01-24T09:52:09.630203Z 1 [ERROR] [MY-012278] [InnoDB] The innodb_system data file 'ibdata1' must be writable
2021-01-24T09:52:09.630268Z 1 [ERROR] [MY-010334] [Server] Failed to initialize DD Storage Engine
2021-01-24T09:52:09.630410Z 0 [ERROR] [MY-010020] [Server] Data Dictionary initialization failed.
2021-01-24T09:52:09.630494Z 0 [ERROR] [MY-010119] [Server] Aborting
2021-01-24T09:52:09.631375Z 0 [System] [MY-010910] [Server] /usr/sbin/mysqld: Shutdown complete (mysqld 8.0.23)  MySQL Community Server - GPL.

• 其中The innodb_system data file 'ibdata1' must be writable 告诉我们 'ibdata1'必须可写
• 修改对应文件权限为可读可写可执行权限

chmod -R 777 /var/lib/mysql

• 不是yum安装的话,可以找到

• find / -name ibdata1
  

• 修改完之后再次启动mysql，即可成功