报错！！！MySQL在安装过程中的报错

一、报错问题

[root@zs data]# /usr/local/mysql/bin/mysqld_safe --defaults-file=/etc/my.cnf &[1] 3758 
[root@zs data]# 170720 14:41:24 mysqld_safe Logging to '/data/mysql/error.log'. 
201207 14:41:24 mysqld_safe Starting mysqld daemon with databases from /data/mysql201207  
14:41:25 mysqld_safe mysqld from pid file /data/mysql/node4.pid ended 
201207 14:41:24 mysqld_safe Starting mysqld daemon with databases from /data/mysql2020-12-07  
14:41:25 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. 
Please use --explicit_defaults_for_timestamp server option  
(see documentation for more details)./usr/local/mysql/bin/mysqld:  
File '/data/mysql/mysql-bin.index' not found (Errcode: 13 - Permission denied) 
2020-12-07 14:41:25 4388 [ERROR] Aborting 

二、解决思路

• 遇到这样的报错信息，我们要学会时时去关注错误日志 error log 里面的内容。看见了关键的报错点Permission denied，证明当前 MySQL 数据库的数据目录没有权限。

三、解决方法

[root@zs data]# chown mysql:mysql -R mysql 
[root@zs data]# /usr/local/mysql/bin/mysqld_safe --defaults-file=/etc/my.cnf & 
[1] 4402 
[root@zs data]# 170720 14:45:56 mysqld_safe Logging to '/data/mysql/error.log'. 
201207 14:45:56 mysqld_safe Starting mysqld daemon with databases from /data/mysql 

启动成功。

四、如何避免这类问题

• 如何避免这类问题，个人建议在安装 MySQL 初始化的时候，一定加上–user=mysql，这样就可以避免权限问题。

./mysql_install_db --basedir=/usr/local/mysql/ --datadir=/data/mysql/ --defaults-file=/etc/my.cnf --user=mysql