安装mysql5.6报错问题统计点

报错1（su进入mysql属组时报错）：

[root@dbserver ~]# su - mysql

Last login: Thu Aug 31 17:20:03 CST 2017 on pts/1

su: warning: cannot change directory to /home/mysql: No such file or directory

-bash-4.2$ exit

解决方法：

[root@dbserver ~]# cd /home

[root@dbserver home]# ls

 xiniu

[root@dbserver home]# mkdir /home/mysql

[root@dbserver home]# chmod 755 /home/mysql

[root@dbserver home]# ls

mysql   xiniu

[root@dbserver home]# cp -a /etc/skel/. /home/mysql/

[root@dbserver home]# su - mysql

Last login: Thu Aug 31 17:20:58 CST 2017 on pts/1

[mysql@dbserver ~]$ id

uid=987(mysql) gid=1003(mysql) 组=1003(mysql) 环境=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023

报错2(启动报错)：

[root@localhost mysql]# /etc/init.d/mysql start

Starting MySQL. ERROR! The server quit without updating PID file (/usr/local/mysql/data/localhost.localdomain.pid).

解决方法：

#rm -rf /usr/local/mysql/data

# chown -R mysql.mysql .

# cd  /usr/local/mysql

# scripts/mysql_install_db

# /usr/local/mysql/bin/mysqld_safe --user=root &

# ls    /usr/local/mysql/data/

# /etc/init.d/mysqld start
Starting MySQL SUCCESS!   ##启动成功

 

报错3(启动报错)：

/etc/init.d/mysql: line 256: my_print_defaults: command not found

/etc/init.d/mysql: line 276: cd: /usr/local/mysql: No such file or directory

Starting MySQL ERROR! Couldn't find MySQL server (/usr/local/mysql/bin/mysqld_safe)

解决办法：
编辑/etc/my.cnf 文件，因为缺少basedir 和 datadir 两个路径，在 [mysqld] 添加上即可
#vim /etc/my.cnf
[mysqld]
...........
...........
basedir=/usr/local/mysql          ##修改成自己安装路径
datadir=/usr/local/mysql/data   ##修改成自己安装路径

保存退出，然后重新启动就可以.

[root@localhost mysql]# vim /etc/my.cnf

[root@localhost mysql]# service mysql start

Starting MySQL........................................ SUCCESS!