CentOS6.5安装MySQL5.7详细教程(本人6.3也行)
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本文参考http://www.cnblogs.com/lzj0218/p/5724446.html
主要参考博文:
https://segmentfault.com/a/1190000003049498
http://www.th7.cn/db/mysql/201601/175073.shtml
1.检测系统是否已经安装过mysql或其依赖,若已装过要先将其删除,否则第4步使用yum安装时会报错:
1 # yum list installed | grep mysql 2 mysql-libs.i686 5.1.71-1.el6 @anaconda-CentOS-201311271240.i386/6.5 3 # yum -y remove mysql-libs.i686
2.从mysql的官网下载mysql57-community-release-el6-5.noarch.rpm(注意这里的el6-5即适配RHEL6.5的版本,如果下载了其它版本后面的安装过程中可能会报错):
wget dev.mysql.com/get/mysql-community-release-el6-5.noarch.rpm (本文备份https://files.cnblogs.com/files/weiyiyong/mysql-community-release-el6-5.noarch.rar)
3.安装第一步下载的rpm文件:
yum install mysql-community-release-el6-5.noarch.rpm
安装成功后,我们可以看到/etc/yum.repos.d/目录下增加了以下两个文件
1 # ls /etc/yum.repos.d 2 mysql-community-source.repo 3 mysql-community.repo
查看mysql57的安装源是否可用,如不可用请自行修改配置文件(/etc/yum.repos.d/mysql-community.repo)使mysql57下面的enable=1
若有mysql其它版本的安装源可用,也请自行修改配置文件使其enable=0
1 # yum repolist enabled | grep mysql 2 mysql-connectors-community MySQL Connectors Community 13 3 mysql-tools-community MySQL Tools Community 18 4 mysql57-community-dmr MySQL 5.7 Community Server Development Milesto 65
4.使用yum安装mysql:
yum install mysql-community-server
5.启动mysql服务:(先运行这个,不然出现ERROR 2002 (HY000): Can\'t connect to local MySQL server through socket \'/var/lib/mysql/mysql.sock\' (2))
service mysqld start
查看root密码:
1 # grep "password" /var/log/mysqld.log 2 2016-08-10T15:03:02.210317Z 1 [Note] A temporary password is generated for root@localhost: AYB(&-3Cz-rW
现在必须立刻修改密码,不然会报错:(http://www.cnblogs.com/weiyiyong/p/7636333.html)
ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.
修改密码(如果在此步报错ERROR 1819,请向下翻查看原因及解决方法):
mysql> SET PASSWORD FOR \'root\'@\'localhost\' = PASSWORD(\'newpass\');
6.查看mysqld是否开机自启动,并设置为开机自启动:
1 chkconfig --list | grep mysqld 2 chkconfig mysqld on
7.修改字符集为UTF-8:
vim /etc/my.cnf
在[mysqld]部分添加:
character-set-server=utf8
在文件末尾新增[client]段,并在[client]段添加:
default-character-set=utf8
修改好之后重启mysqld服务:
service mysqld restart
查看修改结果:
mysql> show variables like "%character%";(出现需要密码时重新重置密码,坑逼 使用SET PASSWORD = PASSWORD(\'yong123456\');) +--------------------------+----------------------------+ | Variable_name | Value | +--------------------------+----------------------------+ | character_set_client | utf8 | | character_set_connection | utf8 | | character_set_database | utf8 | | character_set_filesystem | binary | | character_set_results | utf8 | | character_set_server | utf8 | | character_set_system | utf8 | | character_sets_dir | /usr/share/mysql/charsets/ | +--------------------------+----------------------------+ 8 rows in set (0.00 sec)
注:在修改密码步骤,若设置的密码为简单密码,可能会出现如下错误:
ERROR 1819 (HY000): Your password does not satisfy the current policy requirements
这一错误其实与validate_password_policy值的设置有关:
validate_password_policy值默认为1,即MEDIUM,所以刚开始设置的密码必须符合长度要求,且必须含有数字,小写或大写字母,特殊字符
如果我们只是做为测试用而不需要如此复杂的密码,可使用如下方式修改validate_password_policy值
mysql> set global validate_password_policy=0; Query OK, 0 rows affected (0.00 sec)
这样,对密码要求就只有长度了,而密码的最小长度由validate_password_length值决定
validate_password_length参数默认为8,它有最小值的限制,最小值为:
validate_password_number_count+ validate_password_special_char_count+ (2 * validate_password_mixed_case_count)
其中,validate_password_number_count指定了密码中数字的长度,validate_password_special_char_count指定了密码中特殊字符的长度,validate_password_mixed_case_count指定了密码中大小字母的长度。这些参数的默认值均为1,所以validate_password_length最小值为4,如果显性指定validate_password_length的值小于4,尽管不会报错,但validate_password_length的值将设为4
设置validate_password_length的值:
mysql> set global validate_password_length=4; Query OK, 0 rows affected (0.00 sec)
如果修改了validate_password_number_count,validate_password_special_char_count,validate_password_mixed_case_count中任何一个值,则validate_password_length将进行动态修改。
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