centos7.9 安装配置mysql5.6

一、解压安装包：

# tar xf  MySQL-5.6.23-1.el6.x86_64.rpm-bundle.tar

解出来的文件：

1、MySQL-embedded-5.6.23-1.el6.x86_64.rpm

2、MySQL-devel-5.6.23-1.el6.x86_64.rpm 

3、MySQL-shared-5.6.23-1.el6.x86_64.rpm

4、MySQL-shared-compat-5.6.23-1.el6.x86_64.rpm

5、MySQL-test-5.6.23-1.el6.x86_64.rpm

6、MySQL-client-5.6.23-1.el6.x86_64.rpm

7、MySQL-server-5.6.23-1.el6.x86_64.rpm

二、检查是否安装过mysql：

# rpm -qa |grep mysql

卸载原来的安装包

三、安装mysql包：

# rpm -ivh MySQL-embedded-5.6.23-1.el6.x86_64.rpm –nodeps –force

# rpm -ivh MySQL-devel-5.6.23-1.el6.x86_64.rpm  –nodeps –force

# rpm -ivh MySQL-shared-5.6.23-1.el6.x86_64.rpm –nodeps –force

# rpm -ivh MySQL-shared-compat-5.6.23-1.el6.x86_64.rpm –nodeps –force

# rpm -ivh MySQL-client-5.6.23-1.el6.x86_64.rpm –nodeps –force

# rpm -ivh MySQL-server-5.6.23-1.el6.x86_64.rpm –nodeps –force

如果出现

FATAL ERROR: please install the following Perl modules before executing /usr/bin/mysql_install_db:
Data::Dumper

原因：
　　缺少依赖包autoconf
解决办法：
　　通过yum安装autoconf
# yum -y install autoconf

然后再执行安装：

# rpm -ivh MySQL-server-5.6.23-1.el6.x86_64.rpm –nodeps –force

默认情况下，mysql的dat目录为：/var/lib/mysql  配置文件位置为：/etc/my.cnf，默认的dat目录不要删除，可在配置文件里修改dat目录。

四、编辑my.cnf 配置文件内容如下：

[mysqld]

#根据情况修改
datadir=/web/mysqldat/mysql

#默认勿改
socket=/var/lib/mysql/mysql.sock

symbolic-links=0

[mysqld_safe]
log-error=/var/log/mariadb/mariadb.log
pid-file=/var/run/mariadb/mariadb.pid

!includedir /etc/my.cnf.d

character-set-server=utf8
default-storage-engine=INNODB
port=3306
group_concat_max_len=50000000
server_id = 1
log-error=”UF10162179.err”
slow_query_log = 1
slow_query_log_file=”UF10162179-slow.log”
long_query_time = 1
log-queries-not-using-indexes
max_connections = 1024
back_log = 128
wait_timeout = 60
interactive_timeout = 7200
key_buffer_size = 512M
query_cache_size = 512M
query_cache_type = 1
query_cache_limit = 50M
max_connect_errors = 20
sort_buffer_size = 2M
max_allowed_packet = 32M
join_buffer_size = 2M
thread_cache_size = 200
innodb_buffer_pool_size = 2048M
innodb_flush_log_at_trx_commit = 1
innodb_log_buffer_size = 128M
innodb_log_file_size = 128M
innodb_log_files_in_group = 3
binlog_cache_size = 2M
max_binlog_cache_size = 8M
max_binlog_size = 512M
expire_logs_days = 7
read_buffer_size = 1M
read_rnd_buffer_size = 16M
bulk_insert_buffer_size = 64M
sql-mode=”STRICT_TRANS_TABLES,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION”

五、初始化数据库

# cd /bin

# ./mysql_install_db –user=mysql

如果出现错误：

Installing MySQL system tables…/usr/sbin/mysqld: error while loading shared libraries: libaio.so.1: cannot open shared object file: No such file or directory

缺少依赖包，执行：

# yum install -y libaio

安装完依赖包再次执行：

# ./mysql_install_db –user=mysql

六、启动mysql

# service mysql start

 

登录mysql

 # mysql -uroot -p

如果提示需要密码，可以查看初始密码：

# cat /root/.mysql_secret

登录后修改密码：

mysql> SET PASSWORD = PASSWORD(‘111111’);

mysql> flush privileges;

修改能远程登录：

mysql> use mysql;

mysql> GRANT ALL PRIVILEGES ON *.* TO ‘root’@’%’ IDENTIFIED BY ‘111111’ WITH GRANT OPTION;