linux系统版本： CentOS 7.7 64位
安装源文件版本：mysql-5.7.21-linux-glibc2.12-x86_64.tar.gz
mysql安装位置：/usr/local/mysql
数据库文件数据位置：/usr/local/data/mysql
1、在/usr/local/目录下创建文件夹/data/mysql
2、上传mysql-5.7.21-linux-glibc2.12-x86_64.tar.gz文件到/usr/local/下，解压mysql-5.7.21-linux-glibc2.12-x86_64.tar.gz
tar -zxvf mysql-5.7.21-linux-glibc2.12-x86_64.tar.gz
3、更改解压缩后的文件夹名称
mv /usr/local/mysql-5.7.21-linux-glibc2.12-x86_64/ /usr/local/mysql
4、创建mysql用户组和mysql用户
groupadd mysql
useradd -r -g mysql mysql
5、关联myql用户到mysql用户组中
chown -R mysql:mysql /usr/local/mysql/
chown -R mysql:mysql /usr/local/data/mysql/
chown -R mysql /usr/local/mysql/
chown -R mysql /usr/local/data/mysql
6、更改mysql安装文件夹mysql/的权限
chmod -R 755 /usr/local/mysql/
7、安装libaio依赖包
查询是否暗转libaio依赖包
yum search libaio
如果没安装，可以用下面命令安装
yum install libaio
8、初始化mysql命令
cd /usr/local/mysql/bin
./mysqld --user=mysql --basedir=/usr/local/mysql --datadir=/usr/local/data/mysql --initialize
在执行上面命令时特别要注意一行内容
[Note] A temporary password is generated for root@localhost: o*s#gqh)F4Ck
root@localhost: 后面跟的是mysql数据库登录的临时密码，各人安装生成的临时密码不一样
如果初始化时报错如下：
error while loading shared libraries: libnuma.so.1: cannot open shared objec
是因为libnuma安装的是32位，我们这里需要64位的，执行下面语句就可以解决
#yum install numactl.x86_64
执行完后重新初始化mysql命令
basedir=/usr/local/mysql
datadir=/usr/local/data/mysql
保存退出
10、复制启动脚本mysql.server到etc/init.d/mysqld，并改变权限
11、修改my.cnf文件，指定端口3306
#vi /etc/my.cnf
将下面内容复制替换当前的my.cnf文件中的内容
[client]
no-beep
socket =/usr/local/mysql/mysql.sock
# pipe
# socket=0.0
port=3306
[mysql]
default-character-set=utf8
[mysqld]
basedir=/usr/local/mysql
datadir=/usr/local/data/mysql
port=3306
pid-file=/usr/local/mysql/mysqld.pid
#skip-grant-tables
skip-name-resolve
socket = /usr/local/mysql/mysql.sock
character-set-server=utf8
default-storage-engine=INNODB
explicit_defaults_for_timestamp = true
# Server Id.
server-id=1
max_connections=2000
query_cache_size=0
table_open_cache=2000
tmp_table_size=246M
thread_cache_size=300
#限定用于每个数据库线程的栈大小。默认设置足以满足大多数应用
thread_stack = 192k
key_buffer_size=512M
read_buffer_size=4M
read_rnd_buffer_size=32M
innodb_data_home_dir=/usr/local/data/mysql
innodb_flush_log_at_trx_commit=0
innodb_log_buffer_size=16M
innodb_buffer_pool_size=256M
innodb_log_file_size=128M
innodb_thread_concurrency=128
innodb_autoextend_increment=1000
innodb_buffer_pool_instances=8
innodb_concurrency_tickets=5000
innodb_old_blocks_time=1000
innodb_open_files=300
innodb_stats_on_metadata=0
innodb_file_per_table=1
innodb_checksum_algorithm=0
back_log=80
flush_time=0
join_buffer_size=128M
max_allowed_packet=1024M
max_connect_errors=2000
open_files_limit=4161
query_cache_type=0
sort_buffer_size=32M
table_definition_cache=1400
binlog_row_event_max_size=8K
sync_master_info=10000
sync_relay_log=10000
sync_relay_log_info=10000
#批量插入数据缓存大小，可以有效提高插入效率，默认为8M
bulk_insert_buffer_size = 64M
interactive_timeout = 120
wait_timeout = 120
log-bin-trust-function-creators=1
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
#
# include all files from the config directory
#
!includedir /etc/my.cnf.d
保存退出
12、启动mysql
/etc/init.d/mysqld start
13、登录mysql
/usr/local/mysql/bin/mysql -u root –p
14、输入临时密码。临时密码就是第8条root@localhost:后面的内容
15、修改mysql的登录密码，并所有权限给root
mysql>set password=password('root');
mysql>grant all privileges on *.* to root@'%' identified by 'root';
mysql>flush privileges;
16、此时mysql的登录名root，登录密码root，登录root用户并创建测试数据库mytestdatabase。
/usr/local/mysql/bin/mysql -u root –p
输入密码
mysql>create database mytestdatabase；
17、 创建用户qiaozhong，可以从任意主机登录，密码123。
mysql>create user qiaozhong identified by '123'；
18、将测试数据库mytestdatabase所有表的所有权限赋给qiaozhong用户
mysql>grant all privileges on mytestdatabase.* to 'qiaozhong' identified by '123';
19、使用Navicat用qiaozhong用户登录，密码123，端口3306。