转载自：https://www.cnblogs.com/leffss/p/8512773.html
一．安装前准备
安装采用二进制包方式，软件包5.7.19版本下载地址：https://dev.mysql.com/downloads/mysql/
选择MYSQL Community Server版本再根据操作系统和版本选择性下载
二．解压安装
1.创建mysql用户
[root@server ~]# useradd -s /sbin/nologin mysql
2.解压安装
[root@server ~]# tar xvf mysql-5.7.19.tar.gz
[root@server ~]# /bin/mv –f mysql-5.7.19 /usr/local/mysql
[root@server ~]# mkdir /data/mysql_data
[root@server ~]# chown mysql. -R /usr/local/mysql /data/mysql_data
[root@server ~]# cp /usr/loca/mysql/support-files/mysql.server /etc/init.d/mysqld
[root@server ~]# chmod a+x /etc/init.d/mysqld
[root@server ~]# chkconfig --add mysqld
[root@server ~]# chkconfig mysqld on
[root@server ~]# echo 'export PATH=$PATH:/usr/local/mysql/bin' >> /etc/profile
3.初始化mysql
/usr/local/mysql/bin/mysqld --initialize --basedir=/usr/local/mysql --datadir=/data/mysql_data --user=mysql
初始化成功后会得到一个随机的初始化root密码显示在控制台，如果控制台没有显示，请在/var/log/message日志中查找，保存待用
4.设置mysql配置文件
[root@server ~]# vi /etc/my.cnf
[client]
port=3306
default-character-set=utf8
[mysqld]
datadir=/data/mysql_data
user=mysql
port=3306
character-set-server='utf8'
collation-server='utf8_general_ci'
skip-external-locking
key_buffer_size = 16M
wait_timeout=2880000
interactive_timeout = 2880000
max_allowed_packet = 1024M
table_open_cache = 64
sort_buffer_size = 512K
net_buffer_length = 8K
read_buffer_size = 256K
read_rnd_buffer_size = 512K
myisam_sort_buffer_size = 8M
max_connections=1024
max_connect_errors=20000
#innodb_additional_mem_pool_size=4M
innodb_flush_log_at_trx_commit=2
innodb_log_buffer_size=256M
innodb_buffer_pool_size=256M
innodb_autoextend_increment=128
innodb_log_file_size=256M
innodb_thread_concurrency=8
innodb_flush_method=O_DIRECT
thread_cache_size=8
symbolic-links=0
[mysqld_safe]
log-error=/var/log/mysqld.log
注：此配置仅供参考，不同主机根据主机配置以及需求做配置
三．启动mysql
1.启动
[root@server ~]# service mysqld start
2.登陆mysql配置root密码
使用初始化时随机分配的root密码登陆，并修改root密码，如不修改，无法做任何数据操作。
[root@server ~]# mysql –uroot –p
mysql > SET PASSWORD = PASSWORD('123456'); #设置新root密码
mysql > ALTER USER 'root'@'localhost' PASSWORD EXPIRE NEVER;
mysql > flush privileges;
至此，mysql安装完成
