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官方文档：
https://dev.mysql.com/doc/refman/5.7/en/binary-installation.html
安装步骤：
1、下载并解压下载的二进制包
tar -xvf mysql-5.7.20-linux-glibc2.12-x86_64.tar
tar xvf mysql-5.7.20-linux-glibc2.12-x86_64.tar.gz
2、移动解压包到/usr/local 下，并改名为mysql5.7
[root@credithwsx mysql]# mv mysql-5.7.20-linux-glibc2.12-x86_64 /usr/local/mysql5.7
3、安装依赖包（MySQL依赖于libaio 库 和numactl）
yum install libaio
yum install numactl
4、要安装和使用MySQL二进制发行版，命令序列如下所示：
shell> groupadd mysql
shell> useradd -r -g mysql -s /bin/false mysql shell> cd /usr/local shell> tar zxvf /path/to/mysql-VERSION-OS.tar.gz
shell> ln -s full-path-to-mysql-VERSION-OS mysql
shell> cd mysql shell> mkdir mysql-files shell> chown mysql:mysql mysql-files
shell> chmod 750 mysql-files
shell> bin/mysqld --initialize --user=mysql shell> bin/mysql_ssl_rsa_setup
shell> bin/mysqld_safe --user=mysql &
# Next command is optional
shell> cp support-files/mysql.server /etc/init.d/mysql.server
5、初始化数据库与密码
[root@credithwsx mysql5.7]# bin/mysqld --initialize --user=mysql
2017-12-19T09:05:32.278790Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2017-12-19T09:05:32.279930Z 0 [ERROR] Can't find error-message file '/usr/local/mysql/share/errmsg.sys'. Check error-message file location and 'lc-messages-dir' configuration directive.
2017-12-19T09:05:36.374681Z 0 [Warning] InnoDB: New log files created, LSN=45790
2017-12-19T09:05:37.028680Z 0 [Warning] InnoDB: Creating foreign key constraint system tables.
2017-12-19T09:05:37.182429Z 0 [Warning] No existing UUID has been found, so we assume that this is the first time that this server has been started. Generating a new UUID: c73d1bdd-e49b-11e7-be13-525400e66d7c.
2017-12-19T09:05:37.200319Z 0 [Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened.
2017-12-19T09:05:37.204842Z 1 [Note] A temporary password is generated for root@localhost: =cD1U#t
6、修改my.cnf 配置文件，增加basedir和datadir
vim /etc/my.cnf
basedir=/usr/local/mysql5.7/
datadir=/usr/local/mysql5.7/data
7、添加软链接，直接运行mysql就可以打开 mysql命令
[root@credithwsx mysql5.7]# ln -s /var/lib/mysql/mysql.sock /tmp/
[root@credithwsx mysql5.7]# ln -s $(pwd)/bin/mysql /usr/bin
报错：ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)
[root@credithwsx mysql5.7]# ps -aux |grep mysql
Warning: bad syntax, perhaps a bogus '-'? See /usr/share/doc/procps-3.2.8/FAQ
root 1830 0.0 0.0 145024 1620 pts/3 S 15:29 0:00 su - mysql
mysql 1831 0.0 0.0 108324 1868 pts/3 S+ 15:29 0:00 -bash
root 1880 0.0 0.0 102104 4044 ? Ss 15:30 0:00 sshd: mysql [priv]
mysql 1885 0.0 0.0 102104 1896 ? S 15:30 0:00 sshd: mysql@pts/5
mysql 1886 0.0 0.0 108324 1896 pts/5 Ss 15:30 0:00 -bash
root 1987 0.0 0.0 145024 1616 pts/2 S 15:55 0:00 su - mysql
mysql 1988 0.0 0.0 108328 1872 pts/2 S 15:55 0:00 -bash
root 2751 0.0 0.0 106220 1580 pts/6 S 17:08 0:00 /bin/sh /usr/local/mysql5.7//bin/mysqld_safe --datadir=/var/lib/mysql --pid-file=/var/lib/mysql/credithwsx.pid
mysql 2915 0.2 2.3 1243240 189952 pts/6 Sl 17:08 0:00 /usr/local/mysql5.7/bin/mysqld --basedir=/usr/local/mysql5.7 --datadir=/var/lib/mysql --plugin-dir=/usr/local/mysql5.7/lib/plugin --user=mysql --log-error=/var/log/mysqld.log --pid-file=/var/lib/mysql/credithwsx.pid --socket=/var/lib/mysql/mysql.sock
root 2952 0.0 0.0 103332 892 pts/6 S+ 17:11 0:00 grep mysql
8、使用密码连接不了mysql ？
解决方法： 在/etc/my.cnf 中添加 skip-grant-tables 跳过校验。（#号是注释）
进入mysql，修改root帐号的密码，在重新登录就好。
mysql -u root -p
use mysql；
ALTER USER 'root'@'localhost' IDENTIFIED BY 'ICKLjPVmClvv1XtuCNoXXXXXXXXX';
如果上述操作不可行，视情况使用：
update user set authentication_string=PASSWORD('newpass') where User='root';
ALTER USER 'root'@'localhost' IDENTIFIED BY 'ICKLjPVmClvv1XtuCNoXXXXXXXX';
