linux mysql 5.7的安装配置教程

1、添加mysq组和用户

groupadd mysql

useradd -r -g mysql mysql

2、解压mysql安装包（mysql-5.7.18-linux-glibc2.5-x86_64.tar）

tar -xvfmysql-5.7.18-linux-glibc2.5-x86_64.tar

tar -zxvf mysql-5.7.18-linux-glibc2.5-x86_64.tar.gz

3、重命名

mv mysql-5.7.18-linux-glibc2.5-x86_64 mysql

4、更改mysql文件夹所属的组合用户

chown -R mysql /usr/local/mysql/

chgrp -R mysql /usr/local/mysql/

5、进入mysql目录 初始化mysql

bin/mysqld --initialize-insecure --user=mysql --basedir=/usr/local/mysql/ --datadir=/usr/local/mysql/data/

6、配置mysql

vi /etc/my.cnf 将附件里的内容复制粘贴进去

附件内容如下：

[mysqld]

sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES 

basedir = /usr/local/mysql
datadir = /usr/local/mysql/data
port = 3306
socket = /tmp/mysql.sock
character-set-server=utf8
skip-grant-tables

back_log = 300
max_connections = 3000
max_connect_errors = 50
table_open_cache = 4096
max_allowed_packet = 32M
#binlog_cache_size = 4M

max_heap_table_size = 128M
read_rnd_buffer_size = 16M
sort_buffer_size = 16M
join_buffer_size = 16M
thread_cache_size = 16
query_cache_size = 128M
query_cache_limit = 4M
ft_min_word_len = 8

thread_stack = 512K
transaction_isolation = REPEATABLE-READ
tmp_table_size = 128M
#log-bin=mysql-bin
long_query_time = 6


server_id=1

innodb_buffer_pool_size = 1G
innodb_thread_concurrency = 16
innodb_log_buffer_size = 16M


innodb_log_file_size = 512M
innodb_log_files_in_group = 3
innodb_max_dirty_pages_pct = 90
innodb_lock_wait_timeout = 120
innodb_file_per_table = on

[mysqldump]
quick

max_allowed_packet = 32M

[mysql]
no-auto-rehash
default-character-set=utf8
safe-updates

[myisamchk]
key_buffer = 16M
sort_buffer_size = 16M
read_buffer = 8M
write_buffer = 8M

[mysqlhotcopy]
interactive-timeout

[mysqld_safe]
open-files-limit = 8192

注意事项：

basedir = /usr/local/mysql
datadir = /usr/local/mysql/data
socket = /tmp/mysql.sock

这几个目录或文件如果不存在，你需要主动创建好，否则会报错。

这个配置文件中有这么一句话skip-grant-tables 是跳过权限和密码验证的；等后面修改完root密码时，需要把这句话注释掉。

7、mysql命令

cp -a /usr/local/mysql/suport-files/mysql.server /etc/init.d/mysql

service mysql start 启动服务

service mysql status 查看mysql状态

service mysql stop 停止服务

service mysql restart 重启服务

8、启动服务 登入系统

./usr/local/mysql/bin/mysql -uroot -p

9、修改root用户密码

//查看所有用户 use mysql; select * from user \G;

UPDATE mysql.user SET authentication_string = PASSWORD('mypassword') WHERE User = 'root' AND Host = 'localhost';

FLUSH PRIVILEGES;

10、退出mysql

exit