亲测linux系统安装mysql5.7.22

1.下载mysql

2.下载完后上传到linux下的mysql目录下解压，执行命令：tar mysql-5.6.17-linux-glibc2.5-i686.tar.gz

建议：最好安装到/usr/local/mysql目录中，安装到别的目录可能会出现很多问题

3.重命名

rm -rf mysql-5.7.22-linux-glibc2.12-x86_64.tar.gz

mv mysql-5.7.22-linux-glibc2.12-x86_64/ mysql

4.卸载系统自带mysql

查看：rpm -qa|grep mysql

卸载：rpm -e -nodeps softfullname

没安装mysql直接下一步

5.创建用户组和用户

创建用户组：groupadd mysql

创建用户：useradd -r -g mysql mysql

为了安全性，给mysql数据库创建专有用户，该用户只能访问mysql目录，不能访问系统其它目录

另外不建议直接用root初始化mysql，否则连接mysql时会报错：[ERROR] Fatal error: Please read "Security" section of the manual to find out how to run mysqld as root!

6.给mysql用户指定专有用户和用户组

首先创建data目录

cd /usr/local/mysql

mkdir data

指定用户和用户组：

cd /usr/local

chown -R mysql mysql/

chgrp -R mysql mysql/

-R包含目录下所有和目录和文件

7、初始化mysql

cd /usr/local/mysql/bin

./mysqld --initialize --user=mysql --basedir=/usr/local/mysql/ --datadir=/usr/local/mysql/data/ --lc_messages_dir=/usr/local/mysql/share --lc_messages=en_US

记住生成的临时密码

如果忘记密码或者想重新初始化，可以先将mysql/data目录中文件删除，然后再执行初始化命令

8、配置my.cnf

vi /etc/my.cnf

精简版：只要这两行 其余的注释掉

[mysqld]
basedir=/usr/local/mysql/
datadir=/usr/local/mysql/data/

可选版：

# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/5.7/en/server-configuration-defaults.html
# *** DO NOT EDIT THIS FILE. It's a template which will be copied to the
# *** default location during install, and will be replaced if you
# *** upgrade to a newer version of MySQL.

[mysqld]
# sql_mode = NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES

# 一般配置选项
basedir = /usr/local/mysql/
datadir = /usr/local/mysql/data
port = 3306
character-set-server = utf8
explicit_defaults_for_timestamp = true
# socket = /var/run/mysqld/mysqld.sock

#下面是可选项，要不要都行，如果出现启动错误，则全部注释掉，保留最基本的配置选项，然后尝试添加某些配置项后启动，检测配置项是否有误
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

[client]
/bin/bash: Q: command not found

9、启动

cd /usr/local/mysql/bin

启动：./mysqld_safe --user=mysql &

10、设为开机启动

cd /usr/local/mysql/support-files/

cp mysql.server /etc/init.d/mysql

vi /etc/init.d/mysql

将mysql目录填上：

basedir=/usr/local/mysql/

datadir=/usr/local/mysql/data/

授权：chmod +x /etc/init.d/mysql

设为开机启动：chkconfig --add mysql

11、service启动

重启服务：service mysql restart

停止服务：service mysql stop

启动服务：service mysql start

查看服务：service mysql status

12、登录mysql修改密码授权远程登录

cd /usr/local/mysql/bin

登录：./mysql -u root -p    输入临时密码

修改密码：set password=password("root");

登录授权：grant all privileges on *.* to'root' @'%' identified by 'root';

授权生效：flush privileges;

可使用navicat或sqlyog等工具进行登录，注意关闭防火墙或开放3306端口