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
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
启动时报错：
出现问题原因：
有可能是 my.cnf 配置文件中设置了 [mysqld] 的参数 socket ，而没有设置[client]的参数socket
