linux安装mysql

1、linux 安装MySql 5.7.20 1、下载文件（https://pan.baidu.com/s/1c1VBcHy）放到目录：/usr/local/

2、解压

　　cd /usr/local/
　　tar -zxvf mysql-5.7.20-linux-glibc2.12-x86_64.tar.gz.tar.gz
　　mkdir mysql
　　mv mysql-5.7.20-linux-glibc2.12-x86_64/* mysql

　　groupadd mysql  //创建用户组mysql

　　useradd -r -g mysql mysql //-r参数表示mysql用户是系统用户，不可用于登录系统，创建用户mysql并将其添加到用户组mysql中

　　chown -R mysql mysql/

　　chgrp -R mysql mysql/

3、创建配置文件

　vim /etc/my.cnf 　内容如下，可以添加你需要的配置：

[client]
port = 3306
socket = /tmp/mysql.sock

[mysqld]
character_set_server=utf8
init_connect=\'SET NAMES utf8\'
 dir=/usr/local/mysql
datadir=/usr/local/mysql/data
socket=/tmp/mysql.sock
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
#不区分大小写
lower_case_table_names = 1
sql_mode=STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION
max_connections=5000
default-time_zone = \'+8:00\'

4、初始化数据库

#先安装一下这个东东，要不然初始化有可能会报错

yum install libaio

#手动编辑一下日志文件，什么也不用写，直接保存退出
cd /var/log/

vim mysqld.log
：wq

chmod 777 mysqld.log
chown mysql:mysql mysqld.log

/usr/local/mysql/bin/mysqld --initialize --user=mysql -- dir=/usr/local/mysql --datadir=/usr/local/mysql/data --lc_messages_dir=/usr/local/mysql/share --lc_messages=en_US

5、查看初始密码

cat /var/log/mysqld.log
##执行后关注最后一点：root@localhost: 这里就是初始密码

 6、启动服务，进入mysql，修改初始密码，运行远程连接（这里执行完后，密码将变成：123456）

cd /var/run/
mkdir mysqld
chmod 777 mysqld
cd mysqld
vim mysqld.pid

chmod 777 mysqld.pid
chown mysql:mysql mysqld.pid 

 /usr/local/mysql/support-files/mysql.server start
 /usr/local/mysql/bin/mysql -uroot -p你在上面看到的初始密码

// 以下是进入数据库之后的sql语句

 use mysql;
 UPDATE `mysql`.`user` SET `Host`=\'%\', `User`=\'root\', `Select_priv`=\'Y\', `Insert_priv`=\'Y\', `Update_priv`=\'Y\', `Delete_priv`=\'Y\', `Create_priv`=\'Y\', `Drop_priv`=\'Y\', `Reload_priv`=\'Y\', `Shutdown_priv`=\'Y\', `Process_priv`=\'Y\', `File_priv`=\'Y\', `Grant_priv`=\'Y\', `References_priv`=\'Y\', `Index_priv`=\'Y\', `Alter_priv`=\'Y\', `Show_db_priv`=\'Y\', `Super_priv`=\'Y\', `Create_tmp_table_priv`=\'Y\', `Lock_tables_priv`=\'Y\', `Execute_priv`=\'Y\', `Repl_slave_priv`=\'Y\', `Repl_client_priv`=\'Y\', `Create_view_priv`=\'Y\', `Show_view_priv`=\'Y\', `Create_routine_priv`=\'Y\', `Alter_routine_priv`=\'Y\', `Create_user_priv`=\'Y\', `Event_priv`=\'Y\', `Trigger_priv`=\'Y\', `Create_tablespace_priv`=\'Y\', `ssl_type`=\'\', `ssl_cipher`=\'\', `x509_issuer`=\'\', `x509_subject`=\'\', `max_questions`=\'0\', `max_updates`=\'0\', `max_connections`=\'0\', `max_user_connections`=\'0\', `plugin`=\'mysql_native_password\', `authentication_string`=\'*6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9\', `password_expired`=\'N\', `password_last_changed`=\'2017-11-20 12:41:07\', `password_lifetime`=NULL, `account_locked`=\'N\' WHERE  (`User`=\'root\');

 flush privileges;

7、开机自启

cd /usr/local/mysql/support-files
cp mysql.server /etc/init.d/mysqld
chkconfig --add mysqld
8、使用service mysqld命令启动/停止服务


service mysqld start/stop/restart