Detailed steps for installing MySql 5.7.21 in Linux

Preface

Linux in the most widely used database is MySQL, this article will give you a detailed introduction on the Linux installation of MySql 5.7.21 steps, the article will be introduced in great detail, for everyone's study or work has a certain reference learning value, the following words do not say much, let's take a look at the detailed introduction.

One: download the latest mysql package mysql-5.7.21-linux-glibc2.12-x86_64 from the MySQL official website

Official download address: https://dev.mysql.com/downloads/mysql/

Download address: https://www.jb51.net/softs/38849.html

Second: decompress the mysql package in linux / usr/local/ and rename it to mysql

Cd / usr/local/tar-xzvf mysql compressed package name

Three: create a user group mysql, create a user mysql and add it to the user group mysql, and grant read and write permissions

Groupadd mysql-create a mysql user group group

Useradd-r-g mysql mysql-create a mysql user and add it to the mysql user group

Chown-R mysql mysql/-- assign mysql directory access to the myql user

Chgrp-R mysql mysql/-the user group that changes the mysql directory belongs to the mysql group

Note:

Chmod command

Used to change the access permissions of a file or directory. Users use it to control access to files or directories.

Chgrp command

Change the group to which the file or directory belongs.

-R processes all files in the specified directory and its subdirectories

Four: create a configuration file to save and exit

Vim / etc/my.cnf# copy the following content [client] port = 3306socket = / tmp/ mysql.sock [mysqld] character_set_server=utf8init_connect='SET NAMES utf8'basedir=/usr/local/mysqldatadir=/usr/local/mysql/datasocket=/tmp/mysql.socklog-error=/var/log/mysqld.logpid-file=/var/run/mysqld/mysqld.pid# is case-insensitive lower_case_table_names = 1sqlcards modewritten STRICTRANSRANSTABLES NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTIONmax_connections=5000default-time_zone ='+ 8VR 00'

Five: initialize the database

# install this thing first, otherwise initialization may report an error yum install libaio# manually edit the log file without writing anything, just save and exit cd / var/log/vim mysqld.log:wqchmod 777 mysqld.logchown mysql:mysql mysqld.log/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

Six: check the initial password

Cat / var/log/mysqld.log

Last line: root@localhost: here is the initial password

Seven: start the service, enter mysql, change the initial password, and run the remote connection

# if prompted that the password must be changed to perform the operation, perform the following operations: set password=password ('new password'); flush privileges;UPDATE `mysql`.`user`SET `Host` ='%', `User` = 'root' WHERE (`Host` =' localhost') AND (`User` = 'root') # then do the following to start the mysql service, and set the relevant permissions cd / var/run/mkdir mysqldchmod 777 mysqldcd mysqldvim mysqld.pidchmod 777 mysqld.pidchown mysql:mysql mysqld.pid / usr/local/mysql/support-files/mysql.server start/usr/local/mysql/bin/mysql-uroot-p the initial password you see above # the following is the sql statement use mysql after entering the database UPDATE `mysql`.`user`SET `Host` ='%', `User` = 'root', `Process_ priv` =' YQing, `Insert_ priv` = 'YQing, `Index_ priv` =' YQing, `Delete_ priv` = 'YQing, `Create_ priv` =' YQing, `Drop_ priv` = 'YQing, `Reload_ priv` =' YQing, `Process_ priv` = 'YQing, `File_ priv` =' YQing, `Grant_ priv` = 'YQing, `References_ priv` =' YQing, `Index_ priv` = 'YQing, `Alter_ priv` =' YQing, `Show_db_ priv` = 'YQing, Super_ priv` `Create_routine_ priv` = 'Show_view_ priv`, `Create_routine_ priv` =' Create_routine_ priv`, `Alter_routine_ priv` = 'YQing, `Create_user_ priv` =' YQing, `Create_user_ priv` = 'YQing, `Create_tablespace_ priv` =' YQing, `ssl_ type `='', `ssl_ cipher` ='', `x509issuer` ='' `x509 _ connect` ='', `max_ updates` ='0#, `max_ connections` ='0#, `max_user_ connections` ='0#, `plugin` = 'mysql_native_password', `authentication_ string` =' * 6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9regions, `password_last_ changed` = '2017-11-20 max_ 41VR 07mm, `password_ lifetime` = NULL, `account_ locked` =' N' WHERE (`User` = 'root') Flush privileges

Eight: start up automatically

Cd / usr/local/mysql/support-filescp mysql.server / etc/init.d/mysqldchkconfig-- add mysqld

Nine: start / stop the service using the service mysqld command

Su-mysqlservice mysqld start/stop/restart remote user establishes grant all privileges on *. * to 'new username' @% 'identified by' new password'; flush privileges; adds system path vim / etc/profileexport PATH=/usr/local/mysql/bin:$PATHsource / etc/profile

Use navicat to enter user password connection mysql completed successfully!

Summary

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