Installing MySQL on Linux

The activation of a service requires the support of a database ,mysql  Oracle  SQL Server Etc., etc.

mysql It is the database I have used most since I worked , Companies of all sizes are using it

MySQL By MySQL AB company （ It has been SUN The company is under its command ） Independently developed , at present IT One of the most popular open source database management systems in the industry , It is also a relational database management system that supports multithreading, high concurrency and multi-user .

MySQL Is a relational database management system , Relational databases keep data in different tables , Instead of putting all the data in one big warehouse , This increases speed and flexibility .

 

Well, let's say I'm Centos 7   Linux Installation in environment Mysql step ( Pay attention to the version problem )

ps aux|grep mysql

Whether there is mysql Running

rpm -qa | grep mysql

Re examination mysql Whether there is

If there is, unload

rpm -e --nodeps mysql-libs-5.1.73-5.el6_6.x86_64

 whereis mysql

The query again mysql Related contents

rm -rf   /usr/bin/mysql /usr/lib64/mysql  /usr/local/mysql

Remove the corresponding folder

Well, the preparations are almost done

cd /usr/local/

wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-5.7.24-linux-glibc2.12-x86_64.tar.gz

That's all. mysql Download it

tar xzvf mysql-5.7.24-linux-glibc2.12-x86_64.tar.gz

decompression

mv mysql-5.7.24-linux-glibc2.12-x86_64 mysql

There is a mysql The catalog of

cd mysql/

mkdir data

 mysql A folder is created data Folder

cd ~

chown -R mysql:mysql /usr/local/mysql

chmod -R 755 /usr/local/mysql

add to mysql The user group and user to which the folder belongs , And authority

cd /usr/local/mysql/bin

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

initialization mysql It's done.

Pay attention to the end of the printed log    [email protected]:XXXXXXXXXXXXXX The following string is mysql Administrator temporary login password .

 vi /etc/my.cnf

[mysqld]
datadir=/usr/local/mysql/data
port=3306
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
symbolic-links=0
max_connections=600
innodb_file_per_table=1
lower_case_table_names=1
character_set_server=utf8

Add the above content to the configuration file ok

 

cd ~

/usr/local/mysql/support-files/mysql.server start

Start the service

  ln -s /usr/local/mysql/support-files/mysql.server /etc/init.d/mysql 
  ln -s /usr/local/mysql/bin/mysql /usr/bin/mysql
  service mysql restart

mysql -u root -p

Enter password:

mysql>set password for [email protected] = password('root');

mysql>use mysql;

msyql>update user set user.Host='%' where user.User='root';

mysql>flush privileges;

The above commands are executed in sequence    set password for [email protected] = password('root');      there password('root'); Inside root For the password you want to set

such mysql It has been successfully installed