How to install mysql-5.7.28 under Linux

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1. Download the https://dev.mysql.com/downloads/mysql/5.7.html version of Linux on the official website

two。 Upload tar package to server to / usr/local/src

3. Uninstall the automatic Mariadb rpm-qa of the system | grep mariadb rpm-e-- nodeps mariadb-libs-5.5.60-1.el7_5.x86_64

4. Check to see if mysql exists

Rpm-qa | grep-I mysql

5. Query whether there is still a directory of mysql find /-name mysql

6. Decompress: tar-zxvf

7. Modified name: mv mysql-5.7.28-linux-glibc2.12-x86_64/ mysql-5.7.28

8. Check whether mysql groups and users exist, if not created

Cat / etc/group | grep mysqlcat / etc/passwd | grep mysql

Create a mysql group and create a mysql user to join the mysql group

Groupadd mysqluseradd-g mysql mysqlpasswd mysql # set password

8. Change the groups and users to which you belong

[root@localhost src] # chown-R mysql mysql-5.7.28/ [root@localhost src] # chgrp-R mysql mysql-5.7.28/

9. Create data

10. Delete my.cnf under etc: rm-rf / etc/my.cnf; create my.cnf

[mysql] # set mysql client default character set default-character-set=utf8 [mysqld] skip-name-resolve# setting 3306 port port = 3306 # set mysql installation directory basedir=/usr/local/src/mysql-5.7.28# set mysql database data storage directory datadir=/usr/local/src/mysql-5.7.28/data# allows maximum number of connections character set default used by max_connections=200# server Consider the default storage engine default-storage-engine=INNODB lower_case_table_names=1max_allowed_packet=16M that the 8-bit encoded latin1 character set character-set-server=utf8# will use when creating new tables

11. Installation initialization: bin/mysql_install_db-- user=mysql-- basedir=/usr/local/src/mysql-5.7.28/-- datadir=/usr/local/src/mysql-5.7.28/data/

twelve。 Re-modify the permissions of each directory

[root@localhost mysql-5.7.28] # chown-R root:root / usr/local/src/mysql-5.7.28/ [root@localhost mysql-5.7.28] # chown-R mysql:mysql / usr/local/src/mysql-5.7.28/data/

Start mysql

/ usr/local/src/mysql-5.7.28/bin/mysqld_safe-user=mysql &

13. [root@localhost bin] #. / mysql-u root-p # if there is no password by default, you can simply press enter.

14. If you don't remember the password, vi / etc/my.cnf is increasing: skip-grant-tables saves and exits (: wq)

15. Restart mysql:service mysqld restart, and then. / mysql-u root-p enter directly

16. Change password: update user set authentication_string=password ('123456) where user='root'

Flush privileges;quit

18. Modify my.cnf:vi / etc/my.cnf again to delete and save the newly added:: skip-grant-tables and exit (: wq)

19. Restart mysql: service mysqld restart;. / mysql mysql-u root-p enter

20. If this happens,

Systemctl stop firewalld.service # disable firewall service systemctl disable firewalld.service # disable firewall enable start firewall-cmd-- state # check firewall status service mysqld restart

21. Modify permissions

Use mysql;grant all privileges on *. * to root@ "%" identified by "123456"

twenty-two。 If an error occurs

SET PASSWORD = PASSWORD ('123456')

23. Connected successfully

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