Table of contents
3. Use Navicat to connect to MySQL
Source code and other data acquisition methods
1. Download mysql
1. Obtain the download link
Enter the official website: https://www.mysql.com
Click downloads --> MySQL Community (GPL) Downloads --> MySQL Community Server to enter the download interface, select the linux system, find the version you want, right click and copy the link address.
For example, I get the download link of version 5.7.28: https://downloads.mysql.com/archives/get/p/23/file/mysql-5.7.28-linux-glibc2.12-x86_64.tar.gz
2. Use wget to download in linux
Two, install mysql
Unzip and rename
tar -xvf mysql-5.7.28-linux-glibc2.12-i686.tar.gz
mv mysql-5.7.28-linux-glibc2.12-i686 mysql Add users and groups
groupadd mysql
useradd -r -g mysql mysql Create an initialization directory and modify directory permissions
mkdir - p /data/mysql
chown mysql:mysql -R /data/mysql Modify the configuration file /etc/my.cnf
[mysqld]
bind-address=0.0.0.0
user=mysql
basedir=/usr/local/mysql
datadir=/data/mysql
log-error=/data/mysql/mysql.err
pid-file=/data/mysql/mysql.pid
character_set_server=utf8mb4 # 设置创建数据库时的默认字符类型
symbolic-links=0
[client]
port=3306
socket=/tmp/mysql.sockinitialize mysql
cd /usr/local/mysql/bin/
./mysqld --defaults-file=/etc/my.cnf --basedir=/usr/local/mysql --datadir=/data/mysql/ --user=mysql --initializeSet the mysql command as a global command: copy mysql.server to init.d
[root@localhost support-files]# pwd
/usr/local/mysql/support-files
[root@localhost support-files]# cp mysql.server /etc/init.d/mysqlstart service
service mysql startSet to start automatically at boot
chkconfig mysql onlog in to mysql
mysql -u root -p
At this point, mysql is installed and successfully logged in using
3. Use Navicat to connect to MySQL
1. The linux firewall opens port 3306
[root@node1 ~]# firewall-cmd --add-port=3306/tcp --permanent
[root@node1 ~]# firewall-cmd --reload
If the port is not opened, an error 10060 "Unknown error" will be reported:
2. Open the remote access permission of the mysql root user
Log in to mysql in linux and enter the mysql library
View the data in the user table, and modify the value of the root user host field to "%"
MySQL [mysql]> select host,user from user;
MySQL [mysql]> update user set host="%" where user="root";
MySQL [mysql]> flush privileges;
Use Navicat to connect to the database
If the root user access permission is not opened, an error not allowed to connect will be reported:
4. Frequently asked questions
1. The solution to the error Failed to start mysql.service: Unit not found. when starting the service.
2. The login process appears: access denied for user'root'@'localhost'(using password: Yes) solution.
1. Stop the mysql service:
service mysql stop
2 Log in to mysql in background security mode;
find / -name mysqld_safe
cd to the directory where the file is located./mysqld_safe
--user=mysql --skip-grant-tables --skip-networking
3. Open a new window, enter mysql directly on the command line, and log in
4. Modify root user password:
use mysql
update user set authentication_string=password('123456') where user="root";
Note: The field for storing passwords above 5.7 becomes authentication_string, if the above statement is not executed successfully, execute the following statement
update mysql.user set password=PASSWORD(‘123456’)where user=‘root’;
5. Set Password Expiration to No
update user set password_expired='N' where user="root"
6. Refresh and exit:
flush privileges;
quit;
7. Restart the mysql service
service mysql restart;
- When logging in, it prompts -bash: mysql: command not found
Use yum install -y mysql to install
Source code and other data acquisition methods
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