The following are the installation steps of MySQ. There are many pitfalls during the installation process. I have written them one by one below. I hope it will be helpful to you, la la la
yum install wget -y If no wget is installed, wget is a download tool
mv CentOS-Base.repo CentOS-Base.repo.backup change the file name, (this step is to change the yum source later, the downloaded yum source is named CentOS-Base.repo)
Replace yum source:
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo
Update the local cache:
yum clean all
yum makecache
Check if the system comes with mysqk, it is not displayed on my machine, it means it is not, if the system has it, you need to delete yum -y remove mysql-libs.x86_64
Download the yum installation package of mysql
wget dev.mysql.com/get/mysql-community-release-el6-5.noarch.rpm
Install mysql
yum install mysql-community-release-el6-5.noarch.rpm -y
cd /etc/yum.repos.d Switch to this directory, after the installation is complete, two mysql-related files will appear
vim mysql-community.repo modify the configuration file, modify the download source to version 5.7
before fixing
After modification
Use yum to install mysql
yum install mysql-community-server -y
Report an error during installation
Error: Package: mysql-community-server-5.7.33-1.el6.x86_64 (mysql57-community-dmr)
Requires: libsasl2.so.2()(64bit)
https://blog.csdn.net/qq_38417808/article/details/81291588 Solve the blog
Modify the vim /etc/yum.repos.d/mysql-community.repo source file
来自 <https://blog.csdn.net/qq_38417808/article/details/81291588>
before fixing:
After modification:
Re-execute the yum install mysql-community-server -y operation after the modification is completed
Check the startup status:
systemctl status mysqld
Update the yum certificate yum update -y
A temporary password needs to be generated before startup, a certificate is required, and the certificate may expire, and an update operation is required
At this point mysql has been started, you need to check the mysql startup password by viewing the log:
grep root@localhost /var/log/mysqld.log
or
grep 'temporary password' /var/log/mysqld.log
Log in to mysql at this time and enter this password
Ahhhhhhhh! My temporary password is directly copied and pasted, or the actual password is wrong. . . Have not been able to board,
Solution, there may be a problem with the temporary password, try to generate the temporary password again:
The operation is as follows:
service mysqld stop stops the mysql server first,
rm -rf /var/lib/mysql delete this mysql folder, in order to regenerate temporary files when restarting
systemctl restart mysqld restart mysql server
grep'temporary password' /var/log/mysqld.log found two pieces of data, the bottom one is the first password
Execute mysql -u root -p
Then enter the temporary password and finally log in
change Password:
Change to a simple password for easy login,
First adjust the password level, then change the password
set global validate_password_policy=0;
set global validate_password_length=1;
ALTER USER 'root'@'localhost' IDENTIFIED BY '123456';
Modify the encoding method
Vim /etc/my.cnf
#Add in the [mysqld] section:
character-set-server=utf8
#Add a [client] section at the end of the file, and add in the [client] section:
default-character-set=utf8
View code:
show variables like "%character%";
Use Navicat to connect successfully:
The Chinese form is inserted successfully!
