1) Download the installation package: https://pan.baidu.com/s/17dyNFbfU2QZhRKvQjjgitw
2) Check whether mysql has been installed under the Linux you are using, and whether it has been uninstalled cleanly
rpm -qa|grep -i mysql mysql-5.7.13-linux-glibc2.5-x86_64
If the library file is already installed, it should be uninstalled first, otherwise an overwrite error will occur. Note the uninstall: the --nodeps option was used when uninstalling, ignoring dependencies:
rpm -e mysql-5.7.13-linux-glibc2.5-x86_64 --nodeps
Of course, you may have more than one file, and there may be more than one file. Then you uninstall it in sequence with rpm -e xx --nodeps. After uninstalling, check it again. If you are sure that it is deleted, go to the following steps.
Find the directory of the previous version of mysql, and delete the files and libraries of the old version of mysql:
find / -name mysql
If the relevant directory is found, use "rm -rf directory address" to delete, such as:
rm -rf /var/lib/mysql rm -rf /var/lib/mysql/mysql rm -rf /var/spool/mail/mysql rm -rf /usr/lib64/mysql rm -rf /usr/share/mysql
3) Unzip the installation package and install it
unzip MySQL-5.7.20.zip cd MySQL-5.7.20 rpm -ivh mysql-community-common-5.7.20-1.el6.x86_64.rpm rpm -ivh mysql-community-libs-5.7.20-1.el6.x86_64.rpm --force rpm -ivh mysql-community-client-5.7.20-1.el6.x86_64.rpm --force rpm -ivh mysql-community-server-5.7.20-1.el6.x86_64.rpm --force
4) Create mysql user and user group
userdel mysql # delete user groupadd mysql useradd -g mysql mysql -s /bin/false #Create user mysql and add it to the mysql group, mysql users are not allowed to log in directly to the system chown -R mysql:mysql /var #Set MySQL database storage directory permissions chown -R mysql:mysql /usr #Set MySQL database storage directory permissions
5) Execute mysqld --initialize --user=mysql
6) Modify the initial password
Enter the log file to find the password generated by initialization
vi /var/log/mysqld.logFind something like this:
A temporary password is generated for root@localhost: x8Ka2oY:D48v
"x8Ka2oY:D48v" is the initial password.
start mysql
service mysqld start
log in to mysql
mysql -uroot -p
Enter the initial password in Enter password: and press Enter
Execute sql to change the password
mysql>set password=password('test2018');
mysql>flush privileges;
mysql>exit;
restart mysql
service mysqld restart
7) Modify the /etc/my.cnf configuration file
vim /etc/my.cnfThe replacement content is as follows:
[mysqld] datadir = / var / lib / mysql socket=/var/lib/mysql/mysql.sock log-error=/var/log/mysqld.log pid-file=/var/run/mysqld/mysqld.pid symbolic-links=0 default-time-zone = '+8:00' lower_case_table_names=1 log_bin_trust_function_creators=1 key_buffer_size = 384M max_allowed_packet = 50M table_open_cache = 512 sort_buffer_size = 2M read_buffer_size = 2M read_rnd_buffer_size = 8M myisam_sort_buffer_size = 64M thread_cache_size = 8 query_cache_size = 32M skip-name-resolve user = mysql log-bin=mysql-bin server-id = 1 character_set_server = utf8 [mysqldump] quick max_allowed_packet = 50M [mysql] no-auto-rehash default-character-set = utf8 [myisamchk] key_buffer_size = 256M sort_buffer_size = 256M read_buffer = 2M write_buffer = 2M [mysqlhotcopy] interactive-timeout [client] default-character-set = utf8
Restart mysql service mysqld restart to complete.
8) Start/restart/stop the mysql service
service mysqld start # start the service service mysqld restart # restart the service service mysqld stop # stop the service
9) Change some encoding
mysql>use mysql mysql>show variables like 'character%'; mysql>SET character_set_database = utf8;
10) mysql remote authorization
mysql> grant all privileges on . to 'root'@'%' identified by 'test2018';
Installed!
11) Database initialization
Log in:
mysql -u root -ptest2018
Create the database:
create database test2018 default charset=utf8;
Exit: exit;
Initialization data:
mysql -uroot -ptest2018 --default-character-set=utf8 mastersp< /home/test2018.sql