1、下載mysql8安裝包linux 版本

????????mysql-8.0.25-linux-glibc2.12-x86_64.tar

2、創建文件夾 并進入到文件夾中，文件夾名稱隨便取

mkdir /env; cd env;

3、上傳mysql包，可以使用linux 的rz命令上傳，如果找不到命令，先安裝下命令

yum install -y lrzsz

4、解壓mysql包

tar -xvf mysql-8.0.25-linux-glibc2.12-x86_64.tar.xz

5、移動解壓后的文件夾到/usr/local/mysql

mv mysql-8.0.25-linux-glibc2.12 /usr/local/mysql

6、創建data文件夾，一般用于存放數據庫文件數據

mkdir /usr/local/mysql/data

7、創建用戶組

groupadd mysql; useradd -g mysql mysql;

8、更改用戶文件夾權限

chown -R mysql.mysql /usr/local/mysql/

9、生成my.cnf文件

touch /etc/my.cnf

10、編輯my.cnf

[mysql] default-character-set=utf8[mysqld] port=3306 default_authentication_plugin=mysql_native_password socket = /usr/local/mysql/mysql.sock basedir=/usr/local/mysql datadir=/usr/local/mysql/data/ character-set-server=utf8 default-storage-engine=InnoDB collation-server=utf8_unicode_ci init_connect='SET NAMES utf8' innodb_buffer_pool_size=512M innodb_flush_log_at_trx_commit=0 innodb_lock_wait_timeout=31536000 innodb_log_buffer_size=8M innodb_log_file_size=16M join_buffer_size=200M key_buffer_size=400M log-error=/usr/local/mysql/mysql.log pid-file=/usr/local/mysql/mysql.pid log_error_verbosity=1 max_allowed_packet=2000M max_connections=1000 max_heap_table_size=6400M myisam_max_sort_file_size=64M myisam_sort_buffer_size=32M read_buffer_size=4M read_rnd_buffer_size=4000M server_id=1 skip-external-locking=on sort_buffer_size=256kb table_open_cache=256 thread_cache_size=16 tmp_table_size=64M wait_timeout=31536000 interactive_timeout=31536000 sql_mode="STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION" group_concat_max_len=10240[client] port=3306 default-character-set=utf8 socket = /usr/local/mysql/mysql.sock

11、再次更改用戶文件夾權限

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

12、初始化數據庫

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

備注：這里可能會報錯 提示

error while loading shared libraries: libaio.so.1: cannot open shared object file directory

可以執行以下命令

yum install libaio-devel.x86_64

13、繼續執行初始化數據庫命令

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

14、查看初始化密碼 日志文件在??/usr/local/mysql/mysql.log

?15、修改配置，挨個執行，如果報錯，跳過

cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqld chmod +x /etc/init.d/mysqld chmod +x /etc/rc.d/init.d/mysqld chkconfig --add mysqld chkconfig --list mysqld

16、修改環境變量，并重載環境變量文件，打開 /etc/profile 在底部添加如下命令

export PATH=$PATH:/usr/local/mysql/bin:/usr/local/mysql/lib export PATH

執行?

source /etc/profile

17、啟動mysql

service mysql start

18、登錄mysql，密碼是上面的初始化密碼

mysql -uroot -p;

19、第一次登錄必須要先修改密碼不然會提示

ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.

執行修改密碼命令

alter user 'root'@'localhost' identified by '密碼';

20、授權遠程訪問

update user set host='%' where user='root'

21、查看防火墻或者是組策略是否放行了3306端口

總結

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