linux安装MySQL8

linux安装MySQL

1.1下载、解压、 （1）在opt（操作目录）目录下新建install文件夹，下载mysql-8.0.30-linux-glibc2.12-x86_64.tar.xz使用Xftp将文件移至install文件夹中 下载mysql安装包网址：MySQL :: Download MySQL Community Server (Archived Versions) （2）放到服务器后解压 -C 放到指定文件夹  tar -xvf ./mysql-8.0.30-linux-glibc2.12-x86_64.tar.xz -C /usr/local/ 安装完成后ll查看细节 （3）修改mysql文件夹名

1.2  创建mysql 用户和用户组

1.3  创建数据文件夹datas，并赋予权限

1.4  给mysql的log目录权限

1.5  修改mysql配置文件（可以在/usr/local/mysql8创建my.cnf文件，更改安装目录） [mysql] # 默认字符集 default-character-set=utf8mb4 [client] port       = 3306 socket     = /tmp/mysql.sock [mysqld] port       = 3306 server-id  = 3306 user       = mysql socket     = /tmp/mysql.sock # 安装目录 basedir    = /usr/local/mysql8 # 数据存放目录 datadir    = /usr/local/mysql8/datas/mysql log-bin    = /usr/local/mysql8/datas/mysql/mysql-bin innodb_data_home_dir      =/usr/local/mysql8/datas/mysql innodb_log_group_home_dir =/usr/local/mysql8/datas/mysql #日志及进程数据的存放目录 log-error =/usr/local/mysql8/datas/mysql/mysql.log pid-file  =/usr/local/mysql8/datas/mysql/mysql.pid # 服务端使用的字符集默认为8比特编码 character-set-server=utf8mb4 lower_case_table_names=1 autocommit =1    ##################以上要修改的######################## skip-external-locking key_buffer_size = 256M max_allowed_packet = 1M table_open_cache = 1024 sort_buffer_size = 4M net_buffer_length = 8K read_buffer_size = 4M read_rnd_buffer_size = 512K myisam_sort_buffer_size = 64M thread_cache_size = 128   #query_cache_size = 128M tmp_table_size = 128M explicit_defaults_for_timestamp = true max_connections = 500 max_connect_errors = 100 open_files_limit = 65535    binlog_format=mixed     binlog_expire_logs_seconds =864000     # 创建新表时将使用的默认存储引擎 default_storage_engine = InnoDB innodb_data_file_path = ibdata1:10M:autoextend innodb_buffer_pool_size = 1024M innodb_log_file_size = 256M innodb_log_buffer_size = 8M innodb_flush_log_at_trx_commit = 1 innodb_lock_wait_timeout = 50 transaction-isolation=READ-COMMITTED       [mysqldump] quick max_allowed_packet = 16M        [myisamchk] key_buffer_size = 256M sort_buffer_size = 4M read_buffer = 2M write_buffer = 2M         [mysqlhotcopy] interactive-timeout

1.6  添加环境变量 在etc/profile文件中添加： 保存退出，并更新资源

1.7  初始化MySQL mysqld --defaults-file=/usr/local/mysql8/my.cnf --basedir=/usr/local/mysql8/ --datadir=/usr/local/mysql8/datas/mysql --user=mysql --initialize-insecure

1.8  启动mysql服务 mysqld_safe --defaults-file=/usr/local/mysql8/my.cnf &（此处环境变量配置完后省略了bin路径） 查看是否启动：ps -ef | grep mysql

1.9  跳过密码登录mysql：mysql -uroot --skip-password 登录成功，尝试查看数据库名

1.10  修改密码 # 修改密码为123456 ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '123456'; # 刷新权限 FLUSH PRIVILEGES;

1.11  设置远程登录 mysql> use mysql mysql> update user set user.Host='%'where user.User='root'; mysql> flush privileges; mysql> quit

1.12  在可视化界面中测试连接

1.13  设置mysql开机自启动 （1）在/etc/rc.d/init.d目录下创建脚本vim ./autostartmysql.sh开机自启动mysql      #!/bin/bash # chkconfig:2345 10 90 # description:myservice.. /usr/local/mysql8/bin/mysqld_safe --defaults-file=/usr/local/mysql8/my.cnf & （2）赋予脚本执行权限：chmod +x autostartmysql.sh （3）设置开机自启：chkconfig --add autostartmysql.sh      chkconfig autostartmysql.sh on （4）查看开机自启是否设置成功 （5）重启虚拟机测试：shutdown -r now 开机后查看mysql进程 设置mysql服务开机自启动成功！