添加 ubuntu-mysql5.7.md

ubuntu-mysql5.7.md

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+切换目录
+```
+cd /usr/local
+```
+
+浏览器打开 https://dev.mysql.com/downloads/mysql/5.7.html#downloads 选择配置然后下载
+
+- Archives
+- 5.7.44
+- Linux - Generic
+- 64-bit
+- Compressed TAR Archive
+
+浏览器建立下载任务后，复制下载链接，回到命令行通过命令下载解压
+
+```
+wget 下载链接
+```
+```
+tar -zvxf mysql-5.7.44-linux-glibc2.12-x86_64.tar.gz
+```
+```
+mv mysql-5.7.44-linux-glibc2.12-x86_64 /usr/local/mysql
+```
+```
+cd /usr/local/mysql
+```
+
+创建必要的目录
+
+```
+mkdir data
+```
+```
+mkdir tmp
+```
+```
+mkdir run
+```
+```
+mkdir log
+```
+
+创建必要的文件
+```
+cd run
+```
+```
+touch mysql.sock
+```
+```
+touch mysql.pid
+```
+
+编辑配置文件
+```
+vim /etc/my.cnf
+```
+
+复制粘贴以下内容
+```
+[client]
+port = 24100
+socket = /usr/local/mysql/run/mysql.sock
+[mysqld]
+user = root
+server-id = 1
+port = 24100
+basedir = /usr/local/mysql
+datadir = /usr/local/mysql/data
+tmpdir  = /usr/local/mysql/tmp
+socket = /usr/local/mysql/run/mysql.sock
+pid-file = /usr/local/mysql/run/mysql.pid
+character-set-server = utf8mb4
+collation-server = utf8mb4_general_ci
+init_connect='SET NAMES utf8mb4'
+lower_case_table_names = 1
+max_connections = 400
+max_connect_errors = 1000
+explicit_defaults_for_timestamp = true
+max_allowed_packet = 128M
+interactive_timeout = 1800
+wait_timeout = 1800
+tmp_table_size = 16M
+max_heap_table_size = 128M
+query_cache_size = 0
+query_cache_type = 0
+read_buffer_size = 2M
+read_rnd_buffer_size = 8M
+sort_buffer_size = 8M
+binlog_cache_size = 1M
+back_log = 130
+log_error = /usr/local/mysql/log/error.log
+slow_query_log = 1
+long_query_time = 5
+slow_query_log_file = /usr/local/mysql/log/slow.log
+log_throttle_queries_not_using_indexes = 0
+min_examined_row_limit = 100
+expire_logs_days = 5
+log-bin = mysql-bin
+binlog_format = ROW
+binlog_row_image = minimal
+innodb_open_files = 300
+innodb_buffer_pool_size = 512M
+innodb_log_buffer_size = 2M
+innodb_flush_method = O_DIRECT
+innodb_write_io_threads = 4
+innodb_read_io_threads = 4
+innodb_lock_wait_timeout = 60
+innodb_log_file_size = 32M
+sql_mode=STRICT_TRANS_TABLES,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION,NO_ZERO_IN_DATE,NO_ZERO_DATE
+```
+
+初始化mysql
+```
+cd /usr/local/mysql/bin
+```
+```
+./mysqld --defaults-file=/etc/my.cnf --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data --user=root --initialize
+```
+
+查看默认密码
+```
+cat /usr/local/mysql/log/error.log
+```
+
+找到这一行，截图或者复制粘贴出来等下要用
+```
+[Note] A temporary password is generated for root@localhost: xxxxxx
+```
+
+运行mysql
+```
+cd /usr/local/mysql/support-files
+```
+```
+./mysql.server start
+```
+
+命令行连接mysql
+```
+cd /usr/local/mysql/bin
+```
+
+密码是前面看到的默认密码
+```
+./mysql -u root -p
+```
+
+修改root账号的默认密码
+
+```
+SET PASSWORD = PASSWORD('填写明文密码');
+```
+```
+ALTER USER 'root'@'localhost' PASSWORD EXPIRE NEVER;
+```
+
+刷新
+```
+FLUSH PRIVILEGES;
+```
+
+添加用户
+```
+CREATE USER '用户名'@'%' IDENTIFIED BY '填写明文密码';
+```
+
+建库
+```
+CREATE DATABASE `库名`;
+```
+
+授权（不要忘记刷新）
+```
+GRANT ALL ON 库名.* TO '用户名'@'%';
+```