计算机科学5。7

　　创建 mysql 用户与用户组sudo groupadd mysql sudo useradd -g mysql mysql -s/sbin/nologin修改用户目录权限cd /usr/local/mysql sudo mkdir data sudo chown -R mysql:mysql .初始化安装sudo cp support-files/mysql.server /etc/init.d/ sudo bin/mysqld --user=mysql --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data --initialize  # 记下安装过程中的临时密码，后边用于修改 root 密码(yq7A*IhE5kl0)
　　mysql 临时密码修改配置sudo  vi /etc/my.cnf  # 输入以下内容 [mysqld]  # Remove leading # and set to the amount of RAM for the most important data # cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%. # innodb_buffer_pool_size = 128M  # Remove leading # to turn on a very important data integrity option: logging # changes to the binary log between backups. # log_bin  # These are commonly set, remove the # and set as required. # basedir = ..... # datadir = ..... # port = ..... basedir = /usr/local/mysql datadir = /usr/local/mysql/data socket = /tmp/mysql.sock bind-address=0.0.0.0 # server_id = ..... # socket = .....  # Remove leading # to set options mainly useful for reporting servers. # The server defaults are faster for transactions and fast SELECTs. # Adjust sizes as needed, experiment to find the optimal values. # join_buffer_size = 128M # sort_buffer_size = 2M # read_rnd_buffer_size = 2M   sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES将 mysql 添加到 PATH 路径启动服务与修改 mysql root 用户密码sudo service mysql start  # 输入安装时生成的临时密码进行登录 mysql -uroot -p # 修改密码 ALTER USER ＂root＂@＂localhost＂ identified BY ＂123456＂;