今天的总结
ubuntu上彻底卸载MySQL或重新安装 https://www.jianshu.com/p/974b33873bca #查看是否存在mysql服务 service mysql status #查看安装了MySQL的相关软件包 dpkg --get-selections | grep mysql #卸载MySQL apt-get remove --purge mysql-* #清除本地残留文件 apt autoclean #清除无用依赖包（可选） apt autoremove #删除MySQL残留文件 rm -rf /etc/mysql /var/lib/mysql 免编译安装MySQL的方法 安装必要的依赖包 apt-get install libaio1 添加mysql用户 解压MySQL安装包 [root@localhost ~]# groupadd mysql [root@localhost ~]# useradd -r -g mysql -s /bin/false mysql [root@localhost ~]# mkdir -p /data [root@localhost ~]# cd /data [root@localhost data]# tar zxf mysql-5.7.23-linux-glibc2.12-x86_64.tar.gz [root@localhost data]# ln -s mysql-5.7.23-linux-glibc2.12-x86_64 mysql [root@localhost data]# 建立存放日志等目录 cd /data/mysql-5.7.23-linux-glibc2.12-x86_64/ mkdir logs binlogs run 删除旧配置文件 rm -rf /etc/my.cnf /etc/mysql/my.cnf /usr/local/mysql/etc/my.cnf ~/.my.cnf 新增MySQL的配置文件/etc/my.cnf cat > /etc/my.cnf << EOF [client] default-character-set = utf8mb4 port= 3306 socket= /data/mysql/run/mysql.sock [mysql] default-character-set = utf8mb4 prompt = " \u@\h \R:\m:\s [\d]> " no-auto-rehash socket= /data/mysql/run/mysql.sock [mysqld] character-set-server = utf8mb4 collation-server = utf8mb4_unicode_ci character-set-client-handshake = FALSE server-id = 3306 user= mysql port= 3306 basedir= /data/mysql datadir= /data/mysql/data socket= /data/mysql/run/mysql.sock pid-file = /data/mysql/run/mysqld.pid skip_name_resolve = 1 open_files_limit = 65535 back_log = 1024 max_connections = 1024 log-error = /data/mysql/logs/mysql-error.log EOF 初始化MySQL [root@localhost data]# cd /data/mysql [root@localhost mysql]# mkdir mysql-files [root@localhost mysql]# chown mysql:mysql mysql-files [root@localhost mysql]# chmod 750 mysql-files [root@localhost mysql]# chown -R mysql:mysql . [root@localhost mysql]# bin/mysqld --initialize --user=mysql --basedir=/data/mysql --datadir=/data/mysql/data [root@localhost mysql]# bin/mysql_ssl_rsa_setup --datadir=/data/mysql/data ubuntu的unit file路径/lib/systemd/system cat > /lib/systemd/system/mysqld.service << EOF [Unit] Description=MySQL Server Documentation=man:mysqld(8) Documentation=http://dev.mysql.com/doc/refman/en/using-systemd.html After=network.target After=syslog.target [Install] WantedBy=multi-user.target [Service] User=mysql Group=mysql Type=forking PIDFile=/data/mysql/run/mysqld.pid # Disable service start and stop timeout logic of systemd for mysqld service. TimeoutSec=0 # Execute pre and post scripts as root PermissionsStartOnly=true # Needed to create system tables #ExecStartPre=/usr/bin/mysqld_pre_systemd # Start main service ExecStart=/data/mysql/bin/mysqld --daemonize --pid-file=/data/mysql/run/mysqld.pid $MYSQLD_OPTS # Use this to switch malloc implementation EnvironmentFile=-/etc/sysconfig/mysql # Sets open_files_limit LimitNOFILE = 65535 Restart=on-failure RestartPreventExitStatus=1 PrivateTmp=false EOF 配置MySQL环境变量 echo "export PATH=$PATH:/data/mysql/bin" >> /etc/profile source /etc/profile 启动与开机启动MySQL systemctl daemon-reload systemctl start mysqld.service systemctl enable mysqld.service systemctl is-enabled mysqld 用临时密码登录并修改临时密码 [root@localhost ~]# grep 'temporary password' /data/mysql/logs/mysql-error.log 2018-09-24T07:54:08.055154Z 1 [Note] A temporary password is generated for root@localhost: p=lXlKKrg4GJ [root@localhost ~]# mysql -urrott -p "p=lXlKKrg4GJ" mysql shell > alter user root@'localhost' identified by 'root12#$'; mysql shell > \q