Linux下安装Mysql5.7.x数据库，linuxmysql5.7.x

Linux下安装Mysql5.7.x数据库，linuxmysql5.7.x

首先检查是否存在mariadb 如果存在需要卸载 ps -ef| grep mariadb mysql    31760 28814  0 18:16 pts/1    00:00:00 grep --color=auto mariadb   rpm -qa | grep mariadb mariadb-libs-5.5.52-1.el7.x86_64 卸载 rpm -e mariadb-libs-5.5.52-1.el7.x86_64 会提示有依赖于这的安装包，那么就强制卸载，不查检依赖： rpm -e --nodeps mariadb-libs-5.5.52-1.el7.x86_64 将所有的mariadb安装包都删除，然后自行安装MySQL就可以了
1---->rpm -qa|grep -i mysql 检查是否已经有安装，可见已经安装了库文件，应该先卸载，不然会出现覆盖错误。注意卸:载时使用了--nodeps选项，忽略了依赖关系 2---->检查用户组是否存储cat /etc/group | grep mysql 检查用户是否存在cat /etc/passwd | grep mysql [mysql@oracledb_178 ~]$ cat /etc/group | grep mysql mysql:x:1002: [mysql@oracledb_178 ~]$ cat /etc/passwd | grep mysql mysql:x:1001:1002::/home/mysql:/bin/bash
3---->如果不存在新建 groupadd mysql 建立用户组 useradd -r -g mysql mysql 建立用户 useradd -r参数表示mysql用户是系统用户，不可用于登录系统 进入mysql文件夹，也就是mysql所在的目录，并更改所属的组和用户 chown -R mysql . chgrp -R mysql . 4---->解压 tar xvf mysql-5.7.18-linux-glibc2.5-x86_64.tar.gz mv mysql-5.7.18-linux-glibc2.5-x86_64 ../mysql-5.7.18
5---->执行mysql_install_db脚本 报错 mysql_install_db is deprecated. Please consider switching to mysqld --initialize 2017-09-01 11:50:57 [ERROR]   The data directory needs to be specified.mysql_install_db 已经不再推荐使用了，建议改成 mysqld –initialize 完成实例初始化 5.7.X的版本使用mysqld 执行命令： ./mysqld --user=mysql --datadir=/home/mysql/mysql-5.7.18/data --basedir=/home/mysql/mysql-5.7.18  --initialize 结果如下：必须记住A temporary password is generated for root@localhost: Cuc_gue<B7Li   017-09-01T10:22:39.683534Z 0 [Warning] Changed limits: max_open_files: 1024 (requested 5000) 2017-09-01T10:22:39.683770Z 0 [Warning] Changed limits: table_open_cache: 431 (requested 2000) 2017-09-01T10:22:39.684125Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details). 2017-09-01T10:22:42.210352Z 0 [Warning] InnoDB: New log files created, LSN=45790 2017-09-01T10:22:42.696775Z 0 [Warning] InnoDB: Creating foreign key constraint system tables. 2017-09-01T10:22:42.776470Z 0 [Warning] No existing UUID has been found, so we assume that this is the first time that this server has been started. Generating a new UUID: 7d47ff18-8eff-11e7- 9079-000c2918d28c.2017-09-01T10:22:42.780141Z 0 [Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened. 2017-09-01T10:22:42.781062Z 1 [Note] A temporary password is generated for root@localhost: Cuc_gue<B7Li
  6----> 检测一下是否能启动 ./mysql.server start ./mysql.server: line 239: my_print_defaults: command not found ./mysql.server: line 259: cd: /usr/local/mysql: No such file or directory Starting MySQL ERROR! Couldn't find MySQL server (/usr/local/mysql/bin/mysqld_safe) 修改./mysql.server文件的 basedir=/home/mysql/mysql-5.7.18 datadir=/home/mysql/mysql-5.7.18/data 执行 $ ./mysql.server start Starting MySQL. SUCCESS!
  6---->配置my.cnf [mysqld] basedir=/home/mysql/mysql-5.7.18 datadir=/home/mysql/mysql-5.7.18/data # Disabling symbolic-links is recommended to prevent assorted security risks symbolic-links=0 # Settings user and group are ignored when systemd is used. # If you need to run mysqld under a different user or group, # customize your systemd unit file for mariadb according to the # instructions in http://fedoraproject.org/wiki/Systemd [mysql] default-character-set=utf8 [mysqld] character_set_server=utf8 [mysqld_safe] log-error=/home/mysql/mysql-5.7.18/data/error.log pid-file=/home/mysql/mysql-5.7.18/data/oracledb_178.pid # # include all files from the config directory # !includedir /etc/my.cnf.d   7---->拷贝启动文件到/etc/init.d/下并重命令为mysqld cp /home/mysql/mysql-5.7.18/support-files/mysql.server /etc/init.d/mysqld   8------->增加执行权限 chmod 755 /etc/init.d/mysqld   9------->检查自启动项列表中没有mysqld这个，如果没有就添加mysqld： chkconfig --list mysqld chkconfig --add mysqld   10---------->用这个命令设置开机启动： chkconfig mysqld on   11---------->停止mysql服务 service mysqld stop 重启mysql服务 service mysqld restart
12--->初始化mysql用户root的密码 先将mysql服务停止 # service mysqld stop   进入mysql安装目录，   cd mysql-5.7.18/bin 执行 ./mysqld_safe --skip-grant-tables --skip-networking&   然后打开另一个新的ssl窗口 cd mysql-5.7.18/bing ./mysql -u root mysql 执行 mysql> use mysql; Database changed mysql> UPDATE user SET password=PASSWORD('123456') WHERE user='root'; ERROR 1054 (42S22): Unknown column 'password' in 'field list' mysql> update user set authentication_string = PASSWORD('123456') where user = 'root';   执行 mysql>\s -------------- ./mysql  Ver 14.14 Distrib 5.7.18, for linux-glibc2.5 (x86_64) using  EditLine wrapper
Connection id: 3 Current database: mysql Current user: root@ SSL: Not in use Current pager: stdout Using outfile: '' Using delimiter: ; Server version: 5.7.18 MySQL Community Server (GPL) Protocol version: 10 Connection: Localhost via UNIX socket Server characterset: latin1 Db     characterset: latin1 Client characterset: utf8 Conn.  characterset: utf8 UNIX socket: /tmp/mysql.sock Uptime: 3 min 57 sec   Threads: 1  Questions: 43  Slow queries: 0  Opens: 127  Flush tables: 1  Open tables: 52  Queries per second avg: 0.181 --------------   mysql> exit;   12--->重新启动mysql服务， 用新密码连接mysql mysql@oracledb_178 bin]$ ./mysql -uroot -p 13---> 远程授权 grant all privileges on *.* to 'root'@'%' identified by '123456'; grant all on *.* to 'root'@'%' identified by '123456';  ERROR 1290 (HY000): The MySQL server is running with the --skip-grant-tables option so it cannot execute this statement   出现上面的错误只需要执行mysql>flush privileges;   在执行 mysql> grant all on *.* to 'root'@'%' identified by '123456'; Query OK, 0 rows affected, 1 warning (0.00 sec)   客户端navacat无法连接关闭防火墙 关闭firewall： systemctl stop firewalld.service #停止firewall systemctl disable firewalld.service #禁止firewall开机启动 firewall-cmd --state #查看默认防火墙状态（关闭后显示notrunning，开启后显示running）   12--->最后重新启动一下，然后客户端就可以连接mysql了