Linux安装MySQL8.0
rpm -qa|grep mysql
rpm -qa|grep mariadb
mariadb-libs-5.5.60-1.el7_5.x86_64
rpm -e --nodeps mariadb-libs-5.5.60-1.el7_5.x86_64 执行查询到的rpm包卸载
8.0解压安装步骤
tar xvf mysql-8.0.20-linux-glibc2.12-x86_64.tar.xz
rm -rf mysql-8.0.20-linux-glibc2.12-x86_64.tar.
xz -d mysql-8.0.20-linux-glibc2.12-x86_64.tar.xz
[root@localhost ~]# tar -xvf mysql-8.0.20-linux-glibc2.12-x86_64.tar.xz
[root@localhost ~]# mv mysql-8.0.20-linux-glibc2.12-x86_64 /usr/local/mysql
[root@localhost ~]# cd /usr/local/mysql/
[root@localhost mysql]# mkdir /var/lib/mysql
[root@localhost mysql]# mkdir /usr/local/mysql/data
[root@localhost mysql]# groupadd mysql
[root@localhost mysql]# id mysql 添加用户和组如果之前存在就删除它重新添加
id: mysql: no such user userdel mysql groupdel mysql
[root@localhost mysql]# useradd -r -g mysql -s /bin/false mysql 一个不可登录的 安全的组
[root@localhost mysql]# chown -R mysql:mysql /var/lib/mysql
[root@localhost mysql]# chown -R mysql:mysql /usr/local/mysql/data
[root@localhost mysql]# chown -R mysql:mysql /usr/local/mysql
[root@localhost mysql]# ls -lsa
修改环境变量
root@localhost mysql]# cd bin/
[root@localhost bin]# pwd
/usr/local/mysql/bin
[root@localhost bin]# vi ~/.bash_profile
PATH=$PATH:/usr/local/mysql/bin:$HOME/bin
执行exit 退出后 再次连接登录
[root@localhost ~]# which mysql
/usr/local/mysql/bin/mysql 代表mysql安装成功
[root@localhost ~]# mkdir /usr/local/mysql/log 创建日志目录
[root@localhost ~]# chown -R mysql:mysql /usr/local/mysql/log
先创建日志目录并赋予权限
# vi /etc/my.cnf
[mysql]
default-character-set=utf8mb4
socket=/var/lib/mysql/mysql.sock
[mysqld]
port=3306
socket=/var/lib/mysql/mysql.sock
basedir=/usr/local/mysql
character-set-server=utf8mb4
default-storage-engine=INNODB
innodb_buffer_pool_size=200M
max_allowed_packet=16M
explicit_defaults_for_timestamp=1
log-output=FILE
general_log=0
general_log_file=/usr/local/mysql/log/sky02-general.err
slow_query_log=ON
slow_query_log_file=/usr/local/mysql/log/sky02-query.err
long_query_time=10
log-error=/usr/local/mysql/log/sky02-error.err
default-authentication-plugin=mysql_native_password
yum install libaio 需先安装 初始化需依赖它 error while loading shared libraries: libaio.so.1:
/usr/local/mysql/bin/mysqld --initialize --user=mysql --basedir=/usr/local/mysql/ --datadir=/usr/local/mysql/data/
# cd /usr/local/mysql/log/
[root@localhost log]# ls 错误日志查询
[root@itsky ~]# cd /usr/local/mysql/log/
[root@itsky log]# ls
sky02-error.err sky02-query.err
[root@itsky log]# tail -100f sky02-error.err 查看日志后100行内容 有初始的密码存在
l 创建Linux启动脚本
[root@itsky ~]# vi /usr/lib/systemd/system/mysqld.service
[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
ExecStart=/usr/local/mysql/bin/mysqld --defaults-file=/etc/my.cnf
LimitNOFILE= 65536
LimitNPROC=65536
系统启动脚本 D服务类型和描述文档 A脚本是在网络和系统日志之后启动 L 文件描述符 文件进程数
赋予权限
chmod u+x /usr/lib/systemd/system/mysqld.service
启动mysql
# systemctl daemon-reload
systemctl status mysqld
systemctl start mysqld
systemctl status mysqld
systemctl stop mysqld
systemctl status mysqld
systemctl enable mysqld 开机自动启动
手动启动和开机启动MySQL
nohup /usr/local/mysql/bin/mysqld_safe --defaults-file=/etc/my.cnf & 敲2次回车
# mysqladmin -uroot -p shutdown -S /var/lib/mysql/mysql.sock 手动停止MySQL
Enter password:
[root@itsky ~]# ps -ef|grep mysql
修改密码
mysql> alter user 'root'@'localhost' identified with mysql_native_password by'rootroot';
Query OK, 0 rows affected (0.00 sec)
exit
创建root远程登录
use mysql;
create user 'root'@'%' identified with mysql_native_password by 'root';
mysql> grant all privileges on *.* to 'root'@'%' with grant option;
select host,user from user where user='root';
远程登录
firewall-cmd --state 远程连接需关闭防火墙
systemctl stop firewalld.service
systemctl status firewalld.service
# systemctl disable firewalld.service
# mysql -u root -p -h192.168.101.22
创建数据库
mysql> create database itskydb default charset utf8mb4; 创建数据库
Query OK, 1 row affected (0.04 sec)
mysql> create user 'itsky'@'%' identified by 'itsky'; 创建itsky用户
Query OK, 0 rows affected (0.01 sec)
mysql> select host,user from mysql.user; 查看所有用户
mysql> grant all privileges on itsky.* to 'itsky'@'%' with grant option; 用户授权
Query OK, 0 rows affected (0.03 sec)
创建表
use itskydb
mysql> create table itsky01(
-> id int auto_increment primary key,
-> name varchar(15)
-> ) engine = InnoDB;
Query OK, 0 rows affected (0.04 sec)
数据插入
insert into itsky01 values (1,'xxxx01');
insert into itsky01 values (2,'xxxx02');
insert into itsky01 values (3,'itsky03');
select *from itsky01;
mysql 卸载
删除 /usr/local/mysql /etc/my.cnf /var/lib/mysql 关机 还原