linux配置Java环境
CentOS在线安装Mysql5.7
一、通过Yum命令安装
1.下载rpm安装源
官方地址：https://dev.mysql.com/downloads/repo/yum/
rpm文件地址：https://dev.mysql.com/get/mysql57-community-release-el7-11.noarch.rpm
1）通过wget命令下载文件
[root@localhost ~]# wget https://dev.mysql.com/get/mysql57-community-release-el7-11.noarch.rpm --2018-01-08 16:57:46-- https://dev.mysql.com/get/mysql57-community-release-el7-11.noarch.rpm 正在解析主机 dev.mysql.com (dev.mysql.com)... 137.254.60.11 正在连接 dev.mysql.com (dev.mysql.com)|137.254.60.11|:443... 已连接。 已发出 HTTP 请求，正在等待回应... 302 Found 位置：https://repo.mysql.com//mysql57-community-release-el7-11.noarch.rpm [跟随至新的 URL] --2018-01-08 16:57:48-- https://repo.mysql.com//mysql57-community-release-el7-11.noarch.rpm 正在解析主机 repo.mysql.com (repo.mysql.com)... 23.1.165.122 正在连接 repo.mysql.com (repo.mysql.com)|23.1.165.122|:443... 已连接。 已发出 HTTP 请求，正在等待回应... 200 OK 长度：25680 (25K) [application/x-redhat-package-manager] 正在保存至: “mysql57-community-release-el7-11.noarch.rpm” 100%[==================================================================================================================================================================================================>] 25,680 --.-K/s 用时 0.1s 2018-01-08 16:57:48 (232 KB/s) - 已保存 “mysql57-community-release-el7-11.noarch.rpm” [25680/25680]) [root@localhost ~]#
2.安装Mysql
1）安装Mysql源文件
yum localinstall -y mysql57-community-release-el7-11.noarch.rpm
2）查看Mysql源是否安装成功
[root@localhost ~]# yum repolist enabled | grep "mysql.*-community.*" mysql-connectors-community/x86_64 MySQL Connectors Community 42 mysql-tools-community/x86_64 MySQL Tools Community 55 mysql57-community/x86_64 MySQL 5.7 Community Server 227 [root@localhost ~]#
3）安装Mysql服务
yum install -y mysql-community-server
4）查看Mysql服务是否安装成功
[root@localhost ~]# systemctl status mysqld
● mysqld.service - MySQL Server
Loaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled; vendor preset: disabled)
Active: inactive (dead)
Docs: man:mysqld(8)
http://dev.mysql.com/doc/refman/en/using-systemd.html
[root@localhost ~]#
3.启动Mysql
systemctl start mysqld
4.修改root登录密码
1）获取root默认密码（由于Mysql安全策略升级，安装完成后系统自动设置了一个随机密码）
[root@localhost ~]# grep 'temporary password' /var/log/mysqld.log 2018-01-08T09:21:45.780623Z 1 [Note] A temporary password is generated for root@localhost: auw;Nj7J!j/J [root@localhost ~]#
2）登录Mysql
[root@localhost ~]# mysql -uroot -p Enter password: Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 3 Server version: 5.7.20 Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql>
3）修改密码
3.1）由于Mysql默认要求设置密码复杂度高（必须包含 大小写字母、数字、符号）
mysql> alter user 'root'@'localhost' identified by '123456'; ERROR 1819 (HY000): Your password does not satisfy the current policy requirements mysql>
这样设置是合法的：
mysql> alter user 'root'@'localhost' identified by 'Mysql666!'; Query OK, 0 rows affected (0.00 sec) mysql>
3.2）关闭Mysql密码校验规则，允许设置简单密码
3.2.1）在Mysql配置文件最后加入：validate_password = off
[root@localhost ~]# vi /etc/my.cnf # For advice on how to change settings please see # http://dev.mysql.com/doc/refman/5.7/en/server-configuration-defaults.html [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 # # 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 datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock # Disabling symbolic-links is recommended to prevent assorted security risks symbolic-links=0 log-error=/var/log/mysqld.log pid-file=/var/run/mysqld/mysqld.pid validate_password = off
3.2.2）重启Mysql服务生效
systemctl restart mysqld
4）设置简单密码 :)
mysql> alter user 'root'@'localhost' identified by '123456'; Query OK, 0 rows affected (0.00 sec) mysql>
5.配置远程用户登录
1）指定Ip
mysql> grant all privileges on *.* to 'root'@'192.168.1.1' identified by '123456' with grant option; Query OK, 0 rows affected, 1 warning (0.00 sec) mysql>
2）允许所有
mysql> grant all privileges on *.* to 'root'@'%' identified by '123456' with grant option; Query OK, 0 rows affected, 1 warning (0.00 sec) mysql>
6.设置开机启动
systemctl enable mysqld
systemctl daemon-reload
7.其他
1）已配置远程访问权限，依然不能登录？请检查系统是否开启了防火墙。
1.1）CentOS关闭防火墙
systemctl stop firewalld.service
1.2）禁止防火墙开机启动
systemctl disable firewalld.service
2）Mysql客户端软件（推荐）
2.1）SQLyog（官网：https://sqlyog.en.softonic.com/）
2.2）Navicat（官网：https://www.navicat.com/en/）
CentOS在线安装JDK
1、查看JDK版本
选择yum安装tomcat需要的jdk-1.8，就不用再手动配置环境变量。
[root@localhost ~]# yum -y install java-1.8*
2、查看JDK版本
[root@localhost ~]# java -version
openjdk version "1.8.0_191"
OpenJDK Runtime Environment (build 1.8.0_191-b12)
OpenJDK 64-Bit Server VM (build 25.191-b12, mixed mode)
下载Tomcat
https://tomcat.apache.org/download-80.cgi
查看端口 ss -tunlp | grep 9100
查看Java服务有没有起 ps -ef | grep java
测试能不能访问curl localhost:8080
关闭防火墙 systemctl stop firewalld
