linux环境centos7 配置java环境

1.安装jdk1.8

官网下载地址：

http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html

选择操作系统和对应的文件进行下载

直接下载tar.gz版本，不用安装，直接解压就可以

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[root@bogon hcb]# tar zxvf jdk-8u211-linux-x64.tar.gz -C /usr/local

2.安装tomcat

官方网内打不开了。直接通过镜像下载

https://mirrors.cnnic.cn/apache/tomcat/tomcat-8/v8.5.42/bin/

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同样解压安装就可以

tar zxvf apache-tomcat-8.5.42.tar.gz -C /usr/local

建立一个tomcat的快捷方式

ln -s apache-tomcat-8.5.42 tomcat

启动：

[root@bogon tomcat]# pwd
/usr/local/tomcat
[root@bogon tomcat]# ./bin/startup.sh

3.添加防火墙例外，并重启

[root@bogon tomcat]# firewall-cmd --zone=public --add-port=8080/tcp --permanent
success
[root@bogon tomcat]# firewall-cmd --reload

4.物理机输入ip地址测试

image

3.安装Mysql

因为centos 7 默认源mariadb替换了mysql

所以要把mysql先添加到源上

下载mysql源安装包

如果 Centos 系统版本大于7，默认源使用 mariadb 替换掉了 MySQL, 如果仍要安装 MySQL，只能采取源码安装。

安装mysql源

yum localinstall mysql57-community-release-el7-8.noarch.rpm

检查mysql的源是否安装成功

yum repolist enabled | grep “mysql.-community.”

安装Mysql
```
yum install mysql-community-server
```
启动Mysql
```
systemctl start mysqld
```

查看默认的root密码

[root@bogon hcb]# grep 'temporary password' /var/log/mysqld.log 
2019-06-18T05:11:11.189330Z 1 [Note] A temporary password is generated for root@localhost: k(VPiD:wg7lh

修改root密码

提示;ERROR 1819 (HY000): Your password does not satisfy the current policy requirements

这是表示你的新密码安全强度不够。增强密码强度就可以，注意区分大小写

[root@bogon hcb]# mysql -u root -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.7.26

Copyright (c) 2000, 2019, 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> ALTER USER 'root'@'localhost' IDENTIFIED BY 'xdafdafdsaf2123231';

如何关闭密码策略

vi /etc/my.cnf 中最后添加 下面一行。表示 关闭密码策略
validate_password=off

重启mysql后生效
```
systemctl restart mysqld
```
mysql设定开机启动
```
[root@bogon hcb]# systemctl enable mysqld
[root@bogon hcb]# systemctl daemon-reload
```
systemctl 是centos7中用于控制系统服务的。以前版本是service xxx start|stop
daemon 是linux的守护进程，用于后台长期不间断运行的程序

参考：https://blog.csdn.net/yuanlaijike/article/details/78877830

最后编辑于：2019.06.18 22:25:17