【Linux学习一】在Centos7下，用yum安装tomcat以及MySQL5.7

矫情吗；* 2022-04-25 09:10 182阅读 0赞

### 【Linux学习一】在Centos7下，用yum安装tomcat以及MySQL5.7 ###

*  一、用yum安装tomcat
 *  二、用yum安装MySQL5.7

# 一、用yum安装tomcat #

*  检查当前的centos系统是否安装了tomcat

> systemctl status tomcat.service  
> 或者  
> systemctl status tomcat

出现如图所示，可以看到找到了tomcat.service，说明这台机器上安装好了tomcat  
![在这里插入图片描述][20190530225021275.png]

*  开始安装tomcat

> yum -y install tomcat

*  查看是否安装成功

> rpm -q tomcat

执行命令后，出现如下图所示，表示安装成功.  
![在这里插入图片描述][20190530230105635.png]

*  关闭防火墙

> systemctl stop firewalld.service

*  启动tomcat服务

> systemctl restart tomcat

然后在浏览器里刷http://ip:8080 就可以看到tomcat的页面了  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzI1MzI4Ng_size_16_color_FFFFFF_t_70]

*  其他相关命令

1.  停止 tomcat 服务

> systemctl stop tomcat

1.  重启 tomcat 服务

> systemctl restart tomcat

# 二、用yum安装MySQL5.7 #

**1. 配置YUM源**  
在MySQL官网中下载YUM源rpm安装包：[https://dev.mysql.com/downloads/repo/yum/][https_dev.mysql.com_downloads_repo_yum]

> （1）下载mysql源安装包  
> wget [http://dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm][http_dev.mysql.com_get_mysql57-community-release-el7-8.noarch.rpm]  
> （2）安装mysql源  
> yum localinstall mysql57-community-release-el7-8.noarch.rpm

检查mysql源是否安装成功

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

**2. 安装mysql**

> yum install mysql-community-server

**3. 启动mysql服务**

> systemctl start mysqld

**4. 查看mysql的启动状态**

> systemctl status mysqld

如下图所示：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzI1MzI4Ng_size_16_color_FFFFFF_t_70 1]  
**5. 开机启动**

> systemctl enable mysqld

mysql安装完成之后，在/var/log/mysqld.log文件中给root生成了一个默认密码，通过下面的方式找到root默认密码，然后就可以登录mysql

> grep ‘temporary password’ /var/log/mysqld.log

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzI1MzI4Ng_size_16_color_FFFFFF_t_70 2]

[20190530225021275.png]: /images/20220125/00d2303f6da64f8fa4b562f23c2a8c8d.png
[20190530230105635.png]: /images/20220125/51c46cb539984317a4880166fc9cf7c9.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzI1MzI4Ng_size_16_color_FFFFFF_t_70]: /images/20220125/4e62630053ee4c61a5de9bdb7337e56c.png
[https_dev.mysql.com_downloads_repo_yum]: https://dev.mysql.com/downloads/repo/yum/
[http_dev.mysql.com_get_mysql57-community-release-el7-8.noarch.rpm]: http://dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzI1MzI4Ng_size_16_color_FFFFFF_t_70 1]: /images/20220125/ac3ff55f4cd5499791d05f7848b1f5f9.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzI1MzI4Ng_size_16_color_FFFFFF_t_70 2]: /images/20220125/29124d8334544996bf1bd2f7f8c2dc07.png