liunx基础命令讲解

一.基础环境：

实验环境

1.本机为桌面安装

2.网络模式为nat ip：172.20.10.8

基础环境

1.可以ping通网络及网络设置

2.挂载镜像，及配置yum源仓库

最小安装需下载依赖环境

[[email protected] ~]#yum -y install wget.x86_64

[[email protected] ~]#yum -y install vim

[[email protected] ~]#yum -y install bash-completion

[[email protected] ~]#bash

二.安装Mysql并配置

1.检查基础环境是否预留mysql或mariadb的包：

查询是否安装了MySQL了

[[email protected]]# cd /etc/yum.repos.d

[[email protected] yum.repos.d]# rpm -qa | grep mysql

[[email protected] yum.repos.d]# rpm -qa | grep mariadb mariadb-libs-5.5.68-1.el7.x86_64

#强制卸载mariadb-lib

[[email protected] yum.repos.d]# rpm -e --nodeps mariadb-libs

[[email protected] yum.repos.d]# rpm -qa | grep mariadb

#安装mysql数据库

[[email protected] yum.repos.d]# wget https://dev.mysql.com/get/mysql80-community-release-el7-5.noarch.rpm #从网上获取mysql.rpm包

#安装rpm包

[[email protected] yum.repos.d]# rpm -ivh mysql80-community-release-el7-5.noarch.rpm

#清空缓存

[[email protected] ~ yum.repos.d]# yum makecache fast [[email protected] ~yum.repos.d]# yum repolist

2.安装mysql数据库及登录，修改密码

[[email protected] yum.repos.d]# yum -y install mysql-community-server

[[email protected] yum.repos.d]# grep "passwor" /var/log/mysqld.log 2022-04-15T01:10:12.626454Z 6 [Note] [MY-010454] [Server] A temporary password is generated for [email protected]: RbSv)lzrG6ts [[email protected] yum.repos.d]# mysql -u root -p Enter password: mysql> set password='[email protected]liu0301'; Query OK, 0 rows affected (0.00 sec) mysql> exit Bye

3.设置允许远程访问

[[email protected] ~]systemctl stop firewalld.service

[[email protected] ~]systemctl disable firewalld.service

4.修改mysql权限允许任何人连接

[[email protected] yum.repos.d]# mysql -u root -p Enter password: mysql> use mysql; Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Database changed mysql> select Host,User from user; +-----------+------------------+ | Host | User | +-----------+------------------+ | localhost | mysql.infoschema | | localhost | mysql.session | | localhost | mysql.sys | | localhost | root | +-----------+------------------+ 4 rows in set (0.00 sec) mysql> update user set Host='%' where User='root'; Query OK, 1 row affected (0.00 sec) Rows matched: 1 Changed: 1 Warnings: 0 mysql> flush privileges; Query OK, 0 rows affected (0.01 sec) mysql> exit Bye

5.使用连接工具:使用Navicat连接工具测试

新建---mysql 注：密码为数据库密码 主机为虚拟机ip地址(密码要手动输入）