CentOS学习笔记

centos7 查看开启 IP

# 查看
ip addr

# 如果ens33没有inet这个属性 则需要开启
vi /etc/sysconfig/network-scripts/ifcfg-ens33 # 设置ONBOOT=yes

# 重启网络服务
service network restart

# 查看
ip addr

centos7关闭防火墙

# 查看防火墙状态 绿的running表示防火墙开启
systemctl status firewalld.service
# 执行关闭命令
systemctl stop firewalld.service
# 执行开机禁用防火墙自启命令
systemctl disable firewalld.service

常用操作

# 查看主机名
hostnamectl status

# 修改主机名
hostnamectl set-hostname <name>

yum常用操作

# 更新软件包缓存
sudo yum makecache

# 更新
yum update

# 显示系统中已经安装过的包
yum list installed

centos7 配置清华源镜像

# 备份
sudo cp /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.bak

# 修改CentOS-Base.repo参照下面文件内容
sudo vi /etc/yum.repos.d/CentOS-Base.repo

# 更新软件包缓存
sudo yum makecache

# CentOS-Base.repo
#
# The mirror system uses the connecting IP address of the client and the
# update status of each mirror to pick mirrors that are updated to and
# geographically close to the client.  You should use this for CentOS updates
# unless you are manually picking other mirrors.
#
# If the mirrorlist= does not work for you, as a fall back you can try the
# remarked out baseurl= line instead.
#
#


[base]
name=CentOS-$releasever - Base
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/os/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-7

#released updates
[updates]
name=CentOS-$releasever - Updates
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/updates/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-7



#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/extras/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-7



#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/centosplus/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-7

yum安装软件报错：获取GPG密钥失败

rpm --import /etc/pki/rpm-gpg/RPM*

centos7 安装 vim

sudo yum install vim*

centos7安装net-tools

sudo yum install -y net-tools

centos安装wget

yum -y install wget

centos7安装openjdk

# 查看可用的JDK软件包列表
yum search java | grep -i --color JDK

# 安装
yum install java-1.8.0-openjdk.x86_64

centos7 安装 pgsql12

# 安装rpm
sudo yum install -y https://download.postgresql.org/pub/repos/yum/reporpms/EL-7-x86_64/pgdg-redhat-repo-latest.noarch.rpm

# 安装server
sudo yum install -y postgresql12-server

# 初始化
sudo /usr/pgsql-12/bin/postgresql-12-setup initdb

# 设置开机自启动
sudo systemctl enable postgresql-12

# 启动服务
sudo systemctl start postgresql-12

centos7安装mysql8

# 下载源
wget https://dev.mysql.com/get/mysql80-community-release-el7-3.noarch.rpm

# 安装源
yum localinstall  mysql80-community-release-el7-3.noarch.rpm

# 检查是否安装成功
yum repolist enabled | grep "mysql.*-community.*"

# 安装
yum install mysql-community-client mysql-community-server