Linux常用配置及操作

一、网络配置

CentOS：

vi /etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE=eth0
BOOTPROTO=none
ONBOOT=yes
IPADDR=192.168.1.100
NETMASK=255.255.255.0
GATEWAY=192.168.1.1
DNS1=8.8.8.8
DNS2=8.8.4.4

Ubuntu

ubuntu配置网络使用netplan方式

vi /etc/netplan/01-netcfg.yaml

network:
  version: 2
  ethernets:
    eth0:
      dhcp4: no
      addresses: [192.168.1.100/24]
      gateway4: 192.168.1.1
      nameservers:
        addresses: [8.8.8.8, 8.8.4.4]

二、防火墙及Selinux

在测试环境中，防火墙和Selinux一般都会处于关闭状态

# 关闭防火墙及取消开机自启
systemctl stop firewalld 
systemctl disable firewalld 

# 临时及永久关闭Selinux
sudo sed -i 's/SELINUX=enforcing/SELINUX=permissive/g' /etc/selinux/config
setenforce 0
getenforce

三、镜像源配置

CentOS7

# 将原有镜像源进行备份，使用curl下载阿里镜像源
mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.bak
curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
curl -o /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo

yum clean all
yum makecache
yum update

Ubuntu20.04

cat >  /etc/apt/source.list << EOF
deb http://mirrors.aliyun.com/ubuntu/ focal main restricted
deb http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted
deb http://mirrors.aliyun.com/ubuntu/ focal universe
deb http://mirrors.aliyun.com/ubuntu/ focal-updates universe
deb http://mirrors.aliyun.com/ubuntu/ focal multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-updates multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-security main restricted
deb http://mirrors.aliyun.com/ubuntu/ focal-security universe
deb http://mirrors.aliyun.com/ubuntu/ focal-security multiverse
EOF

sudo  apt update
sudo  apt upgrade

四、修改系统时区及时间同步

sudo timedatectl set-timezone Asia/Shanghai
yum  install -y ntpdate
ntpdate cn.pool.ntp.org

持续记录中。。。