Network-related concepts, modifying IP, firewalls and ports-turn off SELinux

En means ethernet, which is LAN

O: Motherboard Onboard Network

P: Standalone NIC

S: Hot-swappable NIC

Temporarily modify IP

ifconfig nic name (ENS33) IP (192.168.1.110)

Systemctl Restart network//restart NIC Service

Ifconfig nic name (ENS33) del IP (192.168.1.110)//Temporary Delete

Permanently modify IP

Systemctl status NetworkManager #网卡状态 Active (running) run

Ls/etc/sysconfig/network-scripts/ifcfg-lo #网卡回环地址

Cat/etc/resolv.conf #DNS

Cat/etc/hostfs #设置主机名和IP绑定信息

Cat/etc/hostname #设置主机名

Permanently modify the network card address

1. Nmtui---> edit a connection-- OK //edit

2. vim/etc/sysconfig/network-scripts/ifcfg-ens33//config file modify ipaddr= IP address

Firewall and Port Firewalld

View status: Systemctl status firewalld start: Systemctl start firewalld Disabled: Systemctl stop FIREWALLD stop: systemctl disable F Irewalld #开机自动关闭

Temporarily (permanently) close SELinux

Getenforce # View the status of SELinux.

Enforcing boot Setenforce 0 indicates a temporary shutdown of the SELinux firewall

Disabled boot does not start

Vim/etc/selinux/config//Edit file permanently closed

Reboot Restart Service

CD-ROM boot automatically mount

Vim/etc/fstab

Network-related concepts, modifying IP, firewalls and ports-turn off SELinux