Linux Learnning

1. what is the IP address and network card

a. network card is a kind of hardware device that have the duty to make computer communite each other.

b. IP is the address inseted int he network

if the phone is computer, network card is like SIM card, and the IP is like phone number.

the name of netwrok card is just a mark and not the key ,and the key is the cooresponding address !

2. ifconfig and ping
ifconfig order / command is used for checking and config the configeration information of netwrok card.

ifconfig | grep inet (give the )
ping check the connection to the target IP address,

ping IP address / ping 127.0.01 (check local nerwork card)

SSH /SCP

Data transmission is encrypted to prevent information leakage.

Data transmission is compressed, which can improve transmission speed.

域名,端口号 IP address

域名是IP address 的别名,方便记忆 (www.itcast.cn

so, ping + domin name

send a data package with the 56 bytes, and receive 64 bytes from the other computer which you are commucate with the Ip addresss of 220.181.112.244, and cosuming time is "time = 2.08 ms"

端口号: 找到服务器上运行的应用程序

SSH: [-p port] user@remote

ssh -X (需要图传配置选项)

scp -P port file1 user@remote:

scp -P 22 -r user@remote:Desktop 复制文件夹

文件和文件夹的transmition direction is From firest file to secontd file.

相关推荐
Andy杨2 小时前
20250718-1-Kubernetes 应用程序生命周期管理-应用部署、升级、弹性_笔记
linux·docker·容器
2301_780789663 小时前
UDP和TCP的主要区别是什么
服务器·网络协议·web安全·网络安全·udp
写写闲篇儿5 小时前
Python+MongoDB高效开发组合
linux·python·mongodb
一个龙的传说6 小时前
linux 常用命令
linux·服务器·zookeeper
别致的影分身8 小时前
Docker 镜像原理
运维·docker·容器
庸子8 小时前
Ansible & AWX 自动化运维
运维·自动化·ansible
Ching·8 小时前
esp32使用ESP-IDF在Linux下的升级步骤,和遇到的坑Traceback (most recent call last):,及解决
linux·python·esp32·esp_idf升级
斯是 陋室8 小时前
在CentOS7.9服务器上安装.NET 8.0 SDK
运维·服务器·开发语言·c++·c#·云计算·.net
子柒s9 小时前
Linux 基础
linux