Kompyuterlar Qanday Do'stlashadi?

import socket
s = socket.socket()          # 1. trubka olamiz
s.bind(("0.0.0.0", 5000))     # 2. raqam olamiz
s.listen()                   # 3. qo'ng'iroq kutamiz
c, addr = s.accept()         # 4. trubkani ko'taramiz
c.send(b"Salom, do'stim!")  # 5. gaplashamiz
c.close()                    # 6. xayr!

s = socket.socket()
s.connect(("127.0.0.1", 5000))  # qo'ng'iroq!
print(s.recv(1024))              # "Salom, do'stim!"

$ ip -br a                # qisqa ko'rinish
lo      UNKNOWN  127.0.0.1/8
wlan0   UP       192.168.1.23/24

$ ip link                 # eshiklar va MAC
$ ip route                # yo'l xaritasi
$ ip neigh                # qo'shnilar (ARP)

# ⚠️ quyidagilar uchun admin (sudo) kerak:
$ sudo ip link set eth0 down   # eshikni yopish
$ sudo ip link set eth0 up     # eshikni ochish
$ sudo ip addr add 192.168.1.50/24 dev eth0

$ sudo ss -tulnp      # kim qo'ng'iroq kutyapti?
Netid State  Local Address:Port  Process
tcp   LISTEN 0.0.0.0:22          sshd
tcp   LISTEN 127.0.0.1:5432      postgres
udp   UNCONN 0.0.0.0:68          dhclient

$ ss -tn              # hozirgi suhbatlar
ESTAB  192.168.1.23:51234  142.250.74.46:443

$ sudo ufw default deny incoming  # begonalarga yo'q
$ sudo ufw default allow outgoing # o'zimizga ha
$ sudo ufw allow 22/tcp          # SSH ga ruxsat
$ sudo ufw allow 80,443/tcp      # sayt uchun
$ sudo ufw enable                # qorovul, ishga!
$ sudo ufw status
To          Action   From
22/tcp      ALLOW    Anywhere
80,443/tcp  ALLOW    Anywhere

$ ssh ali@192.168.1.50          # teleport!

# 🗝️ kalit juftligini yasash
$ ssh-keygen -t ed25519
$ ssh-copy-id ali@192.168.1.50  # qulfni o'rnatish

# 📁 fayllarni yuborish
$ scp rasm.png ali@192.168.1.50:/home/ali/
$ rsync -av loyiha/ ali@192.168.1.50:/backup/
#   rsync faqat o'zgargan qismlarni yuboradi ⚡
$ sftp ali@192.168.1.50         # fayl "do'koni"