Linux Networking & SSH Tutorial: Remote Access, SCP & Port Management | DevOps Essential
Master Linux networking and secure remote access with SSH in this comprehensive tutorial for DevOps and Cloud Engineers. Learn essential networking concepts, SSH configuration, and file transfer commands for production environments.
What You'll Learn in This Video:
Basic networking concepts: IP addresses, subnet masks, gateways, DNS, ports, localhost
Common network ports: SSH (22), HTTP (80), HTTPS (443)
Checking network configuration: ip addr show, ip route show, hostname
Viewing DNS servers with /etc/resolv.conf
Network testing commands: ping, traceroute, nslookup, dig, curl
Understanding SSH: Secure Shell encrypted remote access protocol
SSH replaces insecure Telnet with strong encryption
SSH authentication methods: password and key-based
Connecting to remote servers with ssh user@hostname
Custom SSH ports with -p flag
Running remote commands without interactive session
SSH key authentication: generating key pairs with ssh-keygen
Public and private key concepts
Copying SSH keys with ssh-copy-id
SSH config file for host shortcuts and aliases
Secure file transfer with scp command
Uploading and downloading files with scp
Recursive directory copying with scp -r
Efficient file synchronization with rsync
Port checking: netstat, ss, lsof commands
Testing port connectivity with telnet and netcat
Real-world troubleshooting: SSH connection issues, DNS problems, slow connections, blocked ports
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🏁 Timestamp:
0:00 Introduction
0:30 Basic Networking Concepts
3:00 Checking Network Configuration
5:30 Network Testing Commands
8:00 Understanding SSH
10:30 Connecting with SSH
13:00 SSH Key Authentication
16:00 SSH Configuration
18:00 Secure Copy and File Transfer
20:30 Port Checking and Services
22:30 Real-World Networking Scenarios
24:30 Practice Challenge
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