Here are the 50 practical scenarios on how to manage networking in Linux:
Network Configuration:
1. Display the current network configuration using `ifconfig` or `ip`.
2. Set a static IP address on an interface.
3. Configure a system to obtain an IP address via DHCP.
4. Add a default gateway to the routing table.
5. Add a DNS server to the resolver configuration.
6. View and modify the hostname of the system.
7. Set up a network bond with two network interfaces.
8. Configure a system to use a specific DNS server.
9. Create and configure a network bridge.
Network Diagnostics:
10. Check network connectivity to a remote host using `ping`.
11. Perform a DNS lookup for a domain name using `nslookup`.
12. Display routing information using `netstat` or `ip route`.
13. Identify open network ports using `netstat` or `ss`.
14. Perform a trace route to a remote host using `traceroute`.
15. Check for DNS resolution issues using `dig`.
Firewall and Security:
16. List active firewall rules using `iptables` or `firewalld`.
17. Add a rule to allow incoming SSH traffic in the firewall.
18. Block specific IP addresses using firewall rules.
19. Enable or disable the firewall service.
20. Implement Network Address Translation (NAT) using `iptables`.
21. Set up a basic intrusion detection system (IDS).
Network Services:
22. Start, stop, and restart the Apache web server.
23. Configure Apache to serve a new virtual host.
24. Check the status of the Apache web server.
25. Enable or disable the Apache service to start at boot.
26. Install and configure the Nginx web server.
27. Configure Nginx to serve a secure website using SSL/TLS.
28. Start and enable the SSH service.
29. Set up an SSH key-based authentication for a user.
30. Configure the SSH service to use a non-default port.
Network Interfaces:
31. List all available network interfaces using `ifconfig` or `ip`.
32. Bring up a network interface using `ifup` or `ip link set`.
33. Take down a network interface using `ifdown` or `ip link set`.
34. Modify the MTU (Maximum Transmission Unit) of a network interface.
35. Change the MAC address of a network interface.
36. Add an additional IP address to a network interface.
Networking Tools:
37. Use `netcat` for basic network troubleshooting.
38. Capture network packets using `tcpdump` or `wireshark`.
39. Configure a system to use a proxy server.
40. Perform bandwidth testing using `iperf` or `speedtest-cli`.
41. Set up and use a VPN client to connect to a remote server.
42. Install and configure a network time server (NTP).
43. Use the `ssh` command to securely access a remote system.
44. Create and use an SSH tunnel for secure remote access.
45. Manage wireless networks using `iw` or `nmcli`.
DNS and DHCP:
46. Configure a system as a DNS server using BIND.
47. Set up a DHCP server to assign IP addresses dynamically.
48. Create a custom DNS zone file and configure DNS records.
49. Use `nslookup` to query DNS records.
50. Flush the DNS cache on a Linux system.
Note:
These scenarios cover a broad range of tasks related to managing networking in Linux. Practice these tasks on a Linux-based system to become proficient in networking administration.
