1. arpwatch – Ethernet Activity Monitor.

  2. bmon – bandwidth monitor and rate estimator.

  3. bwm-ng – live network bandwidth monitor.

  4. curl – transferring data with URLs.

  5. darkstat – captures network traffic, usage statistics.

  6. dhclient – Dynamic Host Configuration Protocol Client

  7. dig – query DNS servers for information.

  8. dstat – replacement for vmstat, iostat, mpstat, netstat and ifstat.

  9. ethtool – utility for controlling network drivers and hardware.

  10. ftp – simplest file transfer protocol.

  11. gated – gateway routing daemon.

  12. host – DNS lookup utility.

  13. hping – TCP/IP packet assembler/analyzer.

  14. ibmonitor – shows bandwidth and total data transferred.

  15. ifstat – report network interfaces bandwidth.

  16. iftop – display bandwidth usage.

  17. ip (PDF file) – a command with more features that ifconfig (net-tools).

  18. iperf3 – network bandwidth measurement tool. (above screenshot Stacklinux VPS)

  19. iproute2 – collection of utilities for controlling TCP/IP.

  20. IPTraf – An IP Network Monitor.

  21. iputils – set of small useful utilities for Linux networking.

  22. jwhois (whois) – client for the whois service.

  23. mtr – network diagnostic tool.

  24. net-tools – utilities include: arp, hostname, ifconfig, netstat, rarp, route, plipconfig, slattach, mii-tool, iptunnel and ipmaddr.

  25. ncat – improved re-implementation of the venerable netcat.

  26. netcat – networking utility for reading/writing network connections.

  27. nethogs – a small ‘net top’ tool.

  28. Netperf – Network bandwidth Testing.

  29. netsniff-ng – Swiss army knife for daily Linux network plumbing.

  30. netstat – Print network connections, routing tables, statistics, etc.

  31. netwatch – monitoring Network Connections.

  32. nload – display network usage.

  33. nmap – network discovery and security auditing.

  34. nslookup – query Internet name servers interactively.

  35. ping – send icmp echo_request to network hosts.

  36. route – show / manipulate the IP routing table.

  37. slurm – network load monitor.

  38. smokeping – keeps track of your network latency.

  39. speedometer – Measure and display the rate of data across a network.

  40. speedtest-cli – test internet bandwidth using speedtest.net

  41. ss – utility to investigate sockets.

  42. ssh – secure system administration and file transfers over insecure networks.

  43. tcpdump – command-line packet analyzer.

  44. tcptrack – Displays information about tcp connections on a network interface.

  45. telnet – user interface to the TELNET protocol.

  46. tracepath – very similar function to traceroute.

  47. traceroute – print the route packets trace to network host.

  48. vnStat – network traffic monitor.

  49. wget – retrieving files using HTTP, HTTPS, FTP and FTPS.

  50. Wireless Tools for Linux – includes iwconfig, iwlist, iwspy, iwpriv and ifrename.

  51. Wireshark – network protocol analyzer.