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Linux networking commands that every sysadmin should know: 
1. arp - manipulate the system ARP cache
2. aria2 – downloading just about everything. Torrents included.
3. arpwatch – Ethernet Activity Monitor.
5. bmon – bandwidth monitor and rate estimator.
6. bwm-ng – live network bandwidth monitor.
2. aria2 – downloading just about everything. Torrents included.
3. arpwatch – Ethernet Activity Monitor.
5. bmon – bandwidth monitor and rate estimator.
6. bwm-ng – live network bandwidth monitor.
7. curl – transferring data from or to a server.
8. darkstat – captures network traffic, usage statistics.
9. dhclient – Dynamic Host Configuration Protocol Client.
10. dig – a flexible tool for interrogating DNS name servers.
8. darkstat – captures network traffic, usage statistics.
9. dhclient – Dynamic Host Configuration Protocol Client.
10. dig – a flexible tool for interrogating DNS name servers.
14. host – a simple utility for performing DNS lookups. It is normally used to convert names
to IP addresses and vice versa.
to IP addresses and vice versa.
15. hping3 – send custom TCP/IP packets and to display target replies like ping program does with ICMP replies.
16. ping - used to check for connectivity between end hosts
16. ping - used to check for connectivity between end hosts
17. fping - like ping, but fping differs from ping in that you can specify any number of targets on the command line, or specify a file containing the lists of targets to ping.
18. ibmonitor – shows bandwidth and total data transferred.
19. ifstat – report network interfaces bandwidth.
20. iftop – display bandwidth usage.
21. ip – show or manipulate routing, network devices, interfaces and tunnels. ip command has more features than ifconfig.
19. ifstat – report network interfaces bandwidth.
20. iftop – display bandwidth usage.
21. ip – show or manipulate routing, network devices, interfaces and tunnels. ip command has more features than ifconfig.
22. iperf3 – network bandwidth measurement tool.
23. iproute2 – collection of utilities for controlling TCP/IP.
24.iptables / ip6tables — administration tool for IPv4/IPv6 packet filtering and NAT.
25. IPTraf – An IP Network Monitor.
23. iproute2 – collection of utilities for controlling TCP/IP.
24.iptables / ip6tables — administration tool for IPv4/IPv6 packet filtering and NAT.
25. IPTraf – An IP Network Monitor.
26. iputils – set of small useful utilities for Linux networking.
27. iw – a new nl80211 based CLI configuration utility for wireless devices.
27. iw – a new nl80211 based CLI configuration utility for wireless devices.
28. jwhois (whois) – searches Whois servers for the object on the command line.
29. lsof -i – reveal information about your network sockets.
29. lsof -i – reveal information about your network sockets.
30. mtr – network diagnostic tool.
31. net-tools – utilities include: arp, hostname, ifconfig, netstat, rarp, route, plipconfig, slattach, mii-tool, iptunnel and ipmaddr.
32. hostname - show or set the system's host name.
33. rarp - manipulate the system RARP table.
31. net-tools – utilities include: arp, hostname, ifconfig, netstat, rarp, route, plipconfig, slattach, mii-tool, iptunnel and ipmaddr.
32. hostname - show or set the system's host name.
33. rarp - manipulate the system RARP table.
34. route - show or manipulate the IP routing table.
35. iptunnel - create and manage IP tunnels.
36. slattach - attach a network interface to a serial line.
37. mii-tool - view, manipulate media-independent interface status
35. iptunnel - create and manage IP tunnels.
36. slattach - attach a network interface to a serial line.
37. mii-tool - view, manipulate media-independent interface status
38. netstat - print network connections, routing tables, interface statistics, masquerade connections, and multicast memberships.
39. ipmaddr - adds, changes, deletes, and displays multicast
addresses.
40. plipconfig - fine tune PLIP device parameters.
39. ipmaddr - adds, changes, deletes, and displays multicast
addresses.
40. plipconfig - fine tune PLIP device parameters.
41. ncat or nc –command-line tool for reading, writing, redirecting, and encrypting data across a network
42. netcat – networking utility for reading/writing network connections.
43. nethogs – a small ‘net top’ tool.
44. Netperf – Network bandwidth Testing.
42. netcat – networking utility for reading/writing network connections.
43. nethogs – a small ‘net top’ tool.
44. Netperf – Network bandwidth Testing.
45. netplan – Netplan is a utility for easily configuring networking on a linux system.
46. netsniff-ng – Swiss army knife for daily Linux network plumbing.
47, netwatch – monitoring Network Connections.
46. netsniff-ng – Swiss army knife for daily Linux network plumbing.
47, netwatch – monitoring Network Connections.
48. ngrep – grep applied to the network layer. It allow you to specify extended regular expressions to match against data payloads of packets.
49. nload – display network usage.
50. nmap – network discovery and security auditing.
49. nload – display network usage.
50. nmap – network discovery and security auditing.
51. nmcli – a command-line tool for controlling NetworkManager and reporting network status.
52. nmtui – provides a text interface to configure networking by controlling NetworkManager.
52. nmtui – provides a text interface to configure networking by controlling NetworkManager.
53. nslookup – query Internet name servers interactively.
54. slurm – network load monitor.
56. snort – Network Intrusion Detection and Prevention System.
57. smokeping – keeps track of your network latency.
54. slurm – network load monitor.
56. snort – Network Intrusion Detection and Prevention System.
57. smokeping – keeps track of your network latency.
58. socat – establishes two bidirectional byte streams and transfers data between them.
59. speedometer – Measure and display the rate of data across a network.
60. speedtest-cli – test internet bandwidth using speedtest.net
61. ss – utility to investigate sockets.
59. speedometer – Measure and display the rate of data across a network.
60. speedtest-cli – test internet bandwidth using speedtest.net
61. ss – utility to investigate sockets.
62. ssh – secure system administration and file transfers over insecure networks.
63. tcpdump – command-line packet analyzer.
64. tcptrack – Displays information about tcp connections on a network interface.
65. telnet – user interface to the TELNET protocol.
63. tcpdump – command-line packet analyzer.
64. tcptrack – Displays information about tcp connections on a network interface.
65. telnet – user interface to the TELNET protocol.
66. ftp - allows a user to transfer files to and from a remote network site.
67. scp - copies files between hosts on a network.
68. rsync - a fast, versatile, remote (and local) file-copying tool.
69. tracepath – very similar function to traceroute.
67. scp - copies files between hosts on a network.
68. rsync - a fast, versatile, remote (and local) file-copying tool.
69. tracepath – very similar function to traceroute.
70. traceroute – print the route packets trace to network host.
71. vnStat – network traffic monitor.
72. websocat – Connection forwarder from/to web sockets to/from usual sockets, in style of socat.
71. vnStat – network traffic monitor.
72. websocat – Connection forwarder from/to web sockets to/from usual sockets, in style of socat.
73. wget – retrieving files using HTTP, HTTPS, FTP and FTPS.
74. Wireshark – network protocol analyzer.
74. Wireshark – network protocol analyzer.
75. ifup - bring a network interface up.
76. ifdown - take a network interface down.
77. ifquery - parse interface configuration.
76. ifdown - take a network interface down.
77. ifquery - parse interface configuration.
78. UFW (Uncomplicated Firewall)- used to enable/disable system firewall, add/delete/modify/reset packet filtering rules, and much more.
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