Commands tagged Network (129)

  • curl ifconfig.me/ip -> IP Adress curl ifconfig.me/host -> Remote Host curl ifconfig.me/ua ->User Agent curl ifconfig.me/port -> Port thonks to http://ifconfig.me/


    275
    curl ifconfig.me
    aajjk · 2010-04-21 13:10:33 57
  • Waiting for your server to finish rebooting? Issue the command above and you will hear a beep when it comes online. The -i 60 flag tells ping to wait for 60 seconds between ping, putting less strain on your system. Vary it to your need. The -a flag tells ping to include an audible bell in the output when a package is received (that is, when your server comes online).


    119
    ping -i 60 -a IP_address
    haivu · 2009-03-04 06:21:22 16

  • 100
    lsof -i
    hank · 2009-04-25 14:24:04 12
  • Redirect the local port 2000 to the remote port 3000. The same but UDP: nc -u -l -p 2000 -c "nc -u example.org 3000" It may be used to "convert" TCP client to UDP server (or viceversa): nc -l -p 2000 -c "nc -u example.org 3000"


    25
    nc -l -p 2000 -c "nc example.org 3000"
    prayer · 2009-03-01 21:28:39 7
  • this command will send a message to the socket 25 on host 192.168.1.2 in tcp. works on udp and icmp understand only IP address, not hostname. on the other side (192.168.1.2), you can listen to this socket and test if you receive the message. easy to diagnose a firewall problem or not.


    25
    echo "foo" > /dev/tcp/192.168.1.2/25
    mobidyc · 2009-09-12 16:48:05 9
  • Yeah I know it's been up here a million times, but this service is a really clean and nice one. Nothing but your IP address on it. Actually I was to write something like this, and noticed this on appspot... ;) Show Sample Output


    25
    curl ip.appspot.com
    ktoso · 2009-10-31 21:11:10 8
  • Works on any machine with nmap installed. Previous version does not work on machines without "seq". Also works on subnets of any size. Show Sample Output


    21
    nmap -sP 192.168.1.0/24
    sdadh01 · 2010-06-05 14:48:37 5

  • 21
    sudo tcpdump -i wlan0 -n ip | awk '{ print gensub(/(.*)\..*/,"\\1","g",$3), $4, gensub(/(.*)\..*/,"\\1","g",$5) }' | awk -F " > " '{print $1"\n"$2}'
    tweet78 · 2014-04-11 22:41:32 4
  • Where < target > may be a single IP, a hostname or a subnet -sS TCP SYN scanning (also known as half-open, or stealth scanning) -P0 option allows you to switch off ICMP pings. -sV option enables version detection -O flag attempt to identify the remote operating system Other option: -A option enables both OS fingerprinting and version detection -v use -v twice for more verbosity. nmap -sS -P0 -A -v < target >


    18
    nmap -sS -P0 -sV -O <target>
    starchox · 2009-02-18 07:32:03 9
  • Just a simple way without the need of additional tools. Of course, replace eth0 with your IF. Show Sample Output


    15
    while [ /bin/true ]; do OLD=$NEW; NEW=`cat /proc/net/dev | grep eth0 | tr -s ' ' | cut -d' ' -f "3 11"`; echo $NEW $OLD | awk '{printf("\rin: % 9.2g\t\tout: % 9.2g", ($1-$3)/1024, ($2-$4)/1024)}'; sleep 1; done
    hons · 2011-03-22 10:02:23 5
  • works on Linux and Solaris. I think it will work on nearly all *nix-es Show Sample Output


    13
    ifconfig -a | perl -nle'/(\d+\.\d+\.\d+\.\d+)/ && print $1'
    sneaker · 2009-07-31 09:49:17 6
  • Get all the networking related commands for your distro Show Sample Output


    13
    apropos network |more
    shaiss · 2009-09-25 15:05:33 7
  • Curl is not installed by default on many common distros anymore. wget always is :) wget -qO- ifconfig.me/ip


    12
    wget -qO- icanhazip.com
    SuperJediWombat · 2010-06-24 03:49:14 6

  • 11
    curl ifconfig.me
    dpoblador · 2010-10-09 08:12:26 2
  • The report mode of mtr produces a text formated result of the mtr run using the number of ping cycles stated by the command. This text file could then be attached to an email with ease. I use this also without the ">" portion when writing email from within mutt using VI from the command mode with ":r !mtr --report --report-cycles 10 Show Sample Output


    10
    mtr --report --report-cycles 10 www.google.com > google_net_report.txt
    CafeNinja · 2009-04-10 07:57:44 4

  • 9
    curl -s 'http://checkip.dyndns.org' | sed 's/.*Current IP Address: \([0-9\.]*\).*/\1/g'
    kulor · 2009-08-06 11:54:31 7
  • Gets all kind of info, ifconfig.me rocks ... for just the ip addess you can use ifconfig.me or ifconfig.me/ip Show Sample Output


    9
    curl ifconfig.me/all
    pykler · 2012-05-16 18:22:28 6

  • 8
    nc -l -p 2000 < song.mp3
    prayer · 2009-03-02 15:54:21 6
  • On the machine acting like a server, run: iperf -s On the machine acting like a client, run: iperf -c ip.add.re.ss where ip.add.re.ss is the ip or hostname of the server. Show Sample Output


    8
    iperf -s
    forcefsck · 2011-01-24 07:58:38 7
  • Trickle is a voluntary, cooperative bandwidth shaper. it works entirely in userland and is very easy to use. The most simple application is to limit the bandwidth usage of programs.


    7
    trickle -d 60 wget http://very.big/file
    point_to_null · 2010-03-29 06:55:30 2
  • I'd rather this one on Gnome, as I'm used to be listening some music while working. I've even created a bash function which receives ADDRESS as parameter.


    7
    until ping -c1 ADDRESS;do true;done;zenity --warning --text "ADDRESS is back"
    marcusrp · 2011-09-26 18:51:38 5
  • Replace 500ms by the desired delay. To remove it: sudo tc qdisc del dev lo root netem delay 500ms


    7
    sudo tc qdisc add dev lo root netem delay 500ms
    caiosba · 2012-11-05 05:29:51 2
  • It finds, specifically, the connections to the HTTP and HTTPS ports as source ports. You can check for destination ports as well. Show Sample Output


    7
    ss -o state established '( dport = :http or sport = :https )'
    renich · 2019-08-14 17:28:13 28
  • To connect to the shell run: nc server.example.org 2000


    6
    nc -l -p 2000 -e /bin/bash
    prayer · 2009-03-02 15:58:25 6

  • 5
    mii-tool [if]
    raphink · 2009-02-25 23:55:00 3
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Conficker Detection with NMAP

Serial console to a Vmware VM
Create a serial console with "socket (named pipe)" of "/tmp/socket", "from:server, to:virtual machine" in vmware player, etc.. gui. Run the above command after you have booted the guest OS (which should also be configured for serial console).

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Recursive search inside the content of files under current directory - then view the result paginated with 'less'
This command will traverse all of the folders and subfolders under current working directory. For every file inside it, it will do a search inside the content of the file for a specific term 'what'. Then it will print a list of the lines that contain that term (and match that pattern). Each matching line will be preceded with the path and name to the file and then the line number iside taht file wehre the pattern was found. Then the actual content of the matching lien will be printed. The output will be piped throug less, so that the user can scroll through it if it goes beyond the limits of the current display window.


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