Commands tagged ip address

With a lolcat favicon if you access it from your browser

Works on any machine with nmap installed. Previous version does not work on machines without "seq".

Also works on subnets of any size.

Extracts ip addressess from file using sed. Uses a tag(ip) to grep the IP lines after extracting. Must be a way to just output regex matched on sed.

This is useful when you got a reserved IP address like 192.168.0.100 and want to find out what IP address is used to access the Internet. You have to know a server with 'efingerd -n' configured, like www.linuxbanks.cn as above.

Other method to find out this information are for example access www.tell-my-ip.com and grep the output. The finger method have the advantage that it is easy to deploy a service like www.tell-my-ip.com, as you only need to get efingerd installed.

Request all information about my IP address in json format

Request all information about my IP address in xml format

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/

Taking file with ip ranges, each on it's own line like:

213.87.86.160-213.87.86.193

213.87.87.0-213.87.88.255

91.135.210.0-91.135.210.255

command returns deaggregated ip ranges using ipcalc deaggregate feature like that:

213.87.86.160/27

213.87.86.192/31

213.87.87.0/24

213.87.88.0/24

91.135.210.0/24

Useful for configuring nginx geo module

You send a unicast ICMP packet to each host. Many firewalls will drop that ICMP. However, in order to send the ICMP, you'll have first done an ARP request and the remote machine is unlikely to ignore that, so the computer will be in your ARP table.

should be very consistent cause it's google :-)

Get your external ip adress thanks to http://www.icanhazip.com

Instead of opening your browser, googling "whatismyip"...

Also useful for scripts.

dig can be found in the dnsutils package.

ifconfig is dead, long-live iproute2

this also uses only awk to do the grepping and removal of CIDR notation

Prints the unique IP Addresses as they arrive from an Apache `access.log` file.

The '-W interactive' tells awk to start writing to stdout immediately and not buffer the output.

This command builds on the uniq lines without sorting command (http://www.commandlinefu.com/commands/view/4389/remove-duplicate-entries-in-a-file-without-sorting.)

Allows to add more than one ip address to one network device.

Requires Python; doesn't require a specific server to return your IP.

Thanks to comment if that works or not...

If you have already typed that snippet or you know you already have IO::Interface::Simple perl module, you can type only the last command :

( The first perl command will install the module if it's not there already... )

Like the tiltle said, you can use an argument too ( the interface )

will show only the IP of this interface and the public IP

( tested with Linux )

You can add that function in ~/.bashrc, then

Now you are ready to call this function in all your terms...

If you are interested in interfaces other than eth0 you will need to change eth0 to your interface name.

You could use this mammoth to nab the ip4 addresses of all your interfaces

perl -e '@_=`ifconfig -a`; sort(@_); foreach(@_) { /(inet addr\:)(\d+.\d+.\d+.\d+ )/; $_=$2; @uniq=grep($_ ne $prev && (($prev) = $_), @_);} print join "\n",@uniq,"\n"; '

it seems silly to have all this code when the following will work fine

ifconfig -a | grep "inet " | awk -F":" ' { print $2 } ' | cut -d " " -f1