Commands tagged IP sorted by votes

Commands tagged IP (80)

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Get all interfaces name

Show Sample Output
This is sample output - yours may be different.
```
lo
eno1
wlp0s29u1u5
```
0

ip addr | sed '/^[0-9]/!d;s/: <.*$//;s/^[0-9]: //'

bonaff · 2015-04-12 12:58:56 9
automatically generate the ip/hostname entry for the /etc/hosts in the current system

I use it after a clean CentOS 7 minimal server installation to automatically populate the /etc/hosts file. Not sure why the installation does not add this entry by itself. Tested on CentOS 7 with the simplest use case: 1 static ip address and the hostname provided during installation. Show Sample Output
This is sample output - yours may be different.
```
[root@dns-server ~]# echo "$(ip addr show dev $(ip r | grep -oP 'default.*dev \K\S*') | grep -oP '(?<=inet )[^/]*(?=/)') $(hostname -f) $(hostname -s)"
10.0.2.10 dns-server.mydomain.lab dns-server

[root@dns-server ~]# echo "$(ip addr show dev $(ip r | grep -oP 'default.*dev \K\S*') | grep -oP '(?<=inet )[^/]*(?=/)') $(hostname -f) $(hostname -s)" >> /etc/hosts

[root@dns-server ~]# cat /etc/hosts
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
10.0.2.10 dns-server.mydomain.lab dns-server
```
0

echo "$(ip addr show dev $(ip r | grep -oP 'default.*dev \K\S*') | grep -oP '(?<=inet )[^/]*(?=/)') $(hostname -f) $(hostname -s)"

acavagni · 2019-06-15 16:40:38 42
regex to match an ip

if you want to only print the IP address from a file. In this case the file will be called "iplist" with a line like "ip address 1.1.1.1" it will only print the "1.1.1.1" portion
This is sample output - yours may be different.
-1

perl -wlne 'print $1 if /(([01]?\d\d?|2[0-4]\d|25[0-5])\.([01]?\d\d?|2[0-4]\d|25[0-5])\.([01]?\d\d?|2[0-4]\d|25[0-5])\.([01]?\d\d?|2[0-4]\d|25[0-5]))/' iplist

salparadise · 2009-09-17 16:14:52 3
regex to match an ip

Handles everything except octets with 255. Ran through ip generator with variable octet lengths.
This is sample output - yours may be different.
-1

echo 127.0.0.1 | egrep -e '^(([01]?[0-9]{1,2}|2[0-4][0-9]|25[0-4])\.){3}([01]?[0-9]{1,2}|2[0-4][0-9]|25[0-4])$'

arcege · 2009-09-17 17:40:48 3
Get your external IP address with the best commandlinefu.com command

This command uses the top voted "Get your external IP" command from commandlinefu.com to get your external IP address. Use this and you will always be using the communities favourite command. This is a tongue-in-cheek entry and not recommended for actual usage.
This is sample output - yours may be different.
-1

eval $(curl -s http://www.commandlinefu.com/commands/matching/external/ZXh0ZXJuYWw=/sort-by-votes/plaintext|sed -n '/^# Get your external IP address$/{n;p;q}')

jgc · 2009-11-04 16:58:31 6
Find default gateway

Find your default gateway and print it directly output. http://www.bayner.com/ kerim@bayner.com Show Sample Output
This is sample output - yours may be different.
```
192.168.1.1
```
-1

ip route show | awk '$3 ~ /^[1-9]+/ {print $3;}'

kerim · 2010-08-08 23:57:23 3
Find default gateway
This is sample output - yours may be different.
-1

route -n | grep "^0\." | awk '{print "Gateway to the World: "$2", via "$NF""}'

bandie91 · 2010-08-09 11:55:37 26
Get just the IP for a hostname

Get just the IP address for a given hostname. For best results, make this a function in your shell rc file so that it can be used for things like traceroute: Titus:~$ traceroute `getip foo.com` traceroute to 64.94.125.138 (64.94.125.138), 64 hops max, 52 byte packets Show Sample Output
This is sample output - yours may be different.
```
Titus:~$ host foo.com|grep "has address "|cut -d" " -f4
64.94.125.138
```
-1

host foo.com|grep " has address "|cut -d" " -f4

dinomite · 2010-10-29 17:01:37 4
Get just the IP for a hostname
This is sample output - yours may be different.
-1

gethostip -d hostname

ashayh · 2010-10-29 18:54:46 3
Get just the IP for a hostname
This is sample output - yours may be different.
-1

host google.com|awk '{print $NF}'

aitilang · 2010-11-03 11:15:30 3
IP address of current host

I've seen some versions of hostname that don't have the -i option, so this may not work everywhere. When available, it's a better alternative than using ifconfig and wasting eyeball muscle to search for the address, and it's definitely simpler than using awk/sed.
This is sample output - yours may be different.
-2

hostname -i

kFiddle · 2009-04-17 21:26:56 7
Read just the IP address of a device

Found this useful for scripts where I needed to work with the machine's IP. If $DEVICE is not specified, this will return all IPs on the machine. If $DEVICE is set to a network adapter, it will return just that adapter's IP.
This is sample output - yours may be different.
-2

ifconfig $DEVICE | perl -lne '/inet addr:([\d.]+)/ and print $1'

jdob · 2009-07-21 13:48:19 6
Read just the IP address of a device
This is sample output - yours may be different.
-2

/sbin/ifconfig eth0 | grep "inet addr" | sed -e 's/.*inet addr:$.*$ B.*/\1/g'

digitalmechanic · 2009-07-21 14:10:39 3
regex to match an ip

regex to match an ip Show Sample Output
This is sample output - yours may be different.
```
echo "23.23.12.24" | grep -P '([01]?\d?\d|2[0-4]\d|25[0-5])\.([01]?\d?\d|2[0-4]\d|25[0-5])\.([01]?\d?\d|2[0-4]\d|25[0-5])\.([01]?\d?\d|2[0-4]\d|25[0-5])'

23.23.12.24
```
-2

echo "123.32.12.134" | grep -P '([01]?\d\d?|2[0-4]\d|25[0-5])\.([01]?\d\d?|2[0-4]\d|25[0-5])\.([01]?\d\d?|2[0-4]\d|25[0-5])\.([01]?\d\d?|2[0-4]\d|25[0-5])'

KeePon · 2009-09-17 12:17:32 5
Find default gateway

Find your default gateway and print it directly output http://www.bilgisayarmatematik.com/ kerim@bayner.com Show Sample Output
This is sample output - yours may be different.
```
192.168.1.1
```
-2

route -n | awk '$2 ~/[1-9]+/ {print $2;}'

kerim · 2010-08-08 23:51:07 7
Get the IP address of a machine. Just the IP, no junk.
This is sample output - yours may be different.
-2

ifconfig -a | awk '/Bcast/{print $2}' | cut -c 5-19

BigCow · 2013-04-10 14:18:25 5
Get the IP address of a machine

No junk, no pipe, one command, no subcommand - KISS Show Sample Output
This is sample output - yours may be different.
```
192.168.1.0
```
-2

ifdata -pN eth0

unixmonkey45290 · 2013-04-12 15:05:36 7
Mac, ip, and hostname change - sweet!

The command above has been changed due to very good constructive criticism - thanks x 2! This command can be used after acquiring mac's, ip's and hostname's or any of the above from a freshly scanned LAN. User must be root, and remember to change your settings on your network managing software manually (Fedc10 NetworkManager Applet 0.7.1 is mine) instead of 'auto DHCP'. You can also substitute eth0 for wlan0 etc - be good and ENJOY!
This is sample output - yours may be different.
-3

ifconfig eth0 down hw ether (newmacaddresshere) && ifconfig eth0 up && ifconfig eth0 (newipaddresshere) netmask 255.255.255.0 up && /bin/hostname (newhostnamehere)

localGhost · 2009-06-04 20:25:49 9
Get internal and external IP addresses

Gets the internal and external IP addresses of all your interfaces, or the ones given as arguments Show Sample Output
This is sample output - yours may be different.
```
nathan@lion:~$ ips
lo   127.0.0.1      127.0.0.1
eth0 192.168.1.2    80.106.232.129
nathan@lion:~$ ips eth0
eth0 192.168.1.2    80.106.232.129
```
-3

ips(){ for if in ${1:-$(ip link list|grep '^.: '|cut -d\ -f2|cut -d: -f1)};do cur=$(ifconfig $if|grep "inet addr"|sed 's/.*inet addr:$[0-9\.]*$.*/\1/g');printf '%-5s%-15s%-15s\n' $if $cur $(nc -s $cur sine.cluenet.org 128 2>/dev/null||echo $cur);done;}

frozenfire · 2009-08-07 10:04:46 3
What is my ip?

The preferred way for scripts (and easier to parse) Show Sample Output
This is sample output - yours may be different.
```
my.own.ip.address
```
-3

alias whatismyip="wget -q -O - http://whatismyip.com/automation/n09230945.asp"

gibboris · 2009-10-30 15:42:52 4
Get your external IP address

bash neto..
This is sample output - yours may be different.
-3

exec 3<>/dev/tcp/whatismyip.com/80; echo -e "GET /automation/n09230945.asp HTTP/1.0\r\nHost: whatismyip.com\r\n" >&3; a=( $(cat <&3) ); echo ${a[${#a[*]}-1]};

yaccovs · 2009-11-03 21:57:00 6
Get your external IP address
This is sample output - yours may be different.
-3

curl whatismyip.org

m8t · 2009-11-04 21:40:31 3
Get the IP address of a machine. Just the IP, no junk.
This is sample output - yours may be different.
-3

ifconfig -a | awk '/Bcast/{print $2}' | cut -c 5-19

BigCow · 2013-04-10 14:18:47 5
Get your external IP address
This is sample output - yours may be different.
-4

echo -e "GET /automation/n09230945.asp HTTP/1.0\r\nHost: whatismyip.com\r\n" | nc whatismyip.com 80 | tail -n1

Marko · 2009-11-03 15:18:20 14
Get your external IP address
This is sample output - yours may be different.
-4

wget -q -O - checkip.dyndns.org|sed -e 's/.*Current IP Address: //' -e 's/<.*$//'

sanjaygoel · 2009-11-06 10:18:26 3
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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"

Show what PID is listening on port 80 on Linux

Convert seconds to [DD:][HH:]MM:SS

Converts any number of seconds into days, hours, minutes and seconds. sec2dhms() { declare -i SS="$1" D=$(( SS / 86400 )) H=$(( SS % 86400 / 3600 )) M=$(( SS % 3600 / 60 )) S=$(( SS % 60 )) [ "$D" -gt 0 ] && echo -n "${D}:" [ "$H" -gt 0 ] && printf "%02g:" "$H" printf "%02g:%02g\n" "$M" "$S" }

List all symbolic links in a directory matching a string

Finds all symbolic links in the specified directory which match the specified string pattern. I used this when upgrading from an Apple-supported version of Java 6 (1.6.0_65) to an Oracle-supported version (1.7.0_55) on Mac OS X 10.8.5 to find out which executables were pointing to /System/Library/Frameworks/JavaVM.framework/Versions/Current/Commands (Apple version) vs. /Library/Java/JavaVirtualMachines/jdk1.7.0_55.jdk/Contents/Home/bin (Oracle version). However, it appears the current JDK installation script already takes care of modifying the links.

The simplest way to transport information over a network

Einstein's razor: As simple as possible, but not simpler. On the destination machine netcat listens on any port (1234 in the example) and sends anything it receives into a file or pipe. On the source machine a separate netcat takes input from a file or pipe and sends it over the network to the listener. This is great between machines on a LAN where you don't care about authentication, encryption, or compression and I would recommend it for being simpler than anything else in this situation. Over the internet you should use something with better security.

Generate a list of items from a couple of items lists A and B, getting (B - A ) set

ItemsListtoAvoid (A) could be a list of files with a special characteristic to exclude. It can be a result of previous processing list, ex. a list of files containing a special string. AlItemsList.txt (B) Is a complete list of items including some or all items in A. $Difference is saved in ItemsDifference.txt

Show a prettified list of nearby wireless APs

Extract title from HTML files

This command can be used to extract the title defined in HTML pages

Display a block of text: multi-line grep with perl

-n reads input, line by line, in a loop sending to $_ Equivalent to while () { mycode } -e execute the following quoted string (i.e. do the following on the same line as the perl command) the elipses .. operator behaves like a range, remembering the state from line to line.

Slugify: converts strings in any language into Slugs (friendly names to use in URLs and filenames)

Slug the part of an URL which identifies a page using human-readable keywords. Slugs are used to construct friendly URLs (often for permalinks) that are easy to type, descriptive, and easy to remember.

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Commands tagged IP (80)

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