Commands using ifconfig sorted by votes

Commands using ifconfig (103)

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Get all IPs via ifconfig
This is sample output - yours may be different.
-2

ifconfig | grep "inet addr" | cut -d: -f2 | cut -d' ' -f1

trungtm · 2009-07-24 09:39:19 5
Get ethX mac addresses

Show Sample Output
This is sample output - yours may be different.
```
00:1e:68:1a:88:69
```
-2

sudo ifconfig -a | grep eth | grep HW | cut -d' ' -f11

rubenmoran · 2009-11-04 19:24:35 3
Show local IP
This is sample output - yours may be different.
-2

ifconfig eth0 | grep "inet:" | cut -d ":" -f2 | cut -d " " -f1

guelfoweb · 2009-12-05 02:59:18 8
Get name of first configured interface

Get the line containing "inet addr:" and the line before that, get down to only the first line, and then get the first word on that line, which should be the interface. Show Sample Output
This is sample output - yours may be different.
```
eth0
```
-2

ifconfig | grep -B 1 "inet addr:" | head -1 | cut -d" " -f1

jasonwalsh · 2010-01-04 23:02:57 5
simple echo of IPv4 IP addresses assigned to a machine

Easy way to grab the IP address of a machine for easy script use. If needed a "| grep -v 127.0.0.1" at the end will suppress localhost. Show Sample Output
This is sample output - yours may be different.
```
192.168.15.250
127.0.0.1
```
-2

ifconfig | awk '/inet addr/ {print $2 }' | sed 's/.*://g'

Guyverix · 2010-03-04 08:15:08 5
mac address for eth0
This is sample output - yours may be different.
-2

ifconfig eth0 | grep 'HWaddr' | awk '{print $5}'

minigeek · 2010-06-26 05:24:31 4
Get your IP addresses

This is what we use. You can grep -v 127.0.0.1 if you wish.
This is sample output - yours may be different.
-2

ifconfig | grep -o "inet [^ ]*" | cut -d: -f2

dooblem · 2010-12-06 10:36:52 5
Reading my nic's mac address

This command is useful when you want to check your nic's mac address, if you're interested in your wireless interface, use its ID instead "eth". This command was tested under Ubuntu and Slackware GNU/Linux. Show Sample Output
This is sample output - yours may be different.
```
00:11:22:33:44:55
```
-2

ifconfig | grep eth | awk '{print $5}'

diacus · 2011-02-02 20:42:22 4
Get your local/private IP

If you don't send an interface, it shows private IP address of all interfaces
This is sample output - yours may be different.
-2

localIP() { ifconfig ${1:--a} | sed '/Link encap\|inet\|6 addr/!d;s/Link encap.*$//;s/.*inet addr:$[0-9\.]*$.*/\1/g;s/.*inet6 addr: $.*$ .*/\1/g' ; }

vando · 2011-03-20 04:59:54 47
Get the IP address
This is sample output - yours may be different.
-2

ifconfig | awk -F"[: ]+" '/inet addr/ {print $4}'

saibbot · 2012-07-16 07:48:33 3
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
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
Return IP Address

grabs your local IP Address. Show Sample Output
This is sample output - yours may be different.
```
192.168.1.100
```
-3

ifconfig -a|grep Bcast:|cut -d\: -f2|awk '{print $1}'

metalx1000 · 2009-12-04 21:00:46 5
Return IP Address
This is sample output - yours may be different.
-3

awk '/inet end/ {print $3}' <(ifconfig eth0)

voyeg3r · 2009-12-05 10:45:31 4
show your private/local ip address

This doesn't make any assumptions about your IP address and prints out one IP address per line if you have multiple network interfaces. Show Sample Output
This is sample output - yours may be different.
```
77.98.155.94
10.0.0.1
```
-3

ifconfig | sed '/.*addr.*Bcast.*/ ! d'| sed 's/.*addr:$[0-9\.]*$.*/\1/'

Haegin · 2010-03-26 08:13:13 3
show your private/local ip address
This is sample output - yours may be different.
-3

ifconfig | awk '/inet addr/ &&! /127.0.0.1/{ gsub(/addr:/,""); print $2 }'

OJM · 2010-03-26 10:07:14 3
Unique number by Mac Address

gets the last number of the mac address to use it for other stuff Show Sample Output
This is sample output - yours may be different.
```
$ echo $UNIQUE_BY_MAC
213
```
-3

UNIQUE_BY_MAC=$(ifconfig |grep eth0|awk '{ print strtonum("0x"substr($6,16,2)) }')

rubo77 · 2010-06-01 17:34:43 10
Get the mac address of eth0 in uppercase minus the colons

This will get the mac address of the eth0 and change lowercase to uppercase. The sed command removed the colons.
This is sample output - yours may be different.
-3

ifconfig eth0 | grep 'HWaddr' | awk '{print $5}' | tr 'a-z' 'A-Z' | sed -e 's/://g'

minigeek · 2010-06-26 05:35:03 3
Get your local IP regardless of your network interface

short enough to be tweetable Show Sample Output
This is sample output - yours may be different.
```
192.168.1.102
```
-3

ifconfig | grep "inet\ " | grep -v "127.0" | sed -e 's/inet\ addr://g' | sed -e 's/Bcast:/\ \ \ \ \ \ \ /g' | cut -c 1-29 | sed -e 's/\ //g'

LinuxMan · 2010-12-01 19:06:11 4
Get the IP address
This is sample output - yours may be different.
-3

ifconfig | grep "inet addr" | cut -d":" -f2 | cut -d" " -f1

liushuililuo · 2012-07-13 00:38:38 8
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
Periodically loop a command

You can use this to loop any command to periodically see the output. while true; do [YOUR COMMAND HERE]; sleep [# of seconds]; done; Alternatively, you can put it in a simple shell script to save typing! #/!bin/bash while true; do $1; sleep $2; done; /path/to/script.sh "ifconfig eth0 | grep 'inet addr:'" 60 Show Sample Output
This is sample output - yours may be different.
```
inet addr:192.168.1.2  Bcast:192.168.1.255  Mask:255.255.255.0
[60 seconds later]
          inet addr:192.168.1.2  Bcast:192.168.1.255  Mask:255.255.255.0
[60 seconds later]
          inet addr:192.168.1.2  Bcast:192.168.1.255  Mask:255.255.255.0
[... Ctrl+C to stop]
```
-5

while true; do ifconfig eth0 | grep "inet addr:"; sleep 60; done;

bandit36 · 2009-04-01 19:29:28 19

HP UX doesn't have a -a switch in the ifconfig command. This line emulates the same result shown in Solaris, AIX or Linux Show Sample Output

-5

for i in `netstat -rn |grep lan |cut -c55-60 |sort |uniq`; do ifconfig $i; done

Kaio · 2010-01-28 17:35:20 5

show your private/local ip address

This assumes your local ip starts with 192.something (e.g. 192.168), it greps ifconfig output for an ip that starts with 192, then strips the extra garbage (besides the ip) Maybe `ifconfig | grep addr | grep Bcast` would also do it Show Sample Output
This is sample output - yours may be different.
```
192.168.1.104
```
-5

ifconfig | grep addr:192 | sed s/Bcast.*// | sed 's/^.*inet addr://'

hasenj · 2010-03-26 07:37:21 4
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List subfolders from largest to smallest with sizes in human readable form

Selecting a random file/folder of a folder

Also looks in subfolders

Watch how fast the files in a drive are being deleted

This can be useful when a large remove operation is taking place.

Simple example of the trap command

Get decimal ascii code from character

the shortest command for character 'a' i know

Add Password Protection to a file your editing in vim.

While I love gpg and truecrypt there's some times when you just want to edit a file and not worry about keys or having to deal needing extra software on hand. Thus, you can use vim's encrypted file format. For more info on vim's encrypted files visit: http://www.vim.org/htmldoc/editing.html#encryption

Mapreduce style processing

parallel can be installed on your central node and can be used to run a command multiple times. In this example, multiple ssh connections are used to run commands. (-j is the number of jobs to run at the same time). The result can then be piped to commands to perform the "reduce" stage. (sort then uniq in this example). This example assumes "keyless ssh login" has been set up between the central node and all machines in the cluster. bashreduce may also do what you want.

rgrep: recursive grep without .svn

Only excludes .svn from filenames.

Get AWS temporary credentials ready to export based on a MFA virtual appliance

You might want to secure your AWS operations requiring to use a MFA token. But then to use API or tools, you need to pass credentials generated with a MFA token. This commands asks you for the MFA code and retrieves these credentials using AWS Cli. To print the exports, you can use: `awk '{ print "export AWS_ACCESS_KEY_ID=\"" $1 "\"\n" "export AWS_SECRET_ACCESS_KEY=\"" $2 "\"\n" "export AWS_SESSION_TOKEN=\"" $3 "\"" }'` You must adapt the command line to include: * $MFA_IDis ARN of the virtual MFA or serial number of the physical one * TTL for the credentials

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"

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Commands using ifconfig (103)

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