Commands using link (10)

  • Get all mac address

    I prefer the ip command to ifconfig as ifconfig is supposedly going to be deprecated. Certain IP address aliases can only be seen with the ip command (such as the ones applied by RHCS).


    6
    ip link show
    d34dh0r53 · 2010-03-01 20:10:27 0
  • List your MACs address

    The output of ifconfig is localized, using it will fail in non-English environment. "ip" command in iproute2 provides a consistent output and thus is more robust Show Sample Output


    3
    ip link | awk '/link/ {print $2}'
    fossilet · 2011-03-25 06:26:08 0
  • Get ethX mac addresses

    I much prefer using /sbin/ip over /sbin/ifconfig for most everything. I find the interface and output to be much more consistent and it has many abilities that ifconfig, route, etc. do not. To get the mac address for only one interface, add 'show dev [interface]' to the 'ip link' part of the command: ip link show dev eth0 | grep 'link/ether' | awk '{print $2}' . Also, both this command and the ifconfig one do not require root access to run, so the sudo is not necessary. Show Sample Output


    1
    ip link | grep 'link/ether' | awk '{print $2}'
    markdrago · 2009-11-04 19:41:26 1
  • Get ethX mac addresses

    ...or for a particular interface...


    0
    ip link show eth0 | grep "link/ether" | awk '{print $2}'
    maxmanders · 2009-11-05 17:06:15 0
  • Generate an over-the-top UUID

    first off, if you just want a random UUID, here's the actual command to use: uuidgen Your chances of finding a duplicate after running this nonstop for a year are about the same as being hit by a meteorite before finishing this sentence The reason for the command I have is that it's more provably unique than the one that uuidgen creates. uuidgen creates a random one by default, or an unencrypted one based on time and network address if you give it the -t option. Mine uses the mac address of the ethernet interface, the process id of the caller, and the system time down to nanosecond resolution, which is provably unique over all computers past, present, and future, subject to collisions in the cryptographic hash used, and the uniqueness of your mac address. Warning: feel free to experiment, but be warned that the stdin of the hash is binary data at that point, which may mess up your terminal if you don't pipe it into something. If it does mess up though, just type reset Show Sample Output


    0
    printf $(( echo "obase=16;$(echo $$$(date +%s%N))"|bc; ip link show|sed -n '/eth/ {N; p}'|grep -o -E '([[:xdigit:]]{1,2}:){5}[[:xdigit:]]{1,2}'|head -c 17 )|tr -d [:space:][:punct:] |sed 's/[[:xdigit:]]\{2\}/\\x&/g')|sha1sum|head -c 32; echo
    camocrazed · 2010-07-14 14:04:53 0
  • Ignore all Comment in Vim


    0
    hi! link Comment Ignore
    kev · 2012-02-27 07:15:58 1
  • Dropbox login using only curl, sed and bash

    Use the command line to log into Dropbox. You have to replace me@yahoo.com with your Dropbox email (note the URL-encoding of "@" as %40). Also replace my_passwd with your Dropbox password. (Note: special characters in your password (such as #) must be url-encoded. You will get a cookie (stored in file "cookie") that you can use for subsequent curl operations to dropbox, for example curl -b cookie https://www.dropbox.com/home. Debug note: If you want to see what data curl posts, use curl's --trace-ascii flag. Show Sample Output


    0
    link=https://www.dropbox.com/login ; curl -b a -c cookie -d "t=$(curl -c a $link | sed -rn 's/.*TOKEN: "([^"]*).*/\1/p')&login_email=me%40yahoo.com&login_password=my_passwd" $link
    nixnax · 2013-07-12 07:43:21 0
  • Bring down and delete a network bridge (eg: docker0)


    0
    ip link set docker0 down && brctl delbr docker0
    abn · 2015-12-11 09:05:29 0
  • Download a complete podcast

    This download a complete audio podcast


    -3
    wget -c -v -S -T 100 --tries=0 `curl -s http://ms1.espectador.com/ podcast/espectador/la_venganza_sera_terrible.xml | grep -v xml | grep link | sed 's/]*>//g'`
    fmdlc · 2009-03-04 13:12:28 0
  • 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


    -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 0

What's this?

commandlinefu.com is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

Share Your Commands

Check These Out

Destroy all ZFS snapshots

creeate file named after actual date
Create a file with actual date as filename

Find usb device in realtime
Using this command you can track a moment when usb device was attached.

Get your external IP address ( 10 characters long )
Shortest url to a external IP-service, 10 characters.

Simple Video Surveillance by email
This takes a picture (with the web cam) every 5 minutes, and send the picture to your e-mail. Some systems support mail -a "References: " so that all video surveillance emails are grouped in a single email thread. To keep your inbox clean, it is still possible to filter and move to trash video surveillance emails (and restore these emails only if you really get robbed!) For instance with Gmail, emails sent to me+trash@gmail.com can be filtered with "Matches: DeliveredTo:me+trash@gmail.com"

Non Numeric Check
use to execute a block of code only if $var is numeric

list files recursively by size

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"

Download 10 random wallpapers from images.google.com

Find the package that installed a command

Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for: