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Commands tagged Network

Commands tagged Network from sorted by
Terminal - Commands tagged Network - 103 results
curl http://my-ip.cc/host.txt
2011-09-01 00:28:49
User: samleb
Tags: Network curl ip address geoip
-1
Up
Down
Get your external IP address

Additionally it may give your geolocation if it's known by hostip.info

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watch -n 2 -d '/sbin/ifconfig eth0'
2011-08-16 10:29:34
User: totti
Functions: watch
Tags: Network ifconfig watch
5
Up
Down
Highlight network TX, RX information change
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ip addr show eth0 | grep ether | awk '{print $2}'
2011-05-01 19:54:46
User: ryanc
Functions: awk grep
Tags: Network Linux
-2
Up
Down
List your MACs address

Linux specific, requires iproute2 (but most distros have that by default now)

Comments (1) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
while cat /proc/net/dev; do sleep 1; done | awk '/eth0/ {o1=n1; o2=n2; n1=$2; n2=$10; printf "in: %9.2f\t\tout: %9.2f\r", (n1-o1)/1024, (n2-o2)/1024}'
2011-03-26 02:52:14
User: quadcore
Functions: awk cat printf sleep
Tags: Network watch rate interface
1
Up
Down
Watch RX/TX rate of an interface in kb/s

A shorter version

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while :; 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-$4)/1024)}'; sleep 1; done
2011-03-22 10:23:33
User: DerksIT
Functions: awk cut echo grep sleep tr
Tags: Network watch rate interface
0
Up
Down
Watch RX/TX rate of an interface in kb/s
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while [ /bin/true ]; do OLD=$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
2011-03-22 10:02:23
User: hons
Functions: awk cut echo grep sleep tr
Tags: Network watch rate interface
15
Up
Down
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.

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iperf -s
2011-01-24 07:58:38
User: forcefsck
Tags: Network test speed bandwidth throughput iperf
8
Up
Down
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.

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nc -l -p 7777 > /dev/null
2011-01-24 00:06:45
User: kerim
Tags: Network netcat nc pv test speed throughput
1
Up
Down
live netcat network throughput test

On the another machine write this command.

pv -r /dev/zero | nc 192.168.1.1 7777

It will show live throughput between two machine.The destination machine ip is at our example 192.168.1.1

You must multiply by 8 for the network calculation.

You must install pv and netcat commands for this commands usage.

kerim@bayner.com

http://www.bayner.com/

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nmap -v -sP 192.168.10.0/24 | grep -c down
2011-01-04 11:20:27
User: ioggstream
Functions: grep
Tags: Network namp
1
Up
Down
count of down available ips

avoid wc overload ;)

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nmap -v -sP 192.168.10.0/24 | grep down | wc -l
2011-01-03 21:33:02
User: unixmonkey16033
Functions: grep wc
Tags: Network namp
1
Up
Down
count of down available ips
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python -c "from itertools import imap; from random import randint; print ':'.join(['%02x'%x for x in imap(lambda x:randint(0,255), range(6))])"
2010-12-08 11:02:16
User: ohe
Functions: python
Tags: Network bash mac
1
Up
Down
Generate random valid mac addresses

Python Alternative

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ruby -e 'puts (1..6).map{"%0.2X"%rand(256)}.join(":")'
2010-12-08 10:01:31
User: eightmillion
Tags: Network bash mac ruby
3
Up
Down
Generate random valid mac addresses

Ruby version.

Also, a perl version:

perl -e 'printf("%.2x.",rand(255))for(1..5);printf("%.2x\n",rand(255))'
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macchanger -A (nic)
2010-12-07 20:22:54
User: pebkac
Tags: Network bash mac
0
Up
Down
Generate random valid mac addresses

You have to install the package macchanger but this command will create a random mac from a list of known manufacturers. If you want to make a complete random mac, use the -r option .

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for i in {1..6}; do printf "%0.2X:" $[ $RANDOM % 0x100 ]; done | sed 's/:$/\n/'
2010-12-07 19:26:58
User: forcefsck
Functions: printf sed
Tags: Network bash mac
2
Up
Down
Generate random valid mac addresses

Shorter and more straightforward.

Also in perl:

perl -e 'print join(":", map { sprintf "%0.2X",rand(256) }(1..6))."\n"'
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h=0123456789ABCDEF;for c in {1..12};do echo -n ${h:$(($RANDOM%16)):1};if [[ $((c%2)) = 0 && $c != 12 ]];then echo -n :;fi;done;echo
2010-12-05 01:35:03
User: dabom
Functions: echo
Tags: Network bash mac
2
Up
Down
Generate random valid mac addresses

Doubt it actually generates valid mac addresses but this version doesn't need any external commands so it runs much faster.

Much shorter as well.

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for i in {0..1200}; do for i in {1..12} ; do echo -n ${hexchars:$(( $RANDOM % 16 )):1} ; done | sed -e 's/\(..\)/:\1/g' | sed 's/.\(.*\)/\1/' ; echo; done
2010-12-04 16:44:11
User: Raymii
Functions: echo sed
Tags: Network bash sed mac
2
Up
Down
Generate random valid mac addresses

First set the variable $hexchars:

hexchars="0123456789ABCDEF"

Change the number in the first for loop if you need less then 1200 mac addresses

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socat TCP-LISTEN:locport,fork TCP:XXX.XXX.XXX.XXX:YYY,sourceport=srcport
2010-11-22 13:24:33
User: cyrusza
Tags: Network tricks tunneling
0
Up
Down
Create a tunnel from a remote server to the local machine using a specific source port

It connects to XXX.XXX.XXX.XXX port YYY, using a source port of "srcport" and binds the tunnel on local port "locport". Then you can connect to localhost:locport.

With this command it's possible to connect to servers using a specific source port (useful when a firewall check the source port). Because of the connections starting from the same source port, this works well only for the first connection (for example, works well with SSH and bad with HTTP because of multiple requests).

* It requires socat

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curl ifconfig.me
2010-10-09 08:12:26
User: dpoblador
Tags: Network curl
11
Up
Down
Get My Public IP Address
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while :; do ping -W1 -c1 -n 8.8.8.8 > /dev/null || tput bel > /dev/console; sleep 1; done
2010-09-24 06:34:12
User: hackerb9
Functions: ping sleep tput
Tags: Network ping beep console server daemon rc.local
0
Up
Down
Make a server's console beep when the network is down

This is like ping -a, but it does the opposite. It alerts you if the network is down, not up. Note that the beep will be from the speaker on the server, not from your terminal.

Once a second, this script checks if the Internet is accessible and beeps if it is not. I define the Net as being "UP", if I can ping Google's public DNS server (8.8.8.8), but of course you could pick a different static IP address. I redirect the beep to /dev/console so that I can run this in the background from /etc/rc.local. Of course, doing that requires that the script is run by a UID or GID that has write permissions to /dev/console (usually only root).

Question: I am not sure if the -W1 flag works under BSD. I have only tested this under GNU/Linux using ping from iputils. If anybody knows how portable -W is, please post a comment.

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route -n | grep "^0\." | awk '{print "Gateway to the World: "$2", via "$NF""}'
2010-08-09 11:55:37
User: bandie91
Functions: awk grep route
Tags: Network IP router gateway
-1
Up
Down
Find default gateway
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ip route show | awk '$3 ~ /^[1-9]+/ {print $3;}'
2010-08-08 23:57:23
User: kerim
Functions: awk route
Tags: Network IP router gateway
-1
Up
Down
Find default gateway

Find your default gateway and print it directly output.

http://www.bayner.com/

kerim@bayner.com

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route -n | awk '$2 ~/[1-9]+/ {print $2;}'
2010-08-08 23:51:07
User: kerim
Functions: awk route
Tags: Network IP router gateway
-2
Up
Down
Find default gateway

Find your default gateway and print it directly output

http://www.bilgisayarmatematik.com/

kerim@bayner.com

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wget -qO- icanhazip.com
2010-06-24 03:49:14
User: SuperJediWombat
Functions: wget
Tags: Network curl ip address
10
Up
Down
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
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echo -e "GET /ip HTTP/1.0\nUser-Agent: netcat\nHOST: ifconfig.me\n\n" | nc ifconfig.me 80 | sed -n '/^[0-9]/p'
2010-06-16 19:08:05
User: putnamhill
Functions: echo sed
Tags: Network netcat ip address
-2
Up
Down
Get your external IP address

Here's a version that uses netcat (although I'd much rather use curl!).

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lynx --dump icanhazip.com
2010-06-16 11:52:50
User: 111110100
Tags: Network curl ip address
-3
Up
Down
Get your external IP address

If curl isn't available, use lynx.

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