Commands tagged Network sorted by votes

Commands tagged Network (129)

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Highlight network TX, RX information change
This is sample output - yours may be different.
5

watch -n 2 -d '/sbin/ifconfig eth0'

totti · 2011-08-16 10:29:34 4

network usage per process

Nethogs groups bandwidth by process. Show Sample Output

sudo nethogs eth0

totti · 2013-01-25 08:20:44 6

Viewable terminal session over network.

connect to it with any network command (including web browser - if you don't mind weird formatting) curl 127.0.0.1:9876 nc 127.0.0.1 9876 Show Sample Output
This is sample output - yours may be different.
```
[1] 9879
Script started, file is /tmp/view
```
5

mkfifo /tmp/view; nc -l 9876 < /tmp/view& script -f /tmp/view

snipertyler · 2014-06-23 05:06:13 8
Show established network connections
This is sample output - yours may be different.
4

lsof -i | grep -i estab

P17 · 2009-05-06 17:45:55 15
What is My WAN IP?

The curl command retrieve the HTML text containing the IP address. The grep command picks out the IP address from that HTML text. Show Sample Output
This is sample output - yours may be different.
```
$ curl -s checkip.dyndns.org | grep -Eo '[0-9.]+'
64.221.138.109
```
4

curl -s checkip.dyndns.org | grep -Eo '[0-9\.]+'

haivu · 2009-05-21 16:12:21 8
Make a high definition VNC

-nohttpd don't run mini-httpd if VNC java applet is found -name change the name of the desktop, it's passed to xstartup script via $VNCDESKTOP, run different set of apps acording the name. -depth pixel depth in bits of the desktop, default is 16 -geometry size of the desktop, default is 1024x768
This is sample output - yours may be different.
3

vncserver -nohttpd -name hidef-server -depth 24 -geometry 1440x900

starchox · 2009-02-17 17:50:33 9
Get the IP address of a machine. Just the IP, no junk.
This is sample output - yours may be different.
3

/sbin/ifconfig -a | awk '/(cast)/ { print $2 }' | cut -d':' -f2 | head -1

d4n3sh · 2009-04-15 06:44:18 12
Delete all aliases for a network interface on a (Free)BSD system

The example command deletes all aliases for network interface 'em0' assuming that the aliases have netmask of 255.255.255.255 and the master IP has some other netmask (such as 255.255.255.0). See here -> http://my.galagzee.com/2009/07/22/deleting-all-network-interface-aliases/ for more on the rationale of this command.
This is sample output - yours may be different.
3

ifconfig | grep "0xffffffff" | awk '{ print $2 }' | xargs -n 1 ifconfig em0 delete

vwal · 2009-08-04 05:18:36 3
Get your external IP address with a random commandlinefu.com command

There's been so many ways submitted to get your external IP address that I decided we all need a command that will just go pick a random one from the list and run it. This gets a list of "Get your external IP" commands from commanlinefu.com and selects a random one to run. It will run the command and print out which command it used. This is not a serious entry, but it was a learning exercise for me writing it. My personal favourite is "curl icanhazip.com". I really don't think we need any other ways to do this, but if more come you can make use of them with this command ;o). Here's a more useful command that always gets the top voted "External IP" command, but it's not so much fun: 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}') Show Sample Output
This is sample output - yours may be different.
```
$ IFS=$'\n';cl=($(curl -s http://www.commandlinefu.com/commands/matching/external/ZXh0ZXJuYWw=/sort-by-votes/plaintext|sed -n '/^# Get your external IP address$/{n;p}'));c=${cl[$(( $RANDOM % ${#cl[@]} ))]};eval $c;echo "Command used: $c"
86.134.45.64
Command used: curl ip.appspot.com
```
3

IFS=$'\n';cl=($(curl -s http://www.commandlinefu.com/commands/matching/external/ZXh0ZXJuYWw=/sort-by-votes/plaintext|sed -n '/^# Get your external IP address$/{n;p}'));c=${cl[$(( $RANDOM % ${#cl[@]} ))]};eval $c;echo "Command used: $c"

jgc · 2009-11-04 16:55:44 9
How many Linux and Windows devices are on your network?

Shows how many Windows and Linux devices are on your network. May add support for others, but that's all that are on my network right now. Show Sample Output
This is sample output - yours may be different.
```
3 Linux device(s)
2 Window(s) devices
```
3

sudo nmap -F -O 192.168.1.1-255 | grep "Running: " > /tmp/os; echo "$(cat /tmp/os | grep Linux | wc -l) Linux device(s)"; echo "$(cat /tmp/os | grep Windows | wc -l) Window(s) devices"

matthewbauer · 2010-01-10 03:09:56 5
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))'
This is sample output - yours may be different.
3

ruby -e 'puts (1..6).map{"%0.2X"%rand(256)}.join(":")'

eightmillion · 2010-12-08 10:01:31 7
Scan Subnet for IP and MAC addresses
This is sample output - yours may be different.
3

nmap -sP 192.168.1.0/24

harpo · 2014-11-07 12:15:06 8
Creates a proxy based on tsocks.
This is sample output - yours may be different.
2

alias tproxy='ssh -ND 8118 user@server&; export LD_PRELOAD="/usr/lib/libtsocks.so"'

P17 · 2009-03-24 20:24:17 11
add static arp entry to default gateway, arp poison protection
This is sample output - yours may be different.
2

arp -s $(route -n | awk '/^0.0.0.0/ {print $2}') \ $(arp -n | grep `route -n | awk '/^0.0.0.0/ {print $2}'`| awk '{print $3}')

aramosf · 2009-03-25 09:53:10 8
send echo to socket network

Using netcat, usuallly installed on debian/ubuntu. Also to test against a sample server the following two commands may help echo got milk? | netcat -l -p 25 python -c "import SocketServer; SocketServer.BaseRequestHandler.handle = lambda self: self.request.send('got milk?\n'); SocketServer.TCPServer(('0.0.0.0', 25), SocketServer.BaseRequestHandler).serve_forever()" Show Sample Output
This is sample output - yours may be different.
```
got milk?
```
2

echo foo | netcat 192.168.1.2 25

pykler · 2009-09-13 01:33:02 4
add a ip address to a network device

Allows to add more than one ip address to one network device.
This is sample output - yours may be different.
2

ip addr add 192.168.10.1/24 dev eth0

wincus · 2010-01-12 13:07:36 5
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 Show Sample Output
This is sample output - yours may be different.
```
57:46:94:C4:2E:8C
81:03:BA:C0:69:F2
58:1D:AB:FE:BC:70
C6:1F:49:58:9B:94
17:6B:BF:8D:C5:E8
BA:0E:9A:0F:BA:B6
54:45:62:93:C3:46
2B:A8:0E:04:4E:39
47:3E:B0:63:72:AE
42:E9:EE:AA:EC:E7
76:B3:60:0F:B9:AA
C4:33:DB:6B:55:71
A1:CE:52:15:9B:4E
```
2

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

Raymii · 2010-12-04 16:44:11 4
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. Show Sample Output
This is sample output - yours may be different.
```
7A:F1:83:0F:F0:67
```
2

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

dabom · 2010-12-05 01:35:03 3
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"'
This is sample output - yours may be different.
2

for i in {1..6}; do printf "%0.2X:" $[ $RANDOM % 0x100 ]; done | sed 's/:$/\n/'

forcefsck · 2010-12-07 19:26:58 3
Find default gateway (proper at ppp connections too)
This is sample output - yours may be different.
2

route -n | perl -ne '$ANY="0.0.0.0"; /^$ANY/ and split /\s+/ and print "Gateway to the World: ",($_[1]!=$ANY)?$_[1]:(`ip address show $_[$#_]`=~/peer ([0-9\.]+)/ and $1),", via $_[$#_].\n"'

bandie91 · 2011-09-13 08:05:58 5
Show your local ipv4 IP

To show ipv6 instead, use [[ -6 ]] instead of [[ -4 ]] ip -o -6 a s | awk -F'[ /]+' '$2!~/lo/{print $4}' To show only the IP of a specific interface, in case you get more than one result: ip -o -4 a s eth0 | awk -F'[ /]+' '$2!~/lo/{print $4}' ip -o -4 a s wlan0 | awk -F'[ /]+' '$2!~/lo/{print $4}' Show Sample Output
This is sample output - yours may be different.
```
192.168.0.1
```
2

ip -o -4 a s | awk -F'[ /]+' '$2!~/lo/{print $4}'

paulera · 2015-02-13 11:19:31 11
Resolve the "all display buffers are busy, please try later" error on a Foundry
This is sample output - yours may be different.
1

dm display-buffer reset

curiousstranger · 2009-08-24 16:41:52 4

Another way to see the network interfaces

Like many other thing in Linux ,you can see the same thing in different way. Show Sample Output

ip addr show

unixbhaskar · 2009-08-29 12:52:02 3

Get your external IP address

Request all information about my IP address in json format
This is sample output - yours may be different.
1

curl ifconfig.me/all/json

truemilk · 2010-04-21 20:47:17 5
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.
This is sample output - yours may be different.
1

while :; do ping -W1 -c1 -n 8.8.8.8 > /dev/null || tput bel > /dev/console; sleep 1; done

hackerb9 · 2010-09-24 06:34:12 7
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send a message to a windows machine in a popup

It will only work if the service NETSEND in the Windows machine is enabled.

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 drive names next to their full serial number (and disk info)

Scrap everything and use `gawk` to do all the magic, since it's like the future or something. $ gawk 'match($11, /[a-z]{3}$/) && match($9, /^ata-/) { gsub("../", ""); print $11,"\t",$9 }' Yank out only ata- lines that have a drive letter (ignore lines with partitions). Then strip ../../ and print the output. Yay awk. Be sure to see the alternatives as my initial command is listed there. This one is a revision of the original.

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"

Run a command when a file is changed

Create a mirror of a local folder, on a remote server

Create a exact mirror of the local folder "/root/files", on remote server 'remote_server' using SSH command (listening on port 22) (all files & folders on destination server/folder will be deleted)

Import SQL into MySQL with a progress meter

This uses PV to monitor the progress of the MySQL import and displays it though Zenity. You could also do this pv ~/database.sql | mysql -u root -pPASSWORD -D database_name and get a display in the CLI that looks like this 2.19MB 0:00:06 [ 160kB/s] [> ] 5% ETA 0:01:40 My Nautalus script using this command is here http://www.daniweb.com/forums/post1253285.html#post1253285

Graphical tree of sub-directories with files

The command finds every item within the directory and edits the output so that subdirectories are and files are output much like the tree command

In (any) vi, add a keystroke to format the current paragraph.

That goes into your $HOME/.exrc file. " Nice macro to reformat lines: map ^A !}fmt Note that the ^A has to be input by typing ^V^A.

find previously entered commands (requires configuring .inputrc)

[Click the "show sample output" link to see how to use this keystroke.] Meta-p is one of my all time most used and most loved features of working at the command line. It's also one that surprisingly few people know about. To use it with bash (actually in any readline application), you'll need to add a couple lines to your .inputrc then have bash reread the .inputrc using the bind command: $ echo '"\en": history-search-forward' >> ~/.inputrc $ echo '"\ep": history-search-backward' >> ~/.inputrc $ bind -f ~/.inputrc I first learned about this feature in tcsh. When I switched over to bash about fifteen years ago, I had assumed I'd prefer ^R to search in reverse. Intuitively ^R seemed better since you could search for an argument instead of a command. I think that, like using a microkernel for the Hurd, it sounded so obviously right fifteen years ago, but that was only because the older way had benefits we hadn't known about. I think many of you who use the command line as much as I do know that we can just be thinking about what results we want and our fingers will start typing the commands needed. I assume it's some sort of parallel processing going on with the linguistic part of the brain. Unfortunately, that parallelism doesn't seem to work (at least for me) with searching the history. I realize I can save myself typing using the history shortly after my fingers have already started "speaking". But, when I hit ^R in Bash, everything I've already typed gets ignored and I have to stop and think again about what I was doing. It's a small bump in the road but it can be annoying, especially for long-time command line users. Usually M-p is exactly what I need to save myself time and trouble. If you use the command line a lot, please give Meta-p a try. You may be surprised how it frees your brain to process more smoothly in parallel. (Or maybe it won't. Post here and let me know either way. ☺)

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Commands tagged Network (129)

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