Commands tagged Network sorted by votes

Commands tagged Network (129)

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Get your external IP address

Gets your IP address and has a shorter URL. Show Sample Output
This is sample output - yours may be different.
```
74.171.65.62
```
0

curl l2.io/ip

abrambleninja · 2013-06-07 16:23:01 7
Wait for Web service to spin up, aka alert me when the server stops returning a 503

Show Sample Output
This is sample output - yours may be different.
```
OK: server is up.
OK: server is up.
OK: server is up.
```
0

while true; do curl -vsL -o /dev/null example.com 2>&1 | grep 503 > /dev/null || echo "OK: server is up."; sleep 8; done

noah · 2013-06-26 15:24:51 6
Wait for Web service to spin up, aka alert me when the server stops returning a 503
This is sample output - yours may be different.
0

while curl -dsL example.com 2>&1 | grep 503;do sleep 8;done;echo server up

emile · 2013-07-10 19:03:25 6
Check if TCP port 25 is open

Check trough unix sockets if tcp port is open or close Show Sample Output
This is sample output - yours may be different.
```
TCP port 25 close
```
0

(echo >/dev/tcp/localhost/25) &>/dev/null && echo "TCP port 25 open" || echo "TCP port 25 close"

YouM · 2013-11-12 02:11:01 8
Check if TCP port 25 is open

netstat will list all open ports on the system, unix sockets, tcp sockets and udp sockets. the t flag limits to tcp ports the l flag limits to listening ports and the n flag disables the translation of port to service ( ie :25 displayed instead of :smtp ). then grep for the port you are interested in preceeded by a colon. Show Sample Output
This is sample output - yours may be different.
```
tcp     0     0 127.0.0.1:25     0.0.0.0:*      LISTEN
```
0

netstat -tln | grep :25

Peteches · 2013-11-12 16:47:06 6
Check if TCP port 25 is open
This is sample output - yours may be different.
0

sudo lsof -iTCP:25 -sTCP:LISTEN

pdxdoughnut · 2013-11-12 17:32:34 6
Check if TCP port 25 is open

Using netcat (nc) 25 can be replaced with the friendly value (smtp). Check error code for result or use -v option to echo output nc -z localhost smtp && echo open || echo closed nc -zv host protocol Show Sample Output
This is sample output - yours may be different.
```
Connection to localhost 25 port [tcp/smtp] succeeded!
```
0

nc -zv localhost 25

toaster · 2013-11-21 22:04:00 10
Generate random valid mac addresses

The sed script ensures that the "random" MAC address is unicast (bit 0 of first byte == 0) and local (bit 1 of first byte == 1)
This is sample output - yours may be different.
0

openssl rand -hex 6 | sed 's/$..$/:\1/g; s/^.$.$[0-3]/\12/; s/^.$.$[4-7]/\16/; s/^.$.$[89ab]/\1a/; s/^.$.$[cdef]/\1e/'

phil_m · 2014-04-23 21:43:38 6
Full remote server backup over cstream using tar (excluding unnecessary files) (reports every 10 seconds)

The files are automatically uncompressed when they reach the destination machine. This is a fast way to backup your server to your local computer while it's running (shutting down services is recommended). A file named "exclude.txt" is needed at /tmp/ containing the following : /dev/* /media/* /mnt/* /proc/* /sys/* /tmp/* /home/*/.local/share/Trash /home/*/.gvfs /home/*/.cache /home/*/.thumbnails /etc/fstab /lib/modules/*/volatile/.mounted /var/run/* /var/lock/* /var/tmp/* /var/cache/apt/archives/* /lost+found/* Show Sample Output
This is sample output - yours may be different.
```
895643648 B 854.2 MB 2125.2 s (35:25 min) 421438 B/s 411.56 KB/s
898371584 B 856.8 MB 2132.5 s (35:32 min) 421280 B/s 411.41 KB/s
901783552 B 860.0 MB 2139.8 s (35:39 min) 421431 B/s 411.55 KB/s
904785920 B 862.9 MB 2147.0 s (35:46 min) 421420 B/s 411.54 KB/s
908300288 B 866.2 MB 2154.0 s (35:54 min) 421678 B/s 411.79 KB/s
911953920 B 869.7 MB 2161.2 s (36:01 min) 421969 B/s 412.08 KB/s
914890752 B 872.5 MB 2168.4 s (36:08 min) 421929 B/s 412.04 KB/s
919408640 B 876.8 MB 2175.4 s (36:15 min) 422647 B/s 412.74 KB/s
923365376 B 880.6 MB 2182.6 s (36:22 min) 423061 B/s 413.15 KB/s
```
0

tar -cj / -X /tmp/exclude.txt | cstream -v 1 -c 3 -T 10 | ssh user@host 'tar -xj -C /backupDestination'

fantleas · 2014-07-21 18:52:19 9
Get the IP address of a machine. Just the IP, no junk.

Gives the DNS listed IP for the host you're on... or replace `hostname` with any other host Show Sample Output
This is sample output - yours may be different.
```
Just the IP of the hostname according to DNS
```
0

host `hostname` | rev | cut -d' ' f1 | rev

shaggyhiggins · 2014-10-01 18:55:05 8
List ethernet ports speed

It will list your machine's ethernet ports speed Show Sample Output
This is sample output - yours may be different.
```
eth0:   Speed: 1000Mb/s
eth1:   Speed: 1000Mb/s
eth2:   Speed: 10000Mb/s
eth3:   Speed: 10000Mb/s
```
0

for d in $(cd /sys/class/net && echo eth?) ; do echo "$d: $(ethtool $d |grep -w Speed)"; done

bassiek · 2014-12-28 15:47:46 8
Get your external IP address

Fast and simple. Details: http://api.ident.me Show Sample Output
This is sample output - yours may be different.
```
123.123.123.123
```
0

curl http://ident.me

gmy · 2015-01-13 14:34:47 9
Get your external IP address
This is sample output - yours may be different.
0

curl whatismyip.akamai.com && echo

donmez · 2015-02-07 17:32:02 8
turn on/off wifi

start wifi connection sudo service network-manager start stop wifi connection sudo service network-manager stop
This is sample output - yours may be different.
0

sudo service network-manager start

asdzxc · 2015-02-08 12:06:16 8
Password server

This server can be access by a browser or other remote terminal with ncat. I have to use de test && break to allow ctrl-c to close. Show Sample Output
This is sample output - yours may be different.
```
#abGqHf=MM
o_DoB5da`#
```
0

while [ 1 ]; do cat /dev/urandom | tr -dc ' -~' | head -c 10 | ncat -l 8080 &> /dev/null; test $? -gt 128 && break; done

xxjcaxx · 2016-05-04 14:36:47 10
Get your external IP address
This is sample output - yours may be different.
0

$ curl -L ipconfig.me

Repie · 2018-02-08 09:18:10 24
Get your public IP address using Amazon
This is sample output - yours may be different.
0

curl checkip.amazonaws.com

luissquall · 2019-08-29 23:12:41 170
List nearbies
This is sample output - yours may be different.
-1

/usr/sbin/arp -i eth0 | awk '{print $3}' | sed 1d

prayer · 2009-03-24 18:53:26 8
Get your external IP address

Same thing as above, just uses fetch and ipchicken.com Show Sample Output
This is sample output - yours may be different.
```
1.2.3.4
```
-1

fetch -q -o - http://ipchicken.com | egrep -o '([[:digit:]]{1,3}\.){3}[[:digit:]]{1,3}'

spackle · 2009-08-06 11:57:44 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
Show Network IP and Subnet

same thing as the other
This is sample output - yours may be different.
-1

ipcalc $(ifconfig eth0 | grep "inet addr:" | cut -d':' -f2,4 | sed 's/.+Bcast:/\//g') | awk '/Network/ { print $2 } '

solarislackware · 2009-12-05 15:00:32 3
Get your external IP address

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

curl ifconfig.me/all/xml

truemilk · 2010-04-21 20:45:17 3
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 your external IP address

Additionally it may give your geolocation if it's known by hostip.info Show Sample Output
This is sample output - yours may be different.
```
ipv4: 188.165.241.33
hostname: ns390090.ovh.net
city: Roubaix
country: FRANCE (FR)
latitude: 50.7
longitude: 3.1667
```
-1

curl http://my-ip.cc/host.txt

samleb · 2011-09-01 00:28:49 3
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Rename files in batch

Download YouTube Videos using wget and youtube-dl and just using the video link

in place of "output-filename.mp4" put the name you want the file to be named with. in place of "youtube-video-link" put the link of the Video page eg: http://www.youtube.com/watch?v=AclA-7YntvE in place of "format-number" put the number of the file format you would like How to get the "format-number" to get format number type in below command before running this command $ youtube-dl -F "youtube-video-link" and it will list all the available formats with the format number, like to download in 360p mp4 use the number "18" To automatically let it fetch the best quality available just remove the -f "format-number" and you are good to go.

prevents replace an existing file by mistake

Use set +o noclobber and you will be able to replace files again

Replace duplicate files by hardlinks

This variation can handle file paths containing spaces.

find the path of the java called from the command line

The output will likely point to '/etc/alternatives/java'. So find out where that points by issuing ls -l like this: ls -l /etc/alternatives/java

see the TIME_WAIT and ESTABLISHED nums of the network

find the rpm package name that provides a specific file

For Linux distributions using rpm (eg Mandriva), this command will find the rpm package name that provides a file.

Resets your MAC to a random MAC address to make you harder to find.

Next time you are leaching off of someone else's wifi use this command before you start your bittorrent ...for legitimate files only of course. It creates a hexidecimal string using md5sum from the first few lines of /dev/urandom and splices it into the proper MAC address format. Then it changes your MAC and resets your wireless (wlan0:0).

True Random Dice Roll

Using Git, stage all manually deleted files.

You'll probably want to pass in the -rf options if you have to delete a directory or something.

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Commands tagged Network (129)

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