Commands tagged net sorted by votes

Commands tagged net (9)

sorted by

Get info about remote host ports and OS detection

Where < target > may be a single IP, a hostname or a subnet -sS TCP SYN scanning (also known as half-open, or stealth scanning) -P0 option allows you to switch off ICMP pings. -sV option enables version detection -O flag attempt to identify the remote operating system Other option: -A option enables both OS fingerprinting and version detection -v use -v twice for more verbosity. nmap -sS -P0 -A -v < target >
This is sample output - yours may be different.
18

nmap -sS -P0 -sV -O <target>

starchox · 2009-02-18 07:32:03 35
To Stop or Start (Restart) a Windows service from a Linux machine
This is sample output - yours may be different.
7

net rpc -I indirizzoip -U nomeutente%password servizio {stop|start} nomedelservizio

0disse0 · 2011-06-16 18:08:51 5
Start a SOCKS proxy to avoid a restrictive firewall

You may go to Internet by means of your home ssh server. You must configure your local proxy to send traffic through the proxy. Many programs allows that: firefox, pidgin, skype, gnome, etc. Your home ssh server must listen in any of the ports permitted by your enterprise firewall. That usually includes 80 and 443. Show Sample Output
This is sample output - yours may be different.
```
<no output>
```
3

autossh -N -D localhost:1080 myhome.example.net -p 443

prayer · 2010-05-22 19:52:30 7
Update twitter with Perl

Requires Net::Twitter. Just replace the double quoted strings with the appropriate info.
This is sample output - yours may be different.
2

perl -MNet::Twitter -e '$nt = Net::Twitter->new(traits => [qw/API::REST/], username => "YOUR USERNAME", password => "YOUR PASSWORD"); $ud = $nt->update("YOUR TWEET");'

dbbolton · 2010-06-16 19:46:05 5
parse and format IP:port currently in listen state without net tools

Useful for containers and environments where you need to know if a port is currently in listen mode but you have not easy way or privileges to install net-tools like netstat or ss. "0A" is the code for listen state. The IP hex is reverse order and all in hex format. Show Sample Output
This is sample output - yours may be different.
```
0.0.0.0:111
10.174.109.1:53
127.0.0.53:53
0.0.0.0:22
127.0.0.1:631
0.0.0.0:8000
```
2

cat /proc/net/tcp | grep " 0A " | sed 's/^[^:]*: $..$$..$$..$$..$:$....$.*/echo $((0x\4)).$((0x\3)).$((0x\2)).$((0x\1)):$((0x\5))/g' | bash

glaudiston · 2020-05-23 12:36:21 164
tell if a port is in use

if you don't do --numeric-ports, netstat will try to resolve them to names Show Sample Output
This is sample output - yours may be different.
```
tcp        0      0 localhost.localdomain:8321  *:*                         LISTEN
tcp        0      0 ::1:8321                    *:*                         LISTEN
```
1

netstat -a --numeric-ports | grep 8321

peter4512 · 2012-01-20 22:00:56 7
Check if a port is open to the internet using canyouseeme.org

For now just returns either "Success" or "Error". My awk-fu isn't strong enough to hackily parse out the error in case there is one, so I kept it simple. Show Sample Output
This is sample output - yours may be different.
```
~ user@host
&#10095; cysm 80
Success

~ user@host
&#10095; cysm 443
Error
```
0

cysm() { curl -sd port="$1" http://canyouseeme.org |grep -o 'Success\|Error' }

awh · 2014-11-11 23:30:39 52
Monitor Wireless Adapter Stats

Monitors basic wireless interface statistics, such as signal strength and discarded packets. The watch command's -n parameter sets a refresh rate of every 1 second. Show Sample Output
This is sample output - yours may be different.
```
Inter-| sta-|   Quality        |   Discarded packets               | Missed | WE
 face | tus | link level noise |  nwid  crypt   frag  retry   misc | beacon | 22
 wlan0: 0000   58.  -52.  -256        0      0      0    449    540        0
```
0

watch -n 1 cat /proc/net/wireless

1nF1D3L · 2016-09-04 02:44:51 20
Update twitter with curl
This is sample output - yours may be different.
-1

curl -u username:password -d status="blah blah blah" https://twitter.com/statuses/update.xml

sha · 2010-06-17 03:10:42 15

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

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"

Rename all files which contain the sub-string 'foo', replacing it with 'bar'

Would this command line achieve the desired function? My CLI knowledge is not great so this could certainly be wrong. It is merely a suggestion for more experienced uses to critique. Best wishes roly :-)

Run a command as root, with a delay

$ sleep 1h ; sudo command or $ sudo sleep 1h ; sudo command won't work, because by the time the delay is up, sudo will want your password again.

Hide or show Desktop Icons on MacOS

Hides all Files and Folders on the MacOS Desktop. To show files and folders, type "true" instead of "false". "Finder" at the end is case sensitive, "finder" doesn’t work

count the number of specific characters in a file or text stream

In this example, the command will recursively find files (-type f) under /some/path, where the path ends in .mp3, case insensitive (-iregex). It will then output a single line of output (-print0), with results terminated by a the null character (octal 000). Suitable for piping to xargs -0. This type of output avoids issues with garbage in paths, like unclosed quotes. The tr command then strips away everything but the null chars, finally piping to wc -c, to get a character count. I have found this very useful, to verify one is getting the right number of before you actually process the results through xargs or similar. Yes, one can issue the find without the -print0 and use wc -l, however if you want to be 1000% sure your find command is giving you the expected number of results, this is a simple way to check. The approach can be made in to a function and then included in .bashrc or similar. e.g. $ count_chars() { tr -d -c "$1" | wc -c; } In this form it provides a versatile character counter of text streams :)

Start COMMAND, and kill it if still running after 5 seconds

Find the package that installed a command

Identify differences between directories (possibly on different servers)

This can be much faster than downloading one or both trees to a common servers and comparing the files there. After, only those files could be copied down for deeper comparison if needed.

scp file from hostb to hostc while logged into hosta

While at the command line of of hosta, scp a file from remote hostb to remote hostc. This saves the step of logging into hostb and then issuing the scp command to hostc.

combining streams

2>&1 permit to combinate stdout and stderr. grep will catch stderr and stdout instead of stdout only.

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:

» all commands
» commands with 3 up-votes (commandlinefu3)
» commands with 10 up-votes (commandlinefu10)
» commands tagged net

Commands tagged net (9) the last day the last week the last month all time sorted by date votes

What's this?

Check These Out

Stay in the loop…

Commands tagged net (9)

sorted by