netcat Questions
2
Solved
I'm trying to create a persistent connection using bash. On terminal 1, I keep a netcat running as a server:
$ nc -vlkp 3000
Listening on [0.0.0.0] (family 0, port 3000)
On terminal 2, I create ...
3
Solved
As the basis for a larger script I'm trying to write I'm trying to basically implement a basic netcat client in bash. My current script techincally works, it looks like this:
#!/bin/bash
exec 3&l...
6
Solved
So, I have to retrieve temperature from any one of the cities from http://www.rssweather.com/dir/Asia/India.
Let's assume I want to retrieve of Kanpur's.
How to make an HTTP GET request with Net...
17
I'm trying to set up a minimal web server using netcat (nc). When the browser calls up localhost:1500, for instance, it should show the result of a function (date in the example below, but eventual...
13
Solved
I'm trying to do a custom dockerfile with jenkins on it. I would to wait until port 8080 is open instead of doing an ugly 'sleep 60' with netcat but I'm not very confident with bash scripts and net...
4
Solved
I found this and am using it as my base, but it wasn't working right out of the box. My goal is also to treat it as a package instead of a command line utility, so my code changes will reflect that...
4
How can I save result from nc to the variable?
I want:
nc: connect to localhost port 1 (tcp) failed: Connection refused
on my variable. I tried:
a="$(nc -z -v localhost 1)"
echo $a
but out...
4
Solved
I have two virtual machines open, one is listening on the connection, the other connects with nc <ip> <port> from a python subprocess call. I want to send just 1 line of text over the c...
3
Solved
I have a netcat installed on my local machine and a service running on port 25565. Using the command:
nc 127.0.0.1 25565 < /dev/null; echo $?
Netcat checks if the port is open and returns a 0...
2
Solved
Problem
I have been trying to use Ncat to view some TCP traffic on a CentOS virtual box. However, on this particular machine I can't even establish a simple server/client communication.
I open a ...
6
I want to send only one short value in a UDP packet, but running the command
echo -n "hello" | nc -4u localhost 8000
I can see that the server is getting the hello stuff but I have to press Ctrl...
1
Solved
When I try to install Redmail I get the error:
Package netcat is a virtual package provided by:
netcat-traditional 1.10-47
netcat-openbsd 1.218-5ubuntu1
E: Package 'netcat' has no installation c...
2
I've got some binary commands (which I'm representing as hex) that I need to send to a remote device (it's an embedded data collection device) and observe the reply.
It's easy to connect to it wi...
Filiano asked 11/5, 2017 at 15:33
4
Solved
I have an embedded linux application with a simple interactive command line interface.
I'd like to access the command line from telnet (or network, in general).
However, the process should be sta...
3
Solved
I try to get zookeeper stat from shell by using nc,
call nc localhost 2181 first, then type in: stat works.
while echo "stat" | nc localhost 2181 returns nothing.
why?
Witcher asked 18/2, 2014 at 7:11
3
Solved
If I want to transfer a binary file "binary.bin" (located in the same directory as NetCat) to IP address 127.0.0.1 port 1200 using TCP, how do I specify this using NetCat for windows?
2
Solved
I am sending a command to a Teledyne LeCroy T3PS3000 power supply device over TCP Ethernet using netcat (nc) on Linux Ubuntu 18.04 and 20.04. If I use echo the device fails to properly receive the ...
9
Solved
Using ubuntu tusty, there is a service running on a remote machine, that I can access via port forwarding through an ssh tunnel from localhost:9999.
I have a docker container running. I need to ac...
Matthaeus asked 25/8, 2016 at 11:9
7
Solved
How to create a TCP connection using nc which listens to multiple hosts?
nc -l -p 12345
2
Solved
When I run the following command: nc -luvp 9090, I get the error: getnameinfo: Temporary failure in name resolution
I've scanned the internet in search of an answer, but none of them were valid:
...
Hootman asked 6/5, 2020 at 23:9
3
Solved
I have a project I'm working on, where a piece of Hardware is producing output that is continuously being written into a textfile.
What I need to do is to stream that file as it's being written ove...
Hindquarter asked 3/6, 2010 at 16:2
2
Solved
I am a beginner in docker . I have installed docker-ce in my ubuntu 18.04 machine using commandsudo apt install docker-ce
As part of a tutorial , I am trying to establish connection between contai...
5
Solved
Why does the following netcat command not time out if the attempt to connect takes longer than 3 seconds (ie: when the port isn't open)? I assumed that the -w flag would be what I needed. OS is OSX...
2
I need to sendo a lot of messages via netcat or something similar. The problem is that when I run echo "something" | netcat ip port the connection continues opened after I received the response. Ac...
2
What are .sock files?
How can I communicate with a .sock file?
Elaborating on the 2nd bullet, I understand that .sock files are for Inter-process communication. How can I 'communicate' with them...
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