netcat

第1章 概述 1.1 Flume定义 Flume是Cloudera提供的一个高可用的，高可靠的，分布式的海量日志采集、聚合和传输的系统。Flume基于流式架构，灵活简单。 下面我们来详细介绍一下Flume架构中的组件。 1.2.1 Agent Agent是一个JVM进程，它以事件的形式将数据从源头送至目的，是Flume数据传输的基本单元。 Agent主要有3个部分组成，Source、Channel、Sink。 1.2.2 Source Source是负责接收数据到Flume Agent的组件。Source组件可以处理各种类型、各种格式的日志数据，包括avro、thrift、exec、jms、spooling directory、netcat、sequence generator、syslog、http、legacy。 1.2.3 Channel Channel是位于Source和Sink之间的缓冲区。因此，Channel允许Source和Sink运作在不同的速率上。Channel是线程安全的，可以同时处理几个Source的写入操作和几个Sink的读取操作。 Flume自带两种Channel：Memory Channel和File Channel。 Memory Channel是内存中的队列。Memory Channel在不需要关心数据丢失的情景下适用。如果需要关心数据丢失

This question is following this one: Sockets working in openSUSE do not work in Debian? When working with sockets on my Debian system, I have to use nc -l -p port_number to simulate the server I want to talk with. If I'm using nc -l port_number, it will fail when using the socket connect function and strerror(errno) will say "Connection refused". Netcat without -p option is working great on other Linux distributions, what should I change on my configuration? I agree with duskwuff that it is better to just use the -p option everywhere, but to answer your question: The one thing you have to do

I encountered a little issue while using the nc utility on Mac OS X, a utility i often use as a quick and dirty solution to check if a port is open and what version the daemon is running. We deployed a new set of computers the other day and i wanted to verify what version of sshd they were running, without having to leave my chair. This is the command i ran and the resulting output: $ for i in {183..200}; do echo "hello" | nc -n -w 2 -v 10.120.113.$i 22; done Connection to 10.120.113.183 22 port [tcp/*] succeeded! SSH-2.0-OpenSSH_5.9 Protocol mismatch. nc: connect to 10.120.113.184 port 22

I'm trying to send a file, line by line, with the following commands: nc host port < textfile cat textfile | nc host port I've tried with tail and head , but with the same result: the entire file is sent as a unique line. The server is listening with a specific daemon to receive data log information. I'd like to send and receive the lines one by one, not the whole file in a single shot. How can I do that? Do you HAVE TO use netcat? cat textfile > /dev/tcp/HOST/PORT can also serve your purpose, at least with bash. I'de like to send, and receive, one by one the lines, not all the file in a

I am trying to set up a web server using only windows batch scripting. I have already come up with the following script: @echo off @setlocal enabledelayedexpansion for /l %%a in (1,0,2) do ( type tempfile.txt | nc -w 1 -l -p 80 | findstr mystring if !ERRORLEVEL! == 0 ( echo found > tempfile.txt ) else ( echo not-found > tempfile.txt ) ) However, the response is always one request behind, I mean, if I type something like this into the browser: REQUEST: localhost/mystring I will get the following response: RESPONSE: not-found Only in the next request I will receive the correct answer for the