http://backdrift.org/howtonetworkbonding

muito bom

http://www.openinfosecfoundation.org/index.php/download-suricata

PArece interessante a ferramenta:

http://www.ossec.net/main/getting-started-with-ossec

Pelo que vi faz coisas como detecção de rootkit, bloqueio de webscanners, bloqueio contra tentativas de intrusao repetitivas, logs de alterações de arquivos, etc.

http://blog.alexos.com.br/?p=2650&lang=pt-br

http://blog.alexos.com.br/?p=2625&lang=pt-br

Adicionar para baixar timezone-data:

// listando discos virtuais
# MegaCli -LDInfo -Lall -aALL

// listando discos fisicos
# MegaCli -PDList -aALL | egrep 'Adapter|Enclosure|Slot|Inquiry'

// listando configuracao atual
# MegaCli -CfgDsply -aAll | egrep 'Reference|RAID|Slot|Data|^$'

Download do 4.00.11_Linux_MegaCLI.zip

dica: mover este arquivo para /etc/cron.weekly/

# scpresume server_origem:/home/arquivo/nome destino_arquivo

Adicionar no /etc/ssh_config
StrictHostKeyChecking no

intermediario# ssh SRV_Origem "cd /home; tar -cf - diretorio/; " | ssh SRV_Destino "cd /home; tar -xvf -"

Para montar este tipo de arquivo, primeiro deve ser lido o conteúdo, para isso use:
# fdisk -l -u arquivo.dd

Para montar, você deve fazer um calculo multiplicando o setor inicial x nr de bytes por setor, exemplo:

# fdisk -l -u x86_64.dd
You must set cylinders.
You can do this from the extra functions menu.

Disk VMware-VMvisor-big-171294-x86_64.dd: 0 MB, 0 bytes
64 heads, 32 sectors/track, 0 cylinders, total 0 sectors
Units = sectors of 1 * 512 = 512 bytes

 Device Boot      Start         End      Blocks   Id  System
x86_64.dd1            8192     1843199      917504    5  Extended
x86_64.dd4   *          32        8191        4080    4  FAT16 <32M
x86_64.dd5            8224      520191      255984    6  FAT16
x86_64.dd6          520224     1032191      255984    6  FAT16
x86_64.dd7         1032224     1257471      112624   fc  Unknown
x86_64.dd8         1257504     1843199      292848    6  FAT16

Neste caso para montar a 2 partição (8224) utilizariamos 8224*512:
# mount -t vfat -o loop,ro,offset=4210688 x86_64.dd diretorioDestino/

Uma distribuição voltada para criar um linux storage server, com nfs, iscsi target, smb...

AddType application/x-httpd-php .extensao
AddHandler application/x-httpd-php .extensao

Depois no host.destino.com:
(destino) ssh localhost -p 23456

Irá direcionar para origem

Segue um código promocional para ter 15% de desconto durante 3 meses:
Código promocional: BIGDESCONTO

veja também:
código promocional kinghost
código kinghost
15% de desconto kinghost
desconto kinghost

lado certificadora:
.crt = certificado do domínio gerado pela certificadora (-----BEGIN CERTIFICATE-----)
.ca = certificado da certificadora (-----BEGIN CERTIFICATE-----)

criando/gerando .pem

# cat #cert-privatekey# #cert-crt# #cert-ca# > cert.pem

gerando .csr

# openssl req -new -nodes -keyout cliente.key -out cliente.csr 

já era!

vou destacar 2 ferramentas, uma por ser em linux e outra por ser em windows....
1) siege para linux(http://www.joedog.org/JoeDog/Siege)
Ferramenta simples, não é nada difícil de utilizar...
Conheci esta ferramenta em uma palestra do criador do PHP Rasmus Lerdorf, no fisl 8 (http://talks.php.net/show/fisl08/7).

2) Ferramenta para windows, é uma ferramenta que vem junto com o Zend Server Community Edition, no Zend Controller, tem uma ferramenta simples para analise de requisições por segundo, pode ser útil para uma analise simples.

Abaixo segue uma lista detalhada que retirei de http://www.softwareqatest.com/qatweb1.html:

LoadStorm - A web-based load testing tool/service as a distributed application that leverages the power of Amazon Web Services to scale on demand with processing power and bandwidth as needed. As the test loads increase to hundreds or thousands of virtual users, LoadStorm automatically adds machines from Amazon's server farm to handle the processing. Tests can be built using the tool in such a way as to simulate a large number of different users with unique logins and different tasks.

BrowserMob - On-demand, self-service, low-cost, pay-as-you-go service enables simulation of large volumes of real browsers hitting a website. Utilizes Amazon Web Services, Selenium. Uses real browsers for each virtual user so that traffic is realistic, AJAX & Flash support is automatic. Browser screen shots of errors included in reports.

Load Impact - Online load testing service from Gatorhole/loadimpact.com for load- and stress- testing of your website over the Internet; access to our distributed network of load generator nodes - server clusters with very fast connections to enable simulation of tens of thousands of users accessing your website concurrently. Free low level load tests for 1-50 simulated users; higher levels have monthly fees.

Pylot - Open source tool by Corey Goldberg for generating concurrent http loads. Define test cases in an XML file - specify requests - url, method, body/payload, etc - and verifications. Verification is by matching content to regular expressions and with HTTP status codes. HTTP and HTTPS (SSL) support. Monitor and execute test suites from GUI (wxPython), and adjust load, number of agents, request intervals, rampup time, test duration. Real-time stats and error reporting are displayed.

AppLoader - Load testing app from NRG Global for web and other applications accessible from a Windows desktop; generates load from the end user's perspective. Protocol independent and supports a wide variety of enterprise class applications. Integrates with their Chroniker monitoring suite so results of load testing can be correlated with system behavior as load is increased. Runs from Win platforms.

fwptt - Open source tool by Bogdan Damian for load testing web applications. Capabilities include handling of Ajax. Generates tests in C#. For Windows platforms

JCrawler - An open-source stress-testing tool for web apps; includes crawling/exploratory features. User can give JCrawler a set of starting URLs and it will begin crawling from that point onwards, going through any URLs it can find on its way and generating load on the web application. Load parameters (hits/sec) are configurable via central XML file; fires up as many threads as needed to keep load constant; includes self-testing unit tests. Handles http redirects and cookies; platform independent.

vPerformer - Performance and load testing tool from Verisium Inc. to assess the performance and scalability of web apps. Use recorded scripts or customized scripts using Javascript. Targeted platforms: Windows

Curl-Loader - Open-source tool written in 'C', simulating application load and behavior of tens of thousand HTTP/HTTPS and FTP/FTPS clients, each with its own source IP-address. In contrast to other tools curl-loader is using real C-written client protocol stacks, namely, HTTP and FTP stacks of libcurl and TLS/SSL of openssl. Activities of each virtual client are logged and collected statistics include information about: resolving, connection establishment, sending of requests, receiving responses, headers and data received/sent, errors from network, TLS/SSL and application (HTTP, FTP) level events and errors.

RealityLoad XF On-Demand Load Testing - An on-demand load testing service (no licenses) from Gomez.com. Leverages Gomez' peer panel, which consists of over 15,000 end-user desktop testing locations distributed across the world, to provide distributed load tests that accurately reproduce the network and latency characteristics encountered by real users in a live environment.

OpNet LoadScaler - Load test tool from OpNet Technologies Inc. Create tests without programming; generate loads against web applications, and other services including Web Services, FTP, and Email. Record end-user browser activity in the OPNET TestCreatorTM authoring environment to automatically generate test scripts in industry-standard JavaScript. Modify, extend and debug tests with the included JavaScript editor. Alternatively, drag and drop icons onto the test script tree. No knowledge of a scripting language is required to customize test scripts.

StressTester - Enterprise load and performance testing tool for web applications from Reflective Solutions Ltd. Advanced user journey modeling, scalable load, system resources monitors and results analysis. No scripting required. Suitable for any Web, JMS, IP or SQL Application. OS independent.

The Grinder - A Java-based load-testing framework freely available under a BSD-style open-source license. Orchestrate activities of a test script in many processes across many machines, using a graphical console application. Test scripts make use of client code embodied in Java plug-ins. Most users do not write plug-ins themselves, instead using one of the supplied plug-ins. Comes with a mature plug-in for testing HTTP services, as well as a tool which allows HTTP scripts to be automatically recorded.

Proxy Sniffer - Web load and stress testing tool from from Ingenieurbüro David Fischer GmbH Capabilities include: HTTP/S Web Session Recorder that can be used with any web browser; recordings can then be used to automatically create optimized Java-based load test programs; automatic protection from "false positive" results by examining actual web page content; detailed Error Analysis using saved error snapshots; real-time statistics.

Testing Master - Load test tool from Novosoft, capabilities include IP spoofing, multiple simultaneous test cases and website testing features for sites with dynamic content and secure HTTPS pages.

Funkload - Web load testing, stress testing, and functional testing tool written in Python and distributed as free software under the GNU GPL. Emulates a web browser (single-threaded) using webunit; https support; produces detailed reports in ReST, HTML, or PDF.

Avalanche - Load-testing appliance from Spirent Communications, designed to stress-test security, network, and Web application infrastructures by generating large quantities of user and network traffic. Simulates as many as two million concurrently-connected users with unique IP addresses, emulates multiple Web browsers, supports Web Services testing Supports HTTP 1.0/1.1, SSL, FTP, RTSP/ RTP, MS Win Media, SMTP, POP3, DNS, Telnet, and Video on Demand over Multicast protocols.

Loadea - Stress testing tool runs on WinXP; free evaluation version for two virtual users. Capture module provides a development environment, utilizes C# scripting and XML based data. Control module defines, schedules, and deploys tests, defines number of virtual users, etc. Analysis module analyzes results and provides reporting capabilities.

LoadManager - Load, Stress, Stability and Performance testing tool from Alvicom. Runs on all platforms supported by Eclipse and Java.

QEngine Web Performance Testing - Automated testing tool from AdventNet for performance testing (load and stress testing) of web applications and web services. For Linux and Windows.

NeoLoad - Load testing tool for web applications from Neotys with clear and intuitive graphical interface, no scripting/fast learning curve, clear and comprehensive reports and test results. Can design complex scenarios to handle real world applications. Features include data replacement, data extraction, SOAP support, system monitoring (Windows, Linux, IIS, Apache, WebLogic, Websphere...), SSL recording, PDF/HTML/Word reporting, IP spoofing, and more. Multi-platform: Windows, Linux, Solaris.

Test Complete Enterprise - Automated test tool from AutomatedQA Corp. includes web load testing capabilities.

QTest - Web load testing tool from Quotium Technologies SA. Capabilities include: cookies managed natively, making the script modelling phase shorter; HTML and XML parser, allowing display and retrieval of any element from a HTML page or an XML flux in test scripts; option of developing custom monitors using supplied APIs; more.

Test Perspective Load Test - Do-it-yourself load testing service from Keynote Systems for Web applications. Utilizes Keynote's load-generating infrastructure on the Internet; conduct realistic outside-the-firewall load and stress tests to validate performance of entire Web application infrastructure.

SiteTester1 - Load test tool from Pilot Software Ltd. Allows definition of requests, jobs, procedures and tests, HTTP1.0/1.1 compatible requests, POST/GET methods, cookies, running in multi-threaded or single-threaded mode, generates various reports in HTML format, keeps and reads XML formatted files for test definitions and test logs. Requires JDK1.2 or higher.

httperf - Web server performance/benchmarking tool from HP Research Labs. Provides a flexible facility for generating various HTTP workloads and measuring server performance. Focus is not on implementing one particular benchmark but on providing a robust, high-performance, extensible tool. Available free as source code.

NetworkTester - Tool (formerly called 'NetPressure') from Agilent Technologies uses real user traffic, including DNS, HTTP, FTP, NNTP, streaming media, POP3, SMTP, NFS, CIFS, IM, etc. - through access authentication systems such as PPPOE, DHCP, 802.1X, IPsec, as necessary. Unlimited scalability; GUI-driven management station; no scripting; open API. Errors isolated and identified in real-time; traffic monitored at every step in a protocol exchange (such as time of DNS lookup, time to logon to server, etc.). All transactions logged, and detailed reporting available.

WAPT - Web load and stress testing tool from SoftLogica LLC. Handles dynamic content and HTTPS/SSL; easy to use; support for redirects and all types of proxies; clear reports and graphs.

Visual Studio Team System 2008 Test Edition - A suite of testing tools for Web applications and services that are integrated into the Microsoft Visual Studio environment. These enable testers to author, execute, and manage tests and related work items all from within Visual Studio.

OpenLoad - Affordable and completely web-based load testing tool from OpenDemand; knowledge of scripting languages not required - web-based recorder can capture and translate any user action from any website or web application. Generate up to 1000 simultaneous users with minimum hardware.

Apache JMeter - Java desktop application from the Apache Software Foundation designed to load test functional behavior and measure performance. Originally designed for testing Web Applications but has since expanded to other test functions; may be used to test performance both on static and dynamic resources (files, Servlets, Perl scripts, Java Objects, Data Bases and Queries, FTP Servers and more). Can be used to simulate a heavy load on a server, network or object to test its strength or to analyze overall performance under different load types; can make a graphical analysis of performance or test server/script/object behavior under heavy concurrent load.

TestMaker - Free open source utility maintained by PushToTest.com and Frank Cohen, for performance, scalability, and functional testing of Web application. Features test authoring of Web applications, Rich Internet Applications (RIA) using Ajax, Service Oriented Architecture, and Business Process Management environments. Integrates Selenium, soapUI, TestGen4Web, and HTMLUnit to make test development faster/easier. Repurposes tests from these tools into load and performance tests, functional tests, and business service monitors with no coding. Repurposes unit tests written in Java, Jython, JRuby, Groovy, and other dynamic scripting languages. Runs on any platform.

SiteStress - Remote, consultative load testing service by Webmetrics. Simulates end-user activity against designated websites for performance and infrastructure reliability testing. Can generate an infinitely scalable user load from GlobalWatch Network, and provide performance reporting, analysis, and optimization recommendations.

Siege - Open source stress/regression test and benchmark utility; supports basic authentication, cookies, HTTP and HTTPS protocols. Enables testing a web server with a configurable number of concurrent simulated users. Stress a single URL with a specified number of simulated users or stress multiple URL's simultaneously. Reports total number of transactions, elapsed time, bytes transferred, response time, transaction rate, concurrency, and server response. Developed by Jeffrey Fulmer, modeled in part after Lincoln Stein's torture.pl, but allows stressing many URLs simultaneously. Distributed under terms of the GPL; written in C; for UNIX and related platforms.

JBlitz - Load, performance and functional test tool from Clan Productions. Runs multiple concurrent virtual users.to simulate heavy load. Validates each response using plain text or regular expression searches, or by calling out to your own custom code. Full Java API. For testing and 'bullet-proofing' server side software - ASPs, JSPs, servlets, EJBs, Perl / PHP / C / C++ / CGI scripts etc.

WebServer Stress Tool - Web stress test tool from Paessler AG handles proxies, passwords, user agents, cookies, AAL.

Web Polygraph - Freely available benchmarking tool for caching proxies, origin server accelerators, L4/7 switches, and other Web intermediaries. Other features: for high-performance HTTP clients and servers, realistic traffic generation and content simulation, ready-to-use standard workloads, powerful domain-specific configuration language, and portable open-source implementation. C++ source available; binaries avail for Windows.

OpenSTA - 'Open System Testing Architecture' is a free, open source web load/stress testing application, licensed under the Gnu GPL. Utilizes a distributed software architecture based on CORBA. OpenSTA binaries available for Windows.

PureLoad - Java-based multi-platform performance testing and analysis tool from Minq Software. Includes 'Comparer' and 'Recorder' capabilities, dynamic input data, scenario editor/debugger, load generation for single or distributed sources.

ApacheBench - Perl API for Apache benchmarking and regression testing. Intended as foundation for a complete benchmarking and regression testing suite for transaction-based mod_perl sites. For stress-testing server while verifying correct HTTP responses. Based on the Apache 1.3.12 ab code. Available via CPAN as .tar.gz file.

Torture - Bare-bones Perl script by Lincoln Stein for testing web server speed and responsiveness and test stability and reliability of a particular Web server. Can send large amounts of random data to a server to measure speed and response time of servers, CGI scripts, etc.

WebSpray - Low-cost load testing tool from CAI Networks; includes link testing capabilities; can simulate up to 1,000 clients from a single IP address; also supports multiple IP addresses with or without aliases. For Windows.

eValid LoadTest - Web test tool from Software Research, Inc that uses a 'Test Enabled Web Browser' test engine that provides browser based 100% client side quality checking, dynamic testing, content validation, page performance tuning, and webserver loading and capacity analysis.

WebPerformance Load Tester - Load test tool emphasizing ease-of-use, from WebPerformance Inc. Supports all browsers and web servers; records and allows viewing of exact bytes flowing between browser and server; no scripting required. Modem simulation allows each virtual user to be bandwidth limited. Can automatically handle variations in session-specific items such as cookies, usernames, passwords, IP addresses, and any other parameter to simulate multiple virtual users. For Windows, Linux, Solaris, most UNIX variants.

WebSuite - A collection of load testing, capture/playback, and related tools from Technovations for performance testing of web sites. Modules include WebCorder, Load Director, Report Generator, Batch, Manager, and others. WebSizr load testing tool supports authentication, SSL, cookies, redirects. Recorded scripts can be modified manually. For Windows.

FORECAST - Load testing tool from Facilita Software for web, client-server, network, and database systems. Capabilities include proprietary, Java, or C++ scripting; windows browser or network recording/playback. Supports binary encoded data such as Adobe Flex/AMF, Serialised Java objects etc.SSL; supports NTLM, kerberos, proxies, authentication, redirects, certificates, cookies, caching, bandwidth limitation and page validation. Virtual user data can be parameterized. Works with a wide variety of platforms.

http-Load - Free load test application from ACME Labs to generate web server loads, from ACME Software. Handles HTTP and HTTPS; for Unix.

QALoad - Compuware's tool for load/stress testing of web, database, and character-based systems. Supports HTTP, SSL, SOAP, XML, Streaming Media. Works with a variety of databases, middleware, ERP.

Microsoft WCAT load test tool - Web load test tool from Microsoft for load testing of MS IIS servers; other MS stress tools also listed.

IBM Rational Performance Tester - Performance testing tool from IBM/Rational; has optional extensions to Seibel applications and SAP Solutions. Supports Windows, Linux and z/OS as distributed controller agents; provides high-level and detailed views of tests.

SilkPerformer - Enterprise-class load-testing tool from Borland (formerly Segue). Can simulate thousands of users working with multiple protocols and computing environments. Allows prediction of behavior of e-business environment before it is deployed, regardless of size and complexity.

Radview's WebLoad - Load testing tool from Radview Software. Capabilities include over 75 Performance Metrics; can view global or detailed account of transaction successes/failures on individual Virtual Client level, assisting in capturing intermittent errors; allows comparing of running test vs. past test metrics. Test scripting via visual tool or Javascript. Wizard for automating non-GUI-based services testing; DoS security testing.

Loadrunner - HP's (formerly Mercury's) load/stress testing tool for web and other applications; supports a wide variety of application environments, platforms, and databases. Large suite of network/app/server monitors to enable performance measurement of each tier/server/component and tracing of bottlenecks.

Quando isso ocorre com frequência, pode ser culpa da resolução de nomes, resolução de DNS.

O serviço é www.gigadns.com.br, o serviço conta com a assinatura de qualidade KingHost/Cyberweb.

Para você que precisa de uma hospedagem inteligente e principalmente de qualidade com preços baixos, recomendo a kinghost, abaixo segue código promocional na kinghost para ganhar 15% de desconto nas 3 primeiras mensalidades!
Código promocional kinghost: BIGDESCONTO

Ou abra a URL abaixo: http://www.kinghost.com.br/promo/bigdesconto.html

bem interessante, utilizado pelo gravatar para publicação das imagens..

Lançaram agora hospedagem com suporte a linux com lighttpd. Fizeram uma página no painel de controle aonde é possível configurar o mod rewrite (que no lighttpd não tem .htaccess) e configurar diversas diretivas como: diretory index, diretory autentication, mime-types, file cache... simplismente mto bom...

Não existe um plano especial para lighttpd, quando o cara assina cai direto no apache e pode solicitar migração para lighttpd através de ticket (nesta primeira fase disseram que vai ser assim, mas logo será opcional a mudança através do painel de controle). Simplismente eu escolho se quero trabalhar com apache ou lighttpd!

Testei e aprovei... para quem quiser testar, consegui um código promocional...

ganhe 15% de desconto nos 3 primeiros meses.

Utilize o código promocional: BIGDESCONTO
no passo 3 do cadastro

nunca foi tão fácil ganhar desconto hein…

Character	Action
>	Redirect standard output
2>	Redirect standard error
2>&1	Redirect standard error to standard output
<	Redirect standard input
|	Pipe standard output to another command
>>	Append to standard output
2>&1|	Pipe standard output and standard error to another command

na verdade da pra ver muito mais que placa mãe, versão de bios, memórias e slots disponíveis.

utilize dmidecode para ver as informações no linux

conteúdo /usr/share/zoneinfo/America/Sao_Paulo /usr/share/zoneinfo/America/Sao_Paulo

Rule BrazilSP 2008 only - Oct 19 0:00 1:00 S
Rule BrazilSP 2009 only - Feb 15 0:00 0 -

# Zone NAME GMTOFF RULES/SAVE FORMAT [UNTIL]
Zone America/Sao_Paulo -3:00 BrazilSP BR%sT


4) criar zic
5) novo link para localtime
6) atualize o horário por ntp

# zic /usr/share/zoneinfo/America/Sao_Paulo /usr/share/zoneinfo/America/Sao_Paulo
# ln -s /usr/share/zoneinfo/America/Sao_Paulo /etc/localtime
# /usr/sbin/ntpdate pool.ntp.org


Utilize o código promocional: BIGDESCONTO
no passo 3 do cadastro

nunca foi tão fácil ganhar desconto hein...

Planos Rails
primeiro sobre os planos, achei os planos que suportam ruby on rails são muito em conta em comparação as outras empresas e a qualidade do serviço... a partir de R$ 17,00 já tem hospedagem com suporte a ruby on rails.

Ativação da conta
na ativação da conta, veio a explicação de como criar e utilizar o ruby on rails, mto direta e simplificada.

Painel de controle
no painel de controle, foi muito fácil criar a aplicação e aqui achei a principal diferença, tem como criar 2 aplicações em rails.
Ou seja, se você tem seu blog em rails e seu sistema em rails, você pode criar uma aplicação para cada um, utilizando em subdiretórios diferentes. Muito bom mesmo, pq em todas as outras empresas que utilizei só tinha como criar 1 aplicação... show de bola...

No painel de controle, tem como ver as gems instaladas e versões do rails e do ruby, restartar a aplicação e ver os logs da aplicação.

Legal que se a aplicação ta dando algum erro, você ta com pressa, pode entrar só no painel de controle e ver o que pode estar gerando o erro.

Instalação de gem
Consegui instalar gem sem problema nenhum, instalei a brazilian-rails.
O bacana que as gems eu que seleciono as gems que irei utilizar, e ficam isoladas para minha aplicação. Posso utilizar uma versão diferente da instalada no servidor sem problema nenhum. Ótimo para resolver algum probleminha de hospedagem

Controle de versão (GIT / SVN)
É possível efetuar utilização de GIT over ssh, muito bacana, só criei pra testar, utilizei sem problemas nenhum.

O SVN da kinghost é muito bom, facilita a publicação do repositório...
como? os caras criaram um sistema mais inteligente de auto-export no commit, avisa por e-mail ainda os arquivos modificados... simplismente mtooo bom...

Performace
fiquei realmente impressionado com a performace, tanto de link quanto de processamento da aplicação...

Coloquei a aplicação web de um cliente lá, fica geralmente de 30 a 50 pessoas conectadas no sistema e só me reportaram coisas positivas...

---

desconto na assinatura kinghost
se não bastasse tudo isso, ainda consegui um desconto na hora da assinatura...
para quem quiser testar lá, consegui um código promocional da kinghost que dá 10% de desconto nos 3 primeiros meses, na hora do cadastro é só digitar BIGDESCONTO na hora do cadastro...

baixe o ultimate boot cd

tks jb

http://www.nongnu.org/dmidecode/

vejamos o exemplo a seguir, quero executar um script que limpa os registros do banco de dados durante todo o minuto, durante todos os dias do ano, então fica assim:
* * * * * /usr/local/bin/php /home/franklinjr/limpa_base.php

fonte e +detalhes: http://www.franklinjr.com/blog/index.php/2008/09/16/como-configurar-uma-cronjob/
ps: mto bom franklin! aheuaheuaehae

# comando 2>&1

e colocar para efetuar o boot e trocar a senha

/etc/profile.env

se não tiver instalado no seu sistema, baixe em:

http://www.caliban.org/bash/index.shtml#completion

----
calculando na shell,
echo $((154*1024*1024))

windows (limpa até cache negativo):
net stop dnscache & net start dnscache & ipconfig /flushdns

se fudendo e aprendendo...

chega de se matar com o minicom para configurar switch...

-------------------------------------------------------------------------------------------
O HyperTerminal é um programa que você pode utilizar para conectar-se a computadores e/ou dispositivos de rede usando um modem, um cabo null modem ou uma conexão TCP/IP. Este aplicativo é geralmente utilizado por administradores de rede para fazer a configuração de roteadores e/ou switches através da interface de console.

Apesar do HyperTerminal ser uma excelente ferramenta ele só existe para ambiente Windows, ou seja, o HyperTerminal acaba por amarrar o usuário ao sistema operacional (o que nem sempre é produtivo). Uma alternativa ao HyperTerminal é utilizar o C-Kermit.

C-Kermit é um programa que combina softwares para comunicação serial e de rede. Ele já é instalado por default na grande maioria das distribuições Linux, mas pode ser instalado e portado para outros ambientes (FreeBSD, NetBSD, OpenBSD, Solaris, etc) sem maiores problemas.

Ao contrário do HyperTerminal, o C-Kermit (ou somente Kermit) não possui uma interface gráfica que torne a sua utilização intuitiva. Além disso, também não é tão fácil encontrar documentação clara a respeito de como devem ser efetuadas as configurações e tão pouco scripts de exemplo na Internet. Por isso, estou publicando no blog alguns dos scripts que utilizo para o trabalho do dia-a-dia e que são extremamente úteis.

Para executar os scripts basta executar:

# kermit nome_do_arquivo

1. Utilizando a interface serial do seu micro para se conectar a console de um roteador ou switch (salvar comandos abaixo no arquivo serial.txt).

log session serial.log
set line /dev/ttyS0
set speed 9600
set serial 8N1
set carrier-watch off
connect
close connection
quit

2. Utilizando a interface serial do seu micro para se conectar a um modem externo (salvar comandos abaixo no arquivo modem.txt).

log session modem.log
set line /dev/ttyS0
set modem type generic
set modem data-compression off
set modem error-correction off
set flow-control /modem rts/cts
set modem speed-matching on
set serial 8N1
set carrier-watch off
dial número_do_telefone
connect
close connection
quit

3. Utilizando o Kermit para efetuar um telnet para um equipamento. Utilizado para acessar equipamentos remotos onde não se possui acesso a console (salvar comandos abaixo no arquivo telnet.txt)

log session telnet.log
set input echo off
set host /nowait IP PORTA /telnet
connect
close connection
quit

4. Utilizando o Kermit para abrir um raw socket para um equipamento. Muito utilizado para se conectar a servidores de console (veja artigo em http://www.networkcomputing.com/showitem.jhtml?docid=1519f3) (salvar comandos abaixo no arquivo raw.txt)

log session raw.log
set input echo off
set host IP PORTA /raw-socket
connect
close connection
quit

Dicas importantes!

1. Sempre que for finalizar uma conexão a sequência de escape a ser utilizada é a seguinte: "Ctrl+\ , c". Este item é muito importante para não deixar as sessões presas.
2. Caso precise enviar um Ctrl+Break para o equipamento a sequência de escape é "Ctrl+\ , b"
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adicione a lista de pacotes dependentes!

rpm -e --allmatches pacote dep-1 dep2 dep3

> /etc/udev/rules.d/70-persistent-net.rules

valeu jb!

echo colorido no shell! lindo! =)

no arquivo .htaccess dentro do diretório coloque:
#Desabilitar PHP
php_flag engine off
ou
#Desabilitar PHP
php_admin_flag engine off

para ficar como texto os arquivos:
AddType text/plain .php
AddType text/plain .phtml
AddType text/plain .php4
AddType text/plain .php3

no: /etc/selinux/config
troque:
SELINUX=enforcing
por:
SELINUX=disabled
e comenta o resto que estiver ativo

e reboot no server...

valeu jóris bredowww! =)

ver opcoes de copilacao
# emerge mysql -pv
Calculating dependencies... done!
[ebuild U ] dev-db/mysql-5.0.54 [5.0.44-r2] USE="berkdb perl ssl -big-tables -cluster -debug -embedded -extraengine -latin1 -max-idx-128 -minimal (-selinux) -static" 26,860 kB

modificando
USE="big-tables latin1 -ssl" emerge mysql

valeu joris bredowww