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14.4. Configuring Static Routes

Routing will be configured on routing devices, therefore it should not be necessary to configure static routes on Red Hat Enterprise Linux servers or clients. However, if static routes are required they can be configured for each interface. This can be useful if you have multiple interfaces in different subnets. Use the route command to display the IP routing table.

Static route configuration is stored in a /etc/sysconfig/network-scripts/route-interface file. For example, static routes for the eth0 interface would be stored in the /etc/sysconfig/network-scripts/route-eth0 file. The route-interface file has two formats: IP command arguments and network/netmask directives.

IP Command Arguments Format

Define a default gateway on the first line. This is only required if the default gateway is not set via DHCP:

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http://eulersolutions.fr.yuku.com/
https://code.google.com/p/projecteuler-solutions/
https://wiki.python.org/moin/ProblemSets/Project%20Euler%20Solutions
http://www.nayuki.io/page/project-euler-solutions



 1. 233168
 2. 4613732
 3. 6857

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install tat ca cac goi: (libexpat1-dev libfontconfig1-dev libfreetype6-dev libice-dev libjbig-dev
  libjpeg-dev libjpeg-turbo8-dev libjpeg8-dev liblzma-dev libpng12-dev
  libpthread-stubs0-dev libsm-dev libtiff5-dev libtiffxx5 libvpx-dev
  libx11-dev libx11-doc libxau-dev libxcb1-dev libxdmcp-dev libxpm-dev
  libxt-dev x11proto-core-dev x11proto-input-dev x11proto-kb-dev
  xorg-sgml-doctools xtrans-dev zlib1g-dev)
  
$ sudo apt-get install libgd2-dev

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When I tried to use arrow keys in insert mode in vi editor the following characters are being inserted in the editor:

for ↓ I get B,
for ↑ I get A,
for ← I get D,
for → I get C.

====> 

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Easy handle interface

Options

• CURLOPT_DNS_CACHE_TIMEOUT: controls the TTL of a DNS cache entry. The default is 60s. Use -1 to keep the entry forever.
• CURLOPT_RESOLVE: pre-populate the DNS cache manually.
• CURLOPT_DNS_SERVERS: use alternate DNS servers (instead of system default ones). Warning: works only with c-ares (and it requires c-ares version >= 1.7.4),
• CURLOPT_DNS_USE_GLOBAL_CACHE: cache DNS queries between easy handles. Warning: this is not thread-safe and documented as deprecated. Use the share interface instead (see below).

Info

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libevent vs libuv

Comparing libevent and libuv. My upfront biased: I want to like libevent. However, I want to objectively compare the two and make an informed decision.

What versions are we comparing?

• libevent 2.0.22 (Stable) [2014-01-05]
• libuv 1.8.0 (Stable) [2015-12-15]

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#include <string>
#include <ctime>
#include <msgpack.hpp>

struct message
{
  std::string tag;
  std::time_t time;
  std::string text;
  MSGPACK_DEFINE(tag, time, text);

thanhtam92

find command:http://www.oreillynet.com/linux/cmd/cmd.csp?path=f/find

find . -maxdepth 1/2/..../n

%to just find them and printout:
find . -maxdepth 1 -name '[!.]*' -size 0 -printf 'Name: %16f Size: %6s\n'
%delete them, may be modified to use
find . -maxdepth 1 -name '[!.]*' -size 0 -printf 'Name: %16f Size: %6s\n' | xargs rm
http://content.hccfl.edu/pollock/unix/findcmd.htm

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ZeroMQ vs Redis

This document is research for the selection of a communication platform for robot-net.

Goal

The purpose of this component is to enable rapid, reliable, and elegant communication between the various nodes of the network, including controllers, sensors, and actuators (robot drivers). It will act as the core of robot-net to create a standardized infrastructure for robot control.

Requirements:

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cmake_minimum_required(VERSION 2.8)

# Return the date (yyyy-mm-dd)
macro(DATE RESULT)
	if(WIN32)
		execute_process(COMMAND "cmd" " /C date /T" OUTPUT_VARIABLE ${RESULT})
		string(REGEX REPLACE "(..)/(..)/(....).*" "\\3-\\2-\\1" ${RESULT} ${${RESULT}})
	elseif(UNIX)
		execute_process(COMMAND "date" "+%Y-%m-%d" OUTPUT_VARIABLE ${RESULT})
	else()