Posted inlinux php

Speeding up your website using eaccelerator and memcache/memcached

Php default behaviour is always re-compile our script everytime accessed by users/browsers. eaccelerator can increases the performance of PHP scripts by caching them in their compiled state, so that the overhead of compiling is almost completely eliminated. It also optimizes scripts to speed up their execution. eAccelerator typically reduces server load and increases the speed of your PHP code by 1-10 times.

memcached is a high-performance, distributed memory object caching system, generic in nature, but intended for use in speeding up dynamic web applications by alleviating database load.

Here’s how to install eaccelerator extension

$ wget http://bart.eaccelerator.net/source/0.9.6/eaccelerator-0.9.6-rc1.tar.bz2
$ tar xjf eaccelerator-0.9.6-rc1.tar.bz2
$ cd eaccelerator-0.9.6-rc1
$ phpize
$ ./configure
$ make
$ sudo make install
$ cd /var/cache
$ sudo mkdir eaccelerator
$ sudo chown -R apache:apache eaccelerator
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Posted inipv6

Most Commonly Used ipv6 Command In My Windows XP Workstation

ipv6 if

This command displays interface information.

    D:\Documents and Settings\harry>ipv6 if 7
    Interface 7: Ethernet: Local Area Connection
      Guid {3FCF938D-344F-4515-8CA2-3FA8801C15C3}
      zones: link 7 site 2
      uses Neighbor Discovery
      uses Router Discovery
      link-layer address: 00-19-d1-ea-ee-16
        preferred global 2001:470:19:13c:219:d1ff:feea:ee16, life 29d23h59m59s/6d23h59m59s (public)
        preferred link-local fe80::219:d1ff:feea:ee16, life infinite
        multicast interface-local ff01::1, 1 refs, not reportable
        multicast link-local ff02::1, 1 refs, not reportable
        multicast link-local ff02::1:ffea:ee16, 2 refs, last reporter
      link MTU 1500 (true link MTU 1500)
      current hop limit 64
      reachable time 19000ms (base 30000ms)
      retransmission interval 1000ms
      DAD transmits 1
      default site prefix length 48

ipv6 rt

This command displays the current contents of the routing table.

    D:\Documents and Settings\harry>ipv6 rt
    ::/0 -> 7/fe80::20c:29ff:fe1e:b535 pref 256 life 26s (autoconf)
    2001:470:19:13c::/64 -> 7 pref 8 life 29d23h59m56s (autoconf)
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Posted indhcp

Toggle IP From Static to DHCP to Static Tool

I’ve created small tool(for windows XP/Vista), writen in visual basic 6.this tool was created for switching between static LAN ip to DHCP and back to original static IP (original IP saved in temporary variable) without opening network configuration, And without typing anything, just few mouse click is what we need. This tool using Windows Management Instrumentation for enumerating all network interface, get parameters, and set parameters.

Set objwmiservice = GetObject("winmgmts:\\.\root\cimv2")
Set colNIC_Config = objwmiservice.ExecQuery("Select * from Win32_NetworkAdapterConfiguration WHERE Index='" && _
                    Netconf.strIFIndex(CboIF.ListIndex) && "' AND IPEnabled=TRUE")

Tags: , 4
Posted inipv6

Naked Woman On IPv6

I found interesting stuff today. While i was submiting daily tests for hurricane electric.certification, i got this whois result:

[Querying whois.ripe.net]
[whois.ripe.net]
% This is the RIPE Database query service.
% The objects are in RPSL format.
%
% The RIPE Database is subject to Terms and Conditions.
% See http://www.ripe.net/db/support/db-terms-conditions.pdf

% Note: This output has been filtered.
%       To receive output for a database update, use the "-B" flag.

% Information related to '2001:820::/32'

inet6num:       2001:820::/32
netname:        NO-WEBONLINE-20020712
descr:          WebOnline A/S
country:        NO
org:            ORG-WAon1-RIPE
admin-c:        JH914-RIPE
tech-c:         WO1095-RIPE
mnt-by:         RIPE-NCC-HM-MNT
mnt-lower:      WEBONLINE
mnt-routes:     WEBONLINE
status:         ALLOCATED-BY-RIR
source:         RIPE # Filtered
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Posted inlinux

How to calculate linux user umask

Suppose we have umask 0002 for our user default permission. [bash] $ umask 0002 [/bash] Create new directory [bash] $ mkdir tmpdir [/bash] tmpdir directory created with its default permission 775 [bash] $ ls -l .......... .......... drwxrwxr-x 2 harry harry 4096 Oct 8 06:59 tmp .......... .......... [/bash] Create…
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Posted inipv6

WordPress HE IPv4 Exhaustion Counter Plugin

I've just create/modify small wrapper wordpress plugin for hurricane electric's ipv4 exhaustion counter widget. It's base on ipv4 exhaustion widget create by  GeertHauwaerts (create for IPv4 Exhaustion Counter made by Intec NetCore, Inc.) Installations Download the .zip package from here Upload it to your server and place the .zip file…
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Posted inmta postfix smtp

Postfix smtp outgoing load balancing

I got good workaround for balancing smtp outgoing from postfix mailing list archives(not using expensive real load balancer). suppose we have 4 smtp servers for outgoing email, and we need to configure/load balance like this:

                                                         +------------+
                                                         |            |
                    +----------> smtp backend a -------->|            |
                    |                                    |            |
clients --------> smtp lb -----> smtp backend b -------->|  Intenet   |
                    |                                    |            |
                    +----------> smtp backend c -------->|            |
                                                         |            |
                                                         +------------+

Here’s the configuration :

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Posted inUncategorized

Sumatera shaken by earthquake

A strong earthquake measuring 7.6 on the Richter scale rocked Sumatra at 5.16 pm Western Indonesian Standard Time.The earthquake occurred at 5.16 pm with its epicenter in West Sumatra at 0.84 degrees southern latitude, 99.65 degrees eastern longitude at a depth of 71 km below sea level.It was about 78…
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Posted inc programing

gethostbyname() vs getaddrinfo()

In IPv4 environment(usually) we used to call function gethostbyname() to do DNS lookups.then the information is load into a struct hostent.

#include <netdb.h>
struct hostent *gethostbyname(const char *name);

struct  hostent {
        char    *h_name;        /* official name of host */
        char    **h_aliases;    /* alias list */
        int     h_addrtype;     /* host address type */
        int     h_length;       /* length of address */
        char    **h_addr_list;  /* list of addresses from name server */
};
#define h_addr  h_addr_list[0]  /* address, for backward compatibility */

So, the easiest way to get information from gethostbyname() call is by extracting hostent structure.

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