How to DISABLE ipv6 in CentOS5 System

echo “NETWORKING_IPV6=no” >> /etc/sysconfig/network
echo “alias ipv6 off” >> /etc/modprobe.conf
echo “alias net-pf-10 off” >> /etc/modprobe.conf
reboot
# ifconfig
eth1      Link encap:Ethernet  HWaddr 00:1C:F0:BB:A7:28
inet addr:10.10.10.11  Bcast:10.10.10.255  Mask:255.255.255.0
inet6 addr: fe80::21c:f0ff:febb:a728/64 Scope:Link
UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
RX packets:470449435 errors:1 dropped:0 overruns:0 frame:0
TX packets:464084402 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:2563674692 (2.3 GiB)  TX bytes:2243518951 (2.0 GiB)
Interrupt:225 Base address:0×2800
Don’t really [...]

Tips: Hemat Biaya saat Roaming International

Ada kekhawatiran para pengguna BlackBerry akan besarnya biaya roaming penggunaan GPRS saat berada di luar negeri, sehingga mereka tidak mengaktifkan layanan BlackBerry saat berada di luar negeri.
Tentunya solusi ini akhirnya malah merugikan karena aneh jika pengguna BlackBerry tidak update dengan informasi penting, dan sebaliknya karena ketidaktahuan akan biaya roaming seseorang selalu mengaktifkan layanan BlackBerry hampir [...]

Facebook Emoticons (Key ALT usage)

Facebook symbols are not part of facebook but can be inserted into your facebook name, chat window, messages, status, comments etc..
♪ = Musical note
♫ = Big musical note
♥ = Black heart
☺= Smile face
☻ = Black smile face

Optimizing Sendmail

Most of them involve changing the daemon’s configuration in /etc/sendmail.mc and rebuilding sendmail.cf
Specific things that can affect performance:
dnl # Sendmail, Chap 24.9.13, Page 955
dnl # Disable re-write of queue control file (will result in duplicates
dnl #   if the daemon is interrupted during a delivery)
define(`confCHECKPOINTINTERVAL’,`0′)dnl

How To Ensure Maximum Uptime For Your High-Traffic Business Website?

The word “catastrophic success” holds a lot of meaning here. It means an unusual surge in traffic that can bring a website to a complete halt. You have been successful at bringing traffic to your website but it proved to be catastrophic.