# 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

Just run the following syntax…

Make sure no such entries inside: /etc/sysconfig/network and /etc/modprobe.conf file

# echo “NETWORKING_IPV6=no” >> /etc/sysconfig/network
# echo “alias ipv6 off” >> /etc/modprobe.conf
# echo “alias net-pf-10 off” >> /etc/modprobe.conf
# reboot (your server to make affect)

Once reboot-ed, do :

# 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
UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
RX packets:470471884 errors:1 dropped:0 overruns:0 frame:0
TX packets:464109169 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:2574513731 (2.3 GiB)  TX bytes:2255015395 (2.1 GiB)
Interrupt:225 Base address:0×2800

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 tiap detik email, chatting, etc selalu masuk.

Kemudian yang terjadi setelah tiba di Indonesia kaget dengan tagihan bulanan yang fantastis, untuk menghindari 2 hal diatas. Berikut saat ketika kita melakukan perjalanan keluar negeri:

1. Ketika kita tiba di suatu negara namun tidak mendapatkan network roaming partner di area tersebut, maka segera lakukan change network secara manual / update location network dengan cara masuk ke menu Options – Mobile Network – Network Selection Mode – Change from Automatic ke Manual – Scan Available for Network – Pilih Roaming Partner Operator Anda – Save.

2. Matikan layanan pada saat yg tidak tepat (tidur, mandi, makan malam, meeting, etc) dengan masuk ke menu Options – Mobile Network – Data Service change from On to Off atau Off When Roaming, atau bisa juga dari Manage Connections -Mobile Network Options – Data Services set ke : Off When Roaming. Sebagai informasi dengan mematikan layanan data service kita tetap dapat menerima Call, SMS dan MMS.

3. Jika anda pengguna layanan BlackBerry Internet Service (BIS) dan anda ingin layanan data tetap aktif sementara email account yg dipush ke handheld lebih dari 1 bahkan sampai 10 email account (apalagi jika email account tersebut tergabung dalam mailing list seperti yahoogroups), maka untuk sementara email2 yg kurang penting sebaiknya di nonaktifkan dengan cara login di blackberry webclient [operator_anda].blackberry.com pada menu email account lakukan delete email tersebut, lakukan add email account ketika kembali di Indonesia.

4. Non aktifkan semua layanan instant messaging terutama FaceBook. aktifkan layanan tersebut pada saat dibutuhkan.

5. Aktifkan koneksi WiFi ketika anda berada di area Free WiFi, tentunya fasilitas ini dapat dinikmati pada handheld yg ada feature Wifi seperti 8320, 8810, 8820, 9000, 8900, 8220 etc. Caranya Manage Connections – Setup Wifi – ikuti step2 berikutnya.

Source: Indosat Mobile

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

There are two ways for use this symbols.

1. Copy from here and paste in your facebook name, status or message.
2. These characters can be typed on your keyboard using the ALT button.

Desktop computer instructions for ALT facebook symbols:
• Press and hold left Alt key on your keyboard.
• While holding Alt key enter one of the codes below to get the corresponding symbol.
• Important note: You need to use numbers on the right side of the keyboard for entering code, not the numbers on top, otherwise they won’t work.

Laptop instructions for ALT facebook symbols:
• Press and hold left Alt key on your keyboard.
• While holding Alt key also press and hold Fn key.
• While holding Alt and Fn key enter one of the codes below to get corresponding symbol.
• Important note: You need to use numbers on the right side of the keyboard for entering code (they are usually written next to letters U, I, O… and in different color), not the numbers on top, otherwise they won’t work.

Alt + 1 ☺
Alt + 2 ☻
Alt + 3 ♥
Alt + 4 ♦
Alt + 5 ♣
Alt + 6 ♠
Alt + 7 •
Alt + 8 ◘
Alt + 9 ○
Alt + 10 ◙
Alt + 11 ♂
Alt + 12 ♀
Alt + 13 ♪
Alt + 14 ♫
Alt + 15 ☼
Alt + 16 ►
Alt + 17 ◄
Alt + 18 ↕
Alt + 19 ‼
Alt + 20 ¶
Alt + 21 §
Alt + 22 ▬
Alt + 23 ↨
Alt + 24 ↑
Alt + 25 ↓
Alt + 26 →
Alt + 27 ←
Alt + 28 ∟
Alt + 29 ↔
Alt + 30 ▲
Alt + 31 ▼

Here is the complete list of symbols Unicode. You can copy and paste these for use in your messages

♠ ♣ ♥
♦ ♪ ♫ ■ □ ▪ ▫ ▬ ▲ ►
▼ ◄ ◊ ○ ● ◘ ◙ ◦ ☺ ☻
☼ ♀ ▪ ▫ ▬ ☻
☺ ◙ ◘ ▀ € ♥
♂ ▒

๏ ๐ ๑ ๒
๓ ๔ ๕๖ ๗ ๘ ๙ ๚ ๛ Ẁ
ẁ Ẃ ẃ Ẅ ẅ Ạ ạ Ả ả Ấ
ấ Ầ ầẨ ẩ Ẫ ẫ Ậ ậ Ắ
ắ Ằ ằ Ẳ ẳ Ẵ ẵ Ặ ặ Ẹ
ẹ Ẻ ẻ Ẽ ẽ Ế ế Ề ề Ể
ể Ễ ễ Ệ ệ Ỉ ỉ Ị ị Ọ
Æ ¢ ™ Ð ¹ º ç Þ ß ÿ æ â ã ¥ ¤ £ ¦ ©
ª « ¬ ­® ¯

Ì Í Î Ï Ð Ñ Ò Ó Ô
Õ Ö × Ø Ù Ú Û Ü Ý Þ ß à á â ã ä å æ ç è é
ê ë ì í î ï ð ñ ò ó ô õ ö ÷ ø ù ú û ü ý þ ÿ Āā
Ăă Ąą Ć ć ĉ Ċ ċ ő Œ œ Ŕ
ŕ Ŗ ŗ Ř ř Ś ś Ŝ ŝ Ş ş Š
š Ţ ţ Ť ť Ŧ ŧ Ũ ũ Ū ū Ŭ
ŭ Ů ů Ű ű Ų ų Ŵ ŵ Ŷ ŷ Ÿ
Ź ź Ż ż Ž ž ſ ƒ Ǻ ǻ Ǽ ǽ
Ǿ ǿ ˆ ˇ ˉ ˘˙ ˚ ˛ ˜ ˝ ;
΄

₪ ₫ € ℅ l
№ ™ Ω e ⅛ ⅜ ⅝ ⅞ ∂ ∆ ∏
∑ – / · v 8 ∫ ˜ ≠ = = □ ▪ ▫ ◊
● ◦       
      fi fl ﬠ
שׁ שׂ שּׁ שּׂ אַ אָ אּ בּ גּ
דּהּ וּ זּ טּיּ ךּכּ לּ
מּנּ סּ ףּ פּ צּ קּרּ שּ
תּ וֹ בֿכֿ פֿ ﭏ ﭖ ﭗﭘ
ﭙ ﭺﭻ ﭼ

ﭽ ﮊ ﮋ
ﮎ ﮏ ﮐ ﮑ ﮒ ﮓ ﮔ ﮕ ﮤ
ﮥ ﯼ ﯽ ﯾ ﱞ ﱟ ﱠ ﱡ ﱢ
﴾ ﴿ ﷲ ﺀ ﺁ ﺂ ﺃ ﺄ ﺅ
ﺆ ﺇ ﺈ ﺉ ﺊ ﺋ ﺌ ﺍ ﺎ
ﺏﺐ ﺑ ﺒ ﺓ ﺔ ﺕ ﺖ ﺗ
ﺘ ﺙ ﺚ ﺛﺜ

ﺝ ﺞ ﺟ
ﺠ ﺡ ﺢ ﺣ ﺤ ﺥ ﺦ ﺧ ﺨ
ﺩﺪ ﺫ ﺬ ﺭ ﺮ ﺯ ﺰ
ﺱﺲ ﺳ ﺴ ﺵﺶ ﺷ ﺸﺹ
ﺺ ﺻ ﺼ ﺽﺾ ﺿ ﻀ ﻁ

ﻂ ﻃ
ﻄﻅ ﻆ ﻇ ﻈ ﻉﻊ ﻋ ﻌ
ﻍ ﻎ ﻏﻐ ﻑ ﻒ ﻓ ﻔ ﻕ
ﻖﻗ ﻘ ﻙ ﻚ ﻛ ﻜ ﻝﻞ
ﻟ ﻠ ﻡ ﻢ ﻣﻤ ﻥ ﻦ ﻧ
ﻨﻩ ﻪ ﻫ ﻬ ﻭ ﻮﻯ ﻰ
ﻱ ﻲ ﻳ ﻴﻵ ﻶ ﻷ ﻸﻹ
ﻺ ﻻ ﻼ

لم
ن ه و ى يً ٌ ٍ َ ُ
ِّ ْ % ٤ ٠ ١ ٢ ٣ ٥٦
٧ ٨ ٩ ﾎ 么 ﾒ _ ｬ `
ｦ _ ｶ ｼ ﾆ ♠ ♣
◄ ▬ ☻ ▬ ► ♣ ♠
Л п † ‡

█ ▌
▐ ░░▒▓
▓▒░░ ░░░▒▓
▓▒░░░

░▒▓
▓▒░ ▓▒░ ░▒▓
░░
▀▄▀▄▀▄▀▄▀▄
▄▀▄▀▄▀

═ ╬ ╦ ╩ ╦
╣╝╠ ╧ ╨ ╫ ╪
╥ ╤ ╢╡╟╞ ╜

⌠⌡│┌
┐└ ┘├ ┤┬ ┴ ┼
╛╚╙╘╗╖╕╔╓╒║

╬ ╫ ╪ ╩
╨ ╧ ╦ ╥ ╤ ╣ ╢ ╡ ╠ ╟
╞ ╝ ╜ ╛ ╚ ╙ ╗ ╘ ╗ ╖
╕ ╔ ╓ ╒ ║ ═

Enjoy them!

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

dnl # Sendmail, Chap 24.9.21, Page 960
dnl # Disable throttling the acceptance of new connections
define(`confCONNECTION_RATE_THROTTLE’,`0′)dnl

dnl # Sendmail, Chap 24.9.25, Page 967
dnl # Specify the maximum size, in bytes, of buffered df* files (default is
dnl #   4096 bytes; 0 turns this off and is not recommended)
define(`confDF_BUFFER_SIZE’,`16384′)dnl

dnl # Sendmail, Chap 24.9.60, Page 1011
dnl # Disable limit on the daemon spawning new children
define(`confMAX_DAEMON_CHILDREN’,`0′)dnl

dnl # Sendmail, Chap 24.9.66, Page 1016
dnl # Disbale limit on the number of messages that may be processed
dnl #  during any one queue run
define(`confMAX_QUEUE_RUN_SIZE’,`0′)dnl

dnl # Sendmail, Chap 24.9.19, Page 959
dnl # Turn on connection caching and set maximum number of simultaneous
dnl #  outbound connections kept open to 4; default is 2; this option also
dnl #  depends on MCI_CACHE_TIMEOUT (below)
define(`confMCI_CACHE_SIZE’,`4′)dnl

dnl # Sendmail, Chap 24.9.19, Page 959
dnl # Set time limit on how long a cached outbound connection may be
dnl #  kept open to 120 seconds (2 minutes) – see MCI_CACHE_SIZE above
define(`confMCI_CACHE_TIMEOUT’,`120s’)dnl

dnl # Sendmail, Chap 24.9.72, Page 1022
dnl # Disable time delay for queued messages not delivered on the first try
define(`confMIN_QUEUE_AGE’,`0′)dnl

dnl # Sendmail, Chapter 24.9.107, Page 1057
dnl # Disable MTA setting that forces MTA to queue each message and to sync
dnl #   to disk before forking (a system crash may result in lost mail)
define(`confSAFE_QUEUE’,`false’)dnl

dnl # Sendmail, Chap 24.9.109.13, Page 1065
dnl # Disable IDENT (RFC 1413) calls/turn off sending user-host verification
define(`confTO_IDENT’,`0′)dnl

dnl # Sendmail, Chap 24.9.120, Page 1077
dnl # Specify the maximum size, in bytes, of buffered xf* files (default is
dnl #   4096 bytes; 0 turns this off and is not recommended)
define(`confXF_BUFFER_SIZE’,`16384′)dnl

dnl # Sendmail, Chap 4.8.28, Page 192
dnl # Turn off E-Mail canonization (should be done by MSA, and this
dnl #     is a mail relay with no local users)
FEATURE(`nocanonify’)dnl

I’m assuming you’re using a modern version of sendmail – v8.12.10 or later. These settings may be different, or not exist at all, for older versions.

Source

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.

This happens due to unanticipated levels of interest when thousands of users visit the website, but the webmaster is unable to cope with them. Sometimes, the service may not go down but gets so slow that it becomes non-responsive. Such problems can be overcome.

Other causes of website failure include DoS attack (denial of service), which can also cause congestion and overload; poorly configured system components and out-of-date updates and patches on web servers.

The occasional outage is understandable and happens to all, but frequent downtime can cause delays in business. As we begin relying more on Web applications, Internet uptime is becoming more critical.

But there are things you can take care of to ensure you pave a smooth superhighway to your company’s website.

Content delivery networks (CDNs)

The public internet depends on content delivery networks to handle large amounts of media on huge sites like Amazon.com. Microsoft recently launched a free CDN to improve website performance. CDNs are made to route traffic onto private networks, thus removing the burden from the public website. In the absence of a CDN, sites with massive media files will be down immediately.

Better caching

One of the best and most popular ways of dealing with internet problems is to cache data that is frequently accessed. You can use Memcache or anything else and you will find several CMS packages that support this. But you must ensure you are careful with dynamic data.

Internet caching is similar to your computer memory caching, which holds the most popular content in a cached storage on the server to provide faster access. There are tier-caching products that help cache content within the website by making sure the content from the database is available even with there is a huge surge of traffic. This is one of the ways Twitter and Facebook deal with traffic surges.

Better programming

One of the new methods of dealing with traffic is to use better programming to withstand the sudden traffic spikes. Experts say that most websites cannot withstand any unanticipated traffic due to poor programming.

Using HTML5

Your website downtime is not always related to the hardware. HTML5 and other new standards have built-in mechanisms for increasing the reliability of websites. These involve advanced programming techniques. HTML5 is considered to be an important advance in browser capabilities.

Content optimization

You can optimize your static content by compressing images in order to make use of every kilobyte, but all the while making sure the visual quality does not get affected. You can also compress the content delivered by your web server. You can optimize your content management system by reducing the number of database calls you need to make for each page request. In Drupal, this is very simply done by disabling some of the modules. It is also advisable to separate the read and write databases.

Expires

One of the most important things is to add “expires” headers to content to ensure the same files are not downloaded continually as a user browses your website.

There is certainly no guarantee that your site will never go down. You will just have to find the right balance and implement what is necessary to ensure it has a high percentage of uptime.
Source