while x=1; do /System/Library/PrivateFrameworks/Apple80211.framework/Versions/Current/Resources/airport -I | grep CtlRSSI; sleep 0.5; done

it returns a value in dBm, the wireless radio signal strength.

Here’s the shortcut key: Cmd+Y

Shall have knew about this sooner!

To turn Spotlight Indexing OFF in MAC OS X 10.6 Snow Leopard
sudo mdutil -a -i off

To turn Spotlight Indexing ON in MAC OS X 10.6 Snow Leopard
sudo mdutil -a -i on

Just type the respective command in terminal.
If this don’t help you may follow the instruction on the link in reference.

Reference: Spotlight won’t work?

Inside the iPhoto Library Package, there are four SQLite databases (face_blob.db, face.db, iPhotoAux.db and iPhotoMain.db). I found that by vacuuming all four of these databases, I restored iPhoto ’09′s performance back to something on par with its predecessor.

Open Terminal and cd into your iPhoto Library (by default, cd “~/Pictures/iPhoto Library”). Once there, execute the following command:
for dbase in *.db; do sqlite3 $dbase “vacuum;”; done

Source: macosxhints : Speed up iPhoto ’09 by vacuuming its databases

Go to “Settings”, “Mail, Contacts, Calendars”,

Select “Add Account…” under Mail,

Select “Other”,

Choose “Add Mail Account”,

Enter your account info, note that address to be your full @hotmail.com or @live.com address, as shown,

click on “Save” and the account will automatically be configure, setup and verified.

Once verified, you shall see the following information under your Hotmail account settings.

and you are good to go!, sadly, hotmail only have support for POP, lagging IMAP, meaning no synchronization. well, pretty microsoft.

then for those who wants to setup Hotmail on Apple Mail, i assume you are a proficient enough user to no need print screens, the information are as follows:
Incoming Server: pop3.live.com (Port 995)
username: yourusername@hotmail.com OR yourusername@live.com
Outgoing Server (SMTP Server): smtp.live.com (Port 25)
Make sure SSL is checked, your outgoing port is 25 and authentication is required.

If anyone need a step by step with print screen, post in comments and i will add it in.

that when i learnt about this hidden function of mac call Safe Sleep from MacWorld, is one very old article, but is very relevant, you can go over to macworld to read more, i am just going to record a few important points here.

to check current setting: (in terminal)
pmset -g | grep hibernatemode
the output will be something like:
hibernatemode 3

the 3 here indicates the mode, other mode incldues,
0 – Old style sleep mode, with RAM powered on while sleeping, safe sleep disabled, and super-fast wake.
1 – Hibernation mode, with RAM contents written to disk, system totally shut down while “sleeping,” and slower wake up, due to reading the contents of RAM off the hard drive.
3 – The default mode on machines introduced since about fall 2005. RAM is powered on while sleeping, but RAM contents are also written to disk before sleeping. In the event of total power loss, the system enters hibernation mode automatically.
5 – This is the same as mode 1, but it’s for those using secure virtual memory (in System Preferences -> Security).
7 – This is the same as mode 3, but it’s for those using secure virtual memory.

my mac current mode is 3, and really i don’t really need safe sleep, so m gng to jus switch mine to 0.
in terminal again, type:
sudo pmset -a hibernatemode 0

alright, now in terminal again,
sudo rm /var/vm/sleepimage

4gb of hdd space recovered! imaging the new mac with 8gb of ram! gosh, that will be 8gb of hdd saved man!
but ok, if you ever lost power while in sleep mode, you lost everything! depends on how you weigh the importance.

Source:
Set newer portable Mac’s sleep mode
How to Quickly Sleep Your MacBook

Quite dump on Disk Utility to not automatically resolve this problem.

chflags -R nouchg <directory-name>

simply open terminal and type the above command in, it will recursively unlock all folders and files in that directory, the same goes if you are unlocking one file only:
chflags nouchg <dir-fileName>

So the problem here is Gmail IMAP offer a very good means for almost everyone to sync their email in mail, iphone and thunderbird etc (outlook sucks in imap features, especially with gmail). BUT the “All Mail” label in gmail can get quite irritating when u start seeing duplicates emails in your “Inbox” and “All Mail” folder. and even more irritating when search produce 2 email of exact same thing from the 2 folders, of cos, there was recommendation like this to remove it from spotlight, but if your gmail account have 4gb of email, you are actually using 8gb to cache 4gb of your email.

So come “Advance IMAP Setting for Gmail”, simply go to “Settings” then under the “Labs” tab, search for:
Advance IMAP Controls

Enable it, and simply go to the “Filters” tab to exclude your “All Mails” label from showing in IMAP.

You can read more about this in google’s blog linked below.

Source: Google System Blog – Advanced IMAP Settings for Gmail

# cat /dev/null > /private/var/log/apache2/error_log

that simple! and the error_log file is emptied.
simplest method, fast and easy way to empty any file