OSX Key: Keyboard Shortcut To Sleep, Log Out, & Shut Down

You might need to press and hold some shortcuts slightly longer than others. This helps you to avoid using them unintentionally.

Press to turn on your Mac or wake it from sleep. Press and hold for 1.5 seconds to put your Mac to sleep.* Continue holding to force your Mac to turn off.

power

Put your Mac to sleep.

option–command–power* or 
option–command–eject 

Put your displays to sleep.

control–shift–power* or 
control–shift–eject 

Display a dialog asking whether you want to restart, sleep, or shut down.

control–power* or 
control–eject 

Force your Mac to restart, without prompting to save any open and unsaved documents.

control–command–power* 

Quit all apps, then restart your Mac. If any open documents have unsaved changes, you will be asked whether you want to save them.

control–command–eject 

Quit all apps, then shut down your Mac. If any open documents have unsaved changes, you will be asked whether you want to save them.

control–option–command–power* or 
control–option–command–eject 

Immediately lock your screen.

control-command-q

Log out of your macOS user account. You will be asked to confirm. To log out immediately without confirming, press Option-Shift-Command-Q.

shift-command-q
option–shift-command-q

* Does not apply to the Touch ID sensor.

Reference: Mac keyboard shortcuts

OSX Cmd: Reschedule Time Machine Backups

If you want to change the interval of Time Machine backups simply enter the following command into your Terminal:

sudo defaults write/System/Library/LaunchDaemons/com.apple.backupd-auto StartInterval -int 1800

900  = 15 minutes
1800 = 30 minutes
3600 = 1 hour

OSX Cmd: Getting Rid of "Open With" duplicates

You right-click icon in the Finder, choose "Open With", and a submenu pops up with an absurd number of duplicate entries.

The duplicate entries in the "Open With" submenu are caused by some corruption of the Launch Services database. The lsregister command, which is buried many layers under the /System/Library folder, will rebuild the database if you invoke it with the right options.

Here’s a on how to fix it (and you can add to your .bashrc):

# Quick way to rebuild the Launch Services database and get rid
# of duplicates in the Open With submenu.
alias fixopenwith='/System/Library/Frameworks/CoreServices.framework/Frameworks/LaunchServices.framework/Support/lsregister -kill -r -domain local -domain system -domain user'

Now you can get rid of the duplicates from the Terminal by running:

fixopenwith

You may need to follow that up with a:

killall Finder

OSX Cmd: Customize Mission Control To Show Only Windows From Current Desktop Space

To get Mission Control to only show you open windows from the current Desktop Space, type or paste the following into your Terminal:

defaults write com.apple.dock wvous-show-windows-in-other-spaces -bool FALSE

Then, restart the Dock process, which also controls the Mission Control process:

killall Dock

Now you’ll only see windows from the currently active Desktop Space when you activate Mission Control.



NOTE: Return it back:

defaults write com.apple.dock wvous-show-windows-in-other-spaces -bool TRUE

killall Dock

Want Colorful Command Line Shell For Your Mac OS X??

I always wanted to have colorful shell just like RedHat Enterprise Linux on my Mac OS X. It was not easy to configure it until a new command line shell from Ridiculous Fish (@ridiculous_fish) came in.

FISH - Friendly Interactive SHell  

The new fish is a POSIX command line shell with delightful, intuitive features like autosuggestions, 256 color syntax highlighting, web based configuration, and lots more. Best of all, these features just work, out of the box. No arcane syntax, no twiddling obscure knobs.

Steps On Installing & Configuring FISH:

1. Download fish here.
2. Just install fishfish.pkg
3. Open Terminal
4. Edit /etc/shells as root. Run: sudo vi /etc/shells
5. Add the line (if missing): /usr/local/bin/fish
6. To set FISH as as default shell for desire user, Login to desire user shell. Then run: chsh -s /usr/local/bin/fish

Some useful FISH command:

fish_config
Interactively set your color from the web. list FISH functions and variables. Also to see FISH command history.

fish_update_completions
Update man-page completions

OSX Key: Keyboard Shortcut Key For Delete Function

You can use one of the keyboard shortcut key below to perform 4 way of delete action:


delete
Delete one typed character at a time to the left.

fn + delete 
Delete one typed  character at a time to the right. Just like "Del" key on PC.

option + delete
Delete whole typed words at a time to the left

command + delete
Delete all typed charters to the left.


As far as I can tell this works all over Mac OS X and in most apps, including Safari, TextEdit, Terminal, Finder, iTunes, iChat, and more.

OSX Network: Network Error (tcp_error)

If website not loaded and the following error is displayed usually it's caused by DNS cache.

-------------------------------------------------------------------

Network Error (tcp_error)

A communication error occurred: "Operation timed out"

The Web Server may be down, too busy, or experiencing other problems preventing it from responding to requests. You may wish to try again at a later time.

For assistance, contact your network support team.

-------------------------------------------------------------------

DNS request are usually cache, that’s good as it speeds up the lookups within the same host but sometimes we will want to clear the cache so it don’t hold the values that are no longer valid.

In Leopard (Mac OSX 10.5) or Snow Leopard (10.6) to clear DNS cache , just type this in your Terminal and hit enter:

dscacheutil -flushcache


Note:
A DNS server matches the URL of a website (eg www.domain.com) with its numeric IP address - it translates www.domain.com into the unique numeric IP address (XX.XX.XX.XXX). Whenever you request a web page, your browser asks the name server to find the numeric translation of the URL.

Without the DNS servers, it would be a complicated web because we would have to know all the IP addresses rather than the nice friendly name, like Google.com.