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Mac OS X

I have created/launched Amazon Machine Image (AMI) instance powered by a CentOS/RHEL/Red Hat Enterprise Linux. How can I connect to my instance using OpenSSH Linux/Unix/OSX ssh client?
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How do I disable post revisions feature found in wordpress version 2.6.x and v3.x.x based blog site?
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Firefox Disable / Hide New Tab Page

I've upgraded to Firefox v13. However, I don't like the new tab page. I'm concerned about my privacy. How do disable or hide new tab page while using Firefox browser version 13? How do you get rid of the "new tab" page that shows recently visited pages?
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I'm using a Mac OS X and combination of ssh-agent+ssh-add to adds RSA or DSA identities to the authentication agent. ssh-agent provides me a secure way of storing the private key. However, I'd like to expire identities added to the agent within half an hour. How do I set lifetime of identities added to the agent under Unix / Linux / BSD / Apple OS X operating systems?
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I'm using an external display with a MacBook Pro. I do not want to use the external monitor as a mirrored display. I need to move the dock and the menu bar to external monitor. How do I setup the external monitor as main display?
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Apple OS X Lock Desktop / Screen

I need to prevent others using my desktop or laptop while I'm away from it. How do I lock my Laptop (Macbook or Macbook pro) / desktop using Mac OS X operating systems without using 3rd party applications?
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What the differences between a Linux or UNIX software update and an upgrade? How do I perform the both?
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Restart Apache 2 In Mac OS X

How do I restart the Apache 2 Web Server under Apple OS X UNIX operating systems using bash command prompt?
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Mac Os X: Mount NFS Share / Set an NFS Client

How do I access my enterprise NAS server by mounting NFS filesystem onto my Mac OS X based system using GUI and command line based tools?
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Apple OS X: Open .Rar File / Extract rar

I know how to open .rar file under Linux, but how do you open .rar file under Apple OS X UNIX using command line and GUI tools options?
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