iMessage “Waiting for Activation” Error on iPhone

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There are many tutorials over the web regarding this problem but unfortunately it is not always the same for everybody.

In my case I have tried all the links below unsuccessfully (for you it might work):

https://support.apple.com/en-us/HT201349
http://www.idownloadblog.com/2014/05/14/how-to-remove-a-phone-number-from-imessage/
http://www.igeeksblog.com/fix-imessage-waiting-for-activation/

also you can try more:
https://duckduckgo.com/?q=imessage+waiting+for+activation&t=osx

Citrix Xen: Command Line Tips & Tricks

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How to get the Citrix XenServer version:

[root@XenGz ~]# cat /etc/redhat-release
XenServer release 6.5.0-90233c (xenenterprise)
[root@XenGz ~]# xe-linux-distribution 
os_distro="xenserver"
os_majorver="6"
os_minorver="5"
os_uname="3.10.0+2"
os_name="XenServer release 6.5.0-90233c (xenenterprise)"

How to list the vhd partitions and get the corresponding snapshosts (if any):

Citrix Xen: How to "migrate" VHD lv from one XEN to another without export/import but with dd command

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Citrix Xen has a way to migrate the machines from one host to another via xe vm-export and xe vm-import commands but there are situations when this won't work.
For example, if the source disk is in bad shape and there are bad (unreadable) blocks on your vm's disks, the xe vm-export command will be unsuccessful with the following error:

Citrix Xen: How to show vm information via command line

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I was forced the other day to shutdown a machine via command line and my surprise was to get an error during the execution: VM didn't acknowledge the need to shutdown.
The error is quite convincing and full of useful stuff (NOT) but it's there and you cannot get past it without some extra parameters.
Read on for the solution.

Citrix Xen: How to create VM and install Operating System via command line without XenCenter

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In this article, I will show you how to install (any) operating system via command line in Citrix Xen. And without too much comment, read on!

Create a VM from the Debian Lenny template. Output should be the VM's UUID:

xe vm-install template="Debian Wheezy 7.0 (64-bit)" new-name-label=debian

OSX: rEFIt is working with SIP enabled!

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I don't remember exactly when I have installed rEFIt (I did it only once) but I know I am using it without any problems since around 2006 and it went trough 2 laptops and several OSX versions already. The beauty of OSX upgrades and Time Machine.

After installing El Capitan, I was still using it without problems (well, just a small one but no biggie - will be mentioned a bit later), but also with SIP enabled! Will explain about SIP too.

OSX: Launchd Tips, Tricks and examples

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Launchd is designed to start System and Users daemon/agents located in the following places:

~/Library/LaunchAgents - Per-user agents provided by the user
/Library/LaunchAgents - Per-user agents provided by the administrator
/Library/LaunchDaemons - System-wide daemons provided by the administrator
/System/Library/LaunchAgents - Per-user agents provided by Mac OS X
/System/Library/LaunchDaemons - System wide daemons provided by MAC OS X

OSX: Command line tool for temperatures and fan sensors

Submitted by root on

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You have a bunch of applications designed to show you temperatures and fan speeds in graphical environment. Some are free but most of them are paid.
But what happens if you need something in command line? Well, it is even better because you can find many free powerful tools.
One of them is iStats. Below you will learn how to install and use it.

OS X: Add rc.local and Launchd entry for it

Submitted by root on

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Prior to OS X 10.10 Yosemite, you were able to start rc.local script via rc..
That is gone and you have to use launchd.

This tutorial assumes you have already your rc.local script in (example) /etc/rc.local and it is executable and properly populated with your desired commands.
So, without writing too much, below is my example of launchd script:

OS X: Disable Automount for a Specific Partition

Submitted by root on

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In order to do this, you have to fire up a bit of terminal. If you are not familiar with the underlines of UNIX, you should document yourself more before proceeding.

So, I have a partition which I do not want to be automatically mounted on reboot because it is used by one virtualbox machine.
1. List the partitions with diskutil command:
mini:~ osx$ diskutil list

SMF Tips and Tricks

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I got this SMF forum for my wife and is working very well. I am very satisfied with SMF.
However, sometimes you get into trouble with it and the worst part is you do not have much logs to work with. Also, apache logs won't help much either.

So, below you will find things I encountered.

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