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Feb
04

Using diskutil to partition a disk

I’m not a fan of the new Disk Utility in El Capitan.  I had a drive with 3 partitions and I needed to make it a single partition drive. Disk Utility would not allow me to delete one of the partitions no matter what I tried.

So I used the following Terminal command:



diskutil partitionDisk /dev/disk2 GPT JHFS+ New 0b



To break it down:

1.  diskutil - is a command line tool used for formatting disks.

2.  patitionDisk -  is an option that can be used in diskutil.

3.  /dev/disk2 -  is the location of the disk that you want to format.  You can use the diskutil “list” option  to find this information.

4.  GPT -  is the GUID Partition Table.

5.  JHFS+ - is the default filesystem type that OS X uses.

6.  New - This is the name of the partition.  You can name it whatever you like.

7.  0b - This tells the command to use all available free disk space.

Feb
02

Enable the Managed Client Debug Log for OS X

Enable the Managed Client Debug Log for OS X

Launch Terminal.app

Type the following commands:

sudo defaults write /Library/Preferences/com.apple.MCXDebug debugOutput -2

sudo defaults write /Library/Preferences/com.apple.MCXDebug collateLogs 1

sudo touch /var/db/MDM_EnableDebug

* Log is written to: /Library/Logs/ManagedClient/ManagedClient.log

Feb
02

Re-enroll a Mac into the Device Enrollment Program (DEP) without erasing.

Re-enroll a Mac into the Device Enrollment Program (DEP) without erasing

Launch Terminal.app


Type the following commands:

sudo rm /var/db/.AppleSetupDone

sudo rm -rf /var/db/ConfigurationProfiles/

sudo rm /Library/Keychains/apsd.keychain


Restart the Mac and re-enroll via DEP

Nov
05

OS X Server: Caching Service Registration

The Caching Service updates it's registration with Apple every 55 minutes, as registrations expire on Apple's side after 1 hour. This mechanism not only allows for a crashed Caching server to be removed from registry but also to track changes in the public IP.

Changing the Only cache content for local networks setting causes an immediately re-registration, removing the local network range from the registration payload when the setting is turned off.

On Stop
When the Caching Server stops it deregisters with lcdn-registration.apple.com allowing clients to download updates from Apple servers again.

Nov
05

OS X Server: Performance Mode

The –perfmode option indicates whether or not the performance mode has been enabled, dedicating resources to binaries within the Server app:

serverinfo --perfmode

If the performance mode has not been enabled then the output will be as such:

Server performance mode is NOT enabled.
To enable performance mode, you can also use serverinfo. This is the only task that the command does that can make any changes to the system and as such is the only time you need to elevate privileges:

sudo serverinfo —setperfmode 1

Or set the boolean value back to 0 to disable.

sudo serverinfo —setperfmode 0

Nov
05

serverdiagnose Command to Troubleshoot OS X Server

Command to Troubleshoot OS X Server

Location of executable: /Applications/Server.app/Contents/ServerRoot/usr/sbin

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