Batch Convert Images

 The quickest way of converting image formats is to use ImageMagick. There are binary releases for most operating systems, however in my case I'm using it on OS X. So to install using brew from a terminal use:

brew install imagemagick

Once that is installed then just move to the folder you are interested in and use the following:

mogrify -format png *.jpg

Once that is completed the folder of jpegs should now have some png friends to play with.

Active Directory Forest Wide User Search

 I always have to look this up, I'm not sure what is going on with my memory:

dsquery user forestroot -name search

When you are working on large Active Directories this is somewhat handy. Just replace search with the name you are after, helpfully it supports wildcard.

Finding the Exchange Mail Pickup and Replay Directory Folder Location in Your Exchange Infrastructure

 Use the following powershell command to return the mail pickup folder location from all your Edge and Hub Transport servers.

Get-TransportServer | Fl name, *PickupDirectoryPath*

If you are interested in a single server add -Identity:

Get-TransportServer -Identity "Server Name" | Fl name, *PickupDirectoryPath*

Where "Server Name" is the Exchange box you are interested in.

Unable to use Wireless and Wired Connections In Windows 8

  I needed to do this recently and had a few issues. I guess it is not often required to have multiple connections but every now and then it crops up. Historically drivers sometimes caused issues and usually down to power options, understandability to reduce load on batteries. However this time it turned out to be windows that is effecting things. Cutting a long story short, to find the culprit setting run:

Quick Method to List Disks in Windows

 There are numerous ways to do this. However this:

wmic diskdrive list brief 

is quick and easy to remember. Sample output:

C:\windows\system32>wmic diskdrive list brief
Caption              DeviceID            Model                Partitions  Size
LITEONIT LMT-128M3M  \\.\PHYSICALDRIVE0  LITEONIT LMT-128M3M  2           128034708480

Even though it is easy to remember, I'm putting it here as I'll forget.

USB Network Interface Missing from Wireshark Interface List

 I needed to do some packet capturing in windows, so I added a USB network interface to an ultra-book. Upon running wireshark the USB network adapter was conspicuous by its absence from the interface list. After a bit of mulling over I wondered if WinPCap was not aware of the adapter; as these days WinPCap runs as a service. The service is called NPF (NetGroup Packet Filter). So:

 net stop npf


 net Start npf

Low and behold, after starting wireshark a full list of network adapters was presented. Game on, bring me the packets.

Finding out the Windows Cluster Size of a Volume

 From an administrative command prompt type:

fsutil fsinfo ntfsinfo d:

The output will look like:

Excluding or Including a Network/Subnet from Wireshark Results

You can use this wireshark filter to restrict results to the network you are interested in:

ip.addr ==

Since we are not specifying a source or destination (i.e. ip.src or ip.dst), the filter will match both. If you want to reverse it then:

!(ip.addr ==

I'll often use the same method to filter the results on a specific IP address, preserving both ends of the conversation:

ip.addr ==

Nslookup on The Mac, Interactive Mode Broken

 Nslookup under osx is tricky to use interactively as it doesn't support readline. When you try to use the command history you get the following:

Administer Microsoft Exchange Remotely with Powershell

 Rather than installing the remote exchange management tools and the pain that causes, you can use powershell remoting. To setup powershell to connect to the exchange server pop the following into a powershell prompt on your client machine: