Open up the terminal on the mac and use the following: hdiutil makehybrid -o image_name.iso folder_name Where folder_name is the folder you want to convert to an ISO.

When you reboot and get this error after installing Wireshark on the mac: Insecure startup item disabled chmodBPF I always forget where the file is that needs the permissions change. So for my failing memory: cd /Library/StartupItems sudo chown -R root:wheel ChmodBPF

It is sometimes useful to see exif information in image files. If you want to examine exif information for an image then exiftool by Phil Harvey is excellent at doing this from the commandline. If you want to quickly examine exif from the internet then I have put together a small shell script which you can pass a url i.e. get_exif_info http://path/to/image.jpg That will pass the file direct to exiftool without saving it.

Use: sw_vers In my case: ProductName: Mac OS X ProductVersion: 10.6.4 BuildVersion: 10F569 Update: This still works in os x yosemite: ProductName: Mac OS X ProductVersion: 10.10.2 BuildVersion: 14C1514

I put together a script from a variety of sources including some customisations which displays the following information in the form: External : x.x.x.x Ethernet : INACTIVE SSL : x.x.x.x AirPort : x.x.x.x SSID: name Channel: 4 The External entry uses http://checkip.dyndns.org/ to get the current external IP address. Ethernet give you your local wired ipv4 address. SSL displays the current Juniper Network Connect assigned IP address. Airport shows the currently connected wireless network (SSID) and the associated channel.

From a terminal: sudo route -n add 172.168.17.0/24 192.168.1.27 Where 172.168.17.0/24 is the network and 192.168.1.27 is the gateway

The simplest way to do this is: dpkg-reconfigure tzdata Then follow the onscreen prompts

If you have curl installed: echo External IP: curl -s http://checkip.dyndns.org/ | awk '{print $6}' | cut -f 1 -d < This comes in real handy if you move sites and have more than one route out. It also works rather well from OSX Geektool.

Windows default behaviour is to write to the disk signature of basic disks when they are attached/detected by windows. This can cause merry hell with iscsi volumes, especially those with existing setups. Start diskpart interactively and put in the following: automount disable Then: automount scrub The first setting disables automounting and the second resets any past configs for disks that have been previously attached.

Try: wmic /node:machine_name product get name,version,vendor Where machine_name is the computer you are interested in. You will need the correct permissions to get to the remote machine. This example just returns installed software.