Prevent Access To Certain Wi-Fi Network SSIDs Via Bash Script

In enterprise environments, there is often an open guest network and a secured enterprise network.  Often, you do not want users to connect to the guest network because it is throttled down and does not grant access to organizational network resources.  Below is a script that can be run as a Launch Daemon, which will turn the wireless off and display a dialog if a user connects to the wrong network. Continue reading “Prevent Access To Certain Wi-Fi Network SSIDs Via Bash Script”

Change The Serial Number On HP Printers Using Printer Job Language And netcat (or ftp)

Serial numbers sometimes default to XXXXXXXXXX after having a component replaced or the firmware being updated.  The Web interface does not offer a way to set the serial number, but this can be accomplished with some Terminal commands.

For the sake of this walkthrough, it is recommend to use vim to edit the file.  However, since it is difficult to learn (but not really), I will do a very detailed step-by-step so there are no issues.  If you are already familiar with vim, then you will probably cruise through this. Continue reading “Change The Serial Number On HP Printers Using Printer Job Language And netcat (or ftp)”

Customize The OS X Yosemite Login Screen

Give the OS X Yosemite login window a personalized look using your own image.  This is a simple trick to do.  Just save your desired image as:

/Library/Caches/com.apple.desktop.admin.png

Then, just log out to apply the change.  You should immediately see your new image.  If you don’t make sure you put it in the correct Library folder and that the permissions are correct. Continue reading “Customize The OS X Yosemite Login Screen”