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Hack and Tinker

February 11th, 2014 No comments

hackandtinkerHey guys and gals, I wanted to give you a heads up that most of my networking related posts have now shifted to my new website HackAndTinker.net. Hack and Tinker is completely focused on what I am terming Network Adventuring. What is Network Adventuring, you ask? Network Adventuring is a term coined by our team to describe one’s desire to learn as much as possible about the inner workings of computer networks. This can be anything from network security, to pen testing, network configuration, server setup and web development. PhilipStraatsma.com will remain for now, but at some point I may refocus it into something else or even just redirect it to Hack And Tinker. So, stop on over to the HAT website and check out what we have going on and let me know what you think.

Categories: Network Adventuring, Tech Tags:

How to recover from a incorrectly entered boot system command.

April 12th, 2012 No comments

This past week I learned a valuable lesson about upgrading the IOS to a newer version on a cisco switch. Always specify the location (flash: in my case) of the image before the image name when using the boot system imagename command.

For some reason I entered the command boot system c2950-i6q4l2-mz.121-6.EA2c.bin into the configuration for the switch I was upgrading to a new version of the IOS I had just copied over, forgetting the location of the image, in this case flash:. I then saved the configuration and rebooted the switch, which of course failed to come back up. When I consoled into the switch I was presented with the following error message upon reboot:

Loading “c2950-i6q4l2-mz.121-6.EA2c.bin”…c2950-i6q4l2-mz.121-6.EA2c.bin: permission denied

Error loading “c2950-i6q4l2-mz.121-6.EA2c.bin”

Interrupt within 5 seconds to abort boot process.

Boot process failed…

The system is unable to boot automatically.  The BOOT

environment variable needs to be set to a bootable

image.

switch:

 

To correct the problem you need to enter the boot flash:image-name.bin  (substituting image-name with the actual name of the IOS file you wish to boot to) while in rommon and the switch will reload into the IOS image you specify. If you are unsure of the name of the image you need to boot into simply issue a dir flash: command while in rommon, this will give you a list of all the files located in flash.

Once back into the IOS, login and enter exec mode command boot system flash:image-name.bin, again substituting image-name with the name of the IOS file in flash you want to use. Save the config and you are good to go.

Categories: Cisco, Tech, Tips Tags:

Always show the tab bar in Safari on the Mac.

June 15th, 2010 No comments

One thing I always liked about Firefox was the ability to always show the tab bar even if you had only one time open at a time. Sadly since version 3 of Safari that option is no longer in the preferences menu. However you can enable this option in the property list file for Safari.

Close Safari.

Download and install PlistEdit Pro 1.5 from Apple for free (Mac OS X 10.5.8 or later) http://www.apple.com/downloads/macosx/development_tools/plisteditpro.html

Open your Macintosh HD and browse to Library => Preferences and open com.apple.Safari.plist in PlistEdit Pro (should be the default action).

Expanded out Root by clinking on the triangle icon and click on the word Root to highlight it.

Hit the “New Child” button, enter AlwaysShowTabBar for the name, set the Class drop down to Boolean and the Value to Yes.

Select File in the menu bar and hit Save.

Open Safari and you will notice the tab bar is always open.

Categories: Tech Tags:

A night with the Source SDK

February 26th, 2009 6 comments

I have this crazy desire to know at least the basics about everything tech related and tonight was time to tackle game development. Having read up a little bit about the Source SDK (software developers kit) I figured it would be something I could jump into fairly quickly. The interface reminds me of and odd mix between 3ds Max (formerly 3D Studio Max) and Adobe Photoshop. Using the excellent Valve Developer Community Wiki I came up with a simple alleyway map featured below:

my_first_map_02
my_first_map_01

Categories: Personal, Tech Tags: