IP/MAC Scanner from Linux Command Line?

I use IP Scanners all the time.  Angry IP and IP Scanner Pro are great GUI applications for Windows, OS X, and Linux.  But what if you’re only option is a linux command line?  NMAP is here to the rescue!

If you want to scan an IP range for MAC and IP Addresses that are up, here is the command:

NMAP Example:


Enable FTP Server in Mac OS X El Capitan

There’s no need to download an FTP server with OS X El Capitan.  Apple has embedded an FTP server than you can turn on easily!




P.S.  FTP is insecure, but sometimes you can’t avoid it!

iPhone WiFi Calling not working

WiFi calling on the iPhone is awesome when it works…. But sometimes it doesn’t work.  Here are some steps to try to resolve WiFi Calling not working.


  • WiFi calling calls fail
  • Battery Drain
  • Incoming calls aren’t ringing
  • Incoming callers can’t hear you
  • iPhone gets warm when on WiFi
  • iPhone switches between WiFi carrier and regular carrier (T-Mobile to T-Mobile WiFi)


Try these fixes in order one by one

  1. Update your WiFi Emergency Address (even if you update it to the same address, just update it)
  2. Reset Network Settings
  3. Reboot
  4. Check SIM card for 3GG or “60.00”
  5. Check WiFi router firewall settings for ports 500 and 4500
  6. Force the WiFi router to “G” Mode
  7. Replace WiFi Router


iPhone or iPad sync session failed to start

The backup and sync feature with Apple’s iTunes is slowly being replaced by iCloud’s features. But if you’re cheap like me and have over 120GB on your 128GB iPhone, you don’t want to resync with the cloud in the event of a failure. I have so much freaking data, I need a local back up. So I sync with iTunes…..

Just recently I ran into an issue when trying to sync my phone:

“The iPhone ‘XYZ’s iPhone’ could not be synced because the sync session failed to start.”

There’s an easy fix for that…. 


  1. Go to Preferences
  2. Go to Devices
  3. Delete the Device Backup for the iPhone/iPad/iPod giving you problems
  4. Restart iTunes



Delete a route in Mac OS X Yosemite

I realized I had a post for how to add a static route, but didn’t have one for how to delete one…. So here ya go!