Robert, All that info is on the hamvoip site in howto's but I will repeat some highlights here. To copy an image to an SD card you insert the card into a reader/writer (usually a USB FOB) In Ubuntu it should mount the device. Do a 'df' at the Linux prompt to see how it is mounted. In my case on my Ubuntu laptop the main hard drive is /dev/sda1 and the SD card comes up a /dev/sdb In any case make absolutely sure you have the right device. dd is NOT forgiving and will just a happily write to your hard drive or another device. The assuming you are in the directory where the image resides you do the following: dd if=nameofimage.img of=/dev/sdb Of course you replace the filename and output device with your values. To make an image from the SD card you would do the following: dd if=/dev/sdb bs=1024 count=3900000 of=nameofimage.img Again use your values. Also be aware that the 1.2.1 code has a very nice backup system built-in Read the backup howto on the web page. Also BBB related questions should be asked on the arm-allstar list. You can join the list from a link on the hamvoip.org web page. 73 Doug WA3DSP http://www.crompton.com/hamradio
Date: Wed, 14 Jan 2015 21:48:44 -0500 From: N1XBM@amsat.org To: app_rpt-users@ohnosec.org Subject: [App_rpt-users] Need help DD command
I recently set-up a BBB. When getting the image from www.hamvoip.net I tried use my new installation of Ubuntu 14.04, mostly because I am trying to learn Linux by just using it. I didn’t have any luck and just to keep the project moving I resorted back to windows to complete the image copy.
I would like to learn how to copy a .img file to a micro sd card using DD. I would also like to know how to do the reverse of taking a micro sd card and making a .img file for backup.
Is there anyone on the list willing to help me with this?
Thank you
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