-
Make sure that you SD card is unplugged. Then run df. You should see
something like this:
user@host ~/ $ df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda1 119G 79G 34G 70% /
none 4.0K 0 4.0K 0% /sys/fs/cgroup
udev 7.8G 12K 7.8G 1% /dev
tmpfs 1.6G 1.1M 1.6G 1% /run
none 5.0M 0 5.0M 0% /run/lock
none 7.9G 1.5M 7.9G 1% /run/shm
none 100M 3.7M 97M 4% /run/user
-
Now insert you SD card and run df again. See the new entry (/dev/sdb1)?
That is your SD card. sdb is the actual device name and 1 is the
partition number. Your actual device may be named something different.
user@host ~/ $ df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda1 119G 79G 34G 70% /
none 4.0K 0 4.0K 0% /sys/fs/cgroup
udev 7.8G 12K 7.8G 1% /dev
tmpfs 1.6G 1.1M 1.6G 1% /run
none 5.0M 0 5.0M 0% /run/lock
none 7.9G 1.5M 7.9G 1% /run/shm
none 100M 3.7M 97M 4% /run/user
/dev/sdb1 2.0G 0.0G 2.0G 0% /media/user/LABEL
-
Unmount your SD card. If it has more than one partition, you will need to
do this for each partition.
user@host ~ $ sudo umount /dev/sdb1
-
This is the dangerous part. If you pick the wrong device, you could wipe
out your hard drive, so BE CAREFUL!. When specifying the device, don’t
include the partition number.
In this example we downloaded the compressed disk image file to
~/Downloads/ and our SD card is /dev/sdb. Adjust these values as
needed. This will take a long time.
user@host ~ $ xzcat ~/Downloads/ev3dev-yyyy-mm-dd.img.xz | sudo dd bs=4M of=/dev/sdb
[sudo] password for user:
TIP: You can monitor the progress of this by running the following in
another terminal. On some systems, the signal may need to be INFO
instead of USR1. This will cause the status to be printed periodically
in the first terminal.
user@host ~ $ sudo watch kill -USR1 $(pgrep ^dd)
-
When copying the image file has completed, run…
… to make sure any cached disk writes have completed. Once sync is finished,
it is safe to remove the SD card.
.