Merge remote-tracking branch 'gokturk/install-expert-dd-update'

wiki/src/install/expert/usb.mdwn

@@ -173,11 +173,11 @@ Install Tails using <span class="command">dd</span>
 
    - <span class="command-placeholder">device</span> with the device name found in step 5
 
-   <p class="pre command">dd if=<span class="command-placeholder">tails.img</span> of=<span class="command-placeholder">device</span> bs=16M && sync</p>
+   <p class="pre command">dd if=<span class="command-placeholder">tails.img</span> of=<span class="command-placeholder">device</span> bs=16M oflag=direct status=progress</p>
 
    You should get something like this:
 
-   <p class="pre command-example">dd if=/home/user/tails-amd64-3.12.img of=/dev/sdb bs=16M && sync</p>
+   <p class="pre command-example">dd if=/home/user/tails-amd64-3.12.img of=/dev/sdb bs=16M oflag=direct status=progress</p>
 
    If no error message is returned, Tails is being copied on the USB
    stick. The copy takes some time, generally a few minutes.