Step:1 Use fdisk command to identify your hard drive info # sudo fdisk -l Step:2 Scan your hard drive for Bad Sectors or Bad Blocks # sudo badblocks -v /dev/sdb > /tmp/bad-blocks.txt Just replace “/dev/sdb” with your own hard disk / partition. When we execute above command a text file “bad-blocks” will be created under
Finally you have to rebuild the image, to do this first compress the new image file with zip: zip -r update-unsigned.img * And then you have to sign that update-unsigned.img java -Xmx1024m -jar signapk.jar -w testkey.x509.pem \ testkey.pk8 update-unsigned.img update.img I extracted the signapk.jar, testkey.x509 and testkey.pk8 from the buildroot. Have fun with this!
The ulimate Linux kernal clean up command for Debian based systems. dpkg -l | grep ^ii | grep “linux-image-[0-9]” | awk -F’ ‘ ‘{ print $2 }’ | \grep -v `uname -r` | sed ‘$d’ | sed ‘$d’ | sed ‘s/linux-image//’ | \xargs -i echo “linux-image{} linux-headers{}” | xargs aptitude -y purge
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