piCore Resize Partition

For reference: http://www.tinycorelinux.net/12.x/aarch64/releases/RPi/README

• sudo fdisk -u /dev/mmcblk0

• Print the current partitions with 'p'

• Make note of the starting and ending sectors of the second partition

•    Device            StartCHS    EndCHS      StartLBA   EndLBA      Sectors   Size    Id   Type
     /dev/mmcblk0p2    1023,3,16   1023,3,16   172032     204799      32768     16.0M   83   Linux
     

• Delete the second partition with 'd'

• Create a new second partition with 'n' with same starting sector (StartLBA) and higher ending sector
  • You might want to reserve some space (e.g. 1 or 2 GB) for swap space on devices with low amount of memory.
    This is only needed if you expect to run out of memory e.g. during compiling a large program.
    Normally this is not needed.

• Below the old and new second partition below each other.

   Device           StartCHS    EndCHS       StartLBA   EndLBA       Sectors    Size    Id   Type
   /dev/mmcblk0p2   1023,3,16   1023,3,16    172032     204799       32768      16.0M   83   Linux
   /dev/mmcblk0p2   1023,3,16   1023,3,16    172032     249737215    249565184  119G    83   Linux
   

You can delete (d) and re-create (n) the partition at this point if needed.

• Write the new created second partition with 'w'

• Reboot to use the new partition table.
  • sudo reboot

• Enlarge the second partition to the new size with:
  • sudo resize2fs /dev/mmcblk0p2

• Verify the result with:
  1. df -hT
     To actual use the swap partition a few additional steps are needed. The results can be verified with:
  2. free