How to enlarge the extended partition without data loss? Note that I have a LVM logical partition inside of this extended partition.
# fdisk -l
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 499711 248832 83 Linux
/dev/sda2 501758 41940991 20719617 5 Extended
/dev/sda5 501760 41940991 20719616 8e Linux LVM
Disk /dev/mapper/a--vm--vg-swap_1 doesn't contain a valid partition table
Command (m for help): v
Remaining 41949182 unallocated 512-byte sectors
Command (m for help): p
Disk /dev/sda: 42.9 GB, 42949672960 bytes
255 heads, 63 sectors/track, 5221 cylinders, total 83886080 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00094bdb
