I am new to Linux and just got some foggy idea of partition tables. To be precise here it is:

```
Model: ATA ST3500418AS (scsi)
Disk /dev/sda: 500GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number  Start   End     Size    Type      File system  Flags
 1      1049kB  1001MB  1000MB  primary   ext4         boot
 2      1001MB  3002MB  2001MB  primary
 3      3002MB  18.0GB  15.0GB  primary   ext4
 4      18.0GB  500GB   482GB   extended
 5      18.0GB  53.0GB  35.0GB  logical   ext4
 6      53.0GB  93.0GB  40.0GB  logical   ext4
 7      93.0GB  500GB   407GB   logical   ext4

$ uname -r -v
3.2.0-41-generic-pae #66-Ubuntu SMP Thu Apr 25 03:50:20 UTC 2013

$ df
Filesystem          1K-blocks      Used Available Use% Mounted on
/dev/sda3            14419440   4397832   9289144  33% /
udev                  1015728         4   1015724   1% /dev
tmpfs                  410376       908    409468   1% /run
none                     5120         0      5120   0% /run/lock
none                  1025940       584   1025356   1% /run/shm
/dev/sda1              961528    161488    751196  18% /boot
/dev/sda5            33643288   2435112  29499172   8% /var
/dev/sda6            38448788    180232  36315432   1% /usr/local
/dev/sda7           391315084 365544552   5892800  99% /home
/home/arun/.Private 391315084 365544552   5892800  99% /home/arun

```

And now I want to install OpenSUSE 12.2 alongside it. I also want to share `/usr/local` and `/home` partition among both OSes.

What changes to this partiton setup would get me going with the best usage of my hard disk space?
I will be doing kernel development later and thus want to share the `/boot` partition too.