ubuntu@ubuntu:~/Downloads$ sudo lsblk
NAME   MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sda      8:0    0 465.8G  0 disk 
├─sda1   8:1    0   100M  0 part 
├─sda2   8:2    0 194.6G  0 part 
├─sda3   8:3    0     1K  0 part 
├─sda5   8:5    0 255.1G  0 part 
└─sda6   8:6    0  15.9G  0 part [SWAP]
sdb      8:16   1     2G  0 disk 
└─sdb1   8:17   1     2G  0 part /cdrom
loop0    7:0    0 962.1M  1 loop /rofs
ubuntu@ubuntu:~/Downloads$ sudo fixparts /dev/sda
FixParts 0.8.8

Loading MBR data from /dev/sda

Warning: 0xEE partition doesn't start on sector 1. This can cause problems
in some OSes.

MBR command (? for help): ?
a	toggle the active/boot flag
c	recompute all CHS values
l	set partition as logical
o	omit partition
p	print the MBR partition table
q	quit without saving changes
r	set partition as primary
s	sort MBR partitions
t	change partition type code
w	write the MBR partition table to disk and exit

MBR command (? for help): p

** NOTE: Partition numbers do NOT indicate final primary/logical status,
** unlike in most MBR partitioning tools!

** Extended partitions are not displayed, but will be generated as required.

Disk size is 976773168 sectors (465.8 GiB)
MBR disk identifier: 0xAC3BE64A
MBR partitions:

                                                   Can Be   Can Be
Number  Boot  Start Sector   End Sector   Status   Logical  Primary   Code
   1      *           2048       206847   primary              Y      0x07
   2                206848    408370837   primary              Y      0x07
   5             408371200    943415295   logical     Y        Y      0x83
   6             943417344    976771071   logical     Y        Y      0x82

MBR command (? for help):