ubuntu@ubuntu:~$ sudo parted -I
parted: invalid option -- 'I'
Usage: parted [-hlmsv] [-a<align>] [DEVICE [COMMAND [PARAMETERS]]...]
ubuntu@ubuntu:~$ sudo parted -l
Model: ATA HGST HTS545050A7 (scsi)
Disk /dev/sda: 500GB
Sector size (logical/physical): 512B/4096B
Partition Table: gpt

Number  Start   End    Size    File system     Name  Flags
 1      1049kB  538MB  537MB   fat32                 boot
 2      538MB   496GB  496GB   ext4
 3      496GB   500GB  3695MB  linux-swap(v1)


Warning: Unable to open /dev/sr0 read-write (Read-only file system).  /dev/sr0
has been opened read-only.
Error: Can't have a partition outside the disk!                           

ubuntu@ubuntu:~$