Disk /dev/sda: 149,1 GiB, 160041885696 bytes, 312581808 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
Disklabel type: dos
Disk identifier: 0x77cf9468

Device     Boot     Start       End   Sectors   Size Id Type
/dev/sda1  *         2048 308408319 308406272 147,1G 83 Linux
/dev/sda2       308410366 312580095   4169730     2G  5 Extended
/dev/sda5       308410368 312580095   4169728     2G 82 Linux swap / Solaris

Disk /dev/sdb: 7,4 GiB, 7973371904 bytes, 15572992 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
Disklabel type: dos
Disk identifier: 0x0e77ecee


maurizio@maury:~$  sudo fdisk 

Usage:
 fdisk [options] <disk>      change partition table
 fdisk [options] -l [<disk>] list partition table(s)

Options:
 -b, --sector-size <size>      physical and logical sector size
 -c, --compatibility[=<mode>]  mode is 'dos' or 'nondos' (default)
 -L, --color[=<when>]          colorize output (auto, always or never)
 -l, --list                    display partitions end exit
 -t, --type <type>             recognize specified partition table type only
 -u, --units[=<unit>]          display units: 'cylinders' or 'sectors' (default)
 -s, --getsz                   display device size in 512-byte sectors [DEPRECATED]

 -C, --cylinders <number>      specify the number of cylinders
 -H, --heads <number>          specify the number of heads
 -S, --sectors <number>        specify the number of sectors per track

 -h, --help     display this help and exit
 -V, --version  output version information and exit

For more details see fdisk(8).
maurizio@maury:~$