or more detailed usage, use cgpt COMMAND -h

localhost / # cgpt show /dev/sda
       start        size    part  contents
           0           1          PMBR
           1           1          Pri GPT header
           2          32          Pri GPT table
        8192       32768       1  Label: "U-Boot"
                                  Type: ChromeOS kernel
                                  UUID: 8A3780D2-ED58-EF4F-A556-8B63A4D9039B
                                  Attr: priority=10 tries=5 successful=1
       40960       32768       2  Label: "Kernel"
                                  Type: Linux data
                                  UUID: 55FC4EAA-BBD0-3048-8BD3-52224B03B541
      106496    62424095       3  Label: "Root"
                                  Type: Linux data
                                  UUID: EBA1056D-E33A-F346-A005-E2909D43EA2B
       73728       32768      12  Label: "Script"
                                  Type: Linux data
                                  UUID: 1EFA854C-73CD-5C4E-B01B-8CA08548E6F0
    62530591          32          Sec GPT table
    62530623           1          Sec GPT header
localhost / #