TLDR
Enter a command. For example: kde inhibit, dpkg query, xclock.

hdparm

 
Get and set SATA and IDE hard drive parameters. More information: https://manned.org/hdparm.
 
  • Request the identification info of a given device:
     
    sudo hdparm -I /dev/{{device}}
     
  • Get the Advanced Power Management level:
     
    sudo hdparm -B /dev/{{device}}
     
  • Set the Advanced Power Management value (values 1-127 permit spin-down, and values 128-254 do not):
     
    sudo hdparm -B {{1}} /dev/{{device}}
     
  • Display the device's current power mode status:
     
    sudo hdparm -C /dev/{{device}}
     
  • Force a drive to immediately enter standby mode (usually causes a drive to spin down):
     
    sudo hdparm -y /dev/{{device}}
     
  • Put the drive into idle (low-power) mode, also setting its standby timeout:
     
    sudo hdparm -S {{standby_timeout}} {{device}}

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