[Nut-upsuser] Problem installing NUT on 16.04

[Jack McGee]

I rebooted machine and nut cannot connect to the UPS.

mythuser at amethi:/etc$ sudo /lib/nut/usbhid-ups -DD -a CyberUPS1
Network UPS Tools - Generic HID driver 0.42 (2.7.4.1)
USB communication driver (libusb 1.0) 0.02
    0.000000    debug level is '2'
    0.000499    upsdrv_initups...
    0.005722    Checking device (8087/8000)
    0.005753    Failed to open device, skipping. (Access denied 
(insufficient permissions))
    0.005764    Checking device (1D6B/0002)
    0.005775    Failed to open device, skipping. (Access denied 
(insufficient permissions))
    0.005781    Checking device (8087/8008)
    0.005790    Failed to open device, skipping. (Access denied 
(insufficient permissions))
    0.005798    Checking device (1D6B/0002)
    0.005807    Failed to open device, skipping. (Access denied 
(insufficient permissions))
    0.005811    Checking device (1D6B/0003)
    0.005821    Failed to open device, skipping. (Access denied 
(insufficient permissions))
    0.005827    Checking device (10C4/EA60)
    0.005834    Failed to open device, skipping. (Access denied 
(insufficient permissions))
    0.005841    Checking device (0764/0501)
    0.006592    - VendorID: 0764
    0.006603    - ProductID: 0501
    0.006606    - Manufacturer: CPS
    0.006608    - Product: CP1500PFCLCD
    0.006611    - Serial Number: 000000000000
    0.006614    - Bus: 003
    0.006616    - Device release number: 0001
    0.006620    Trying to match device
    0.006644    Device matches
    0.006648    Reading first configuration descriptor
    0.006655    auto detached kernel driver from USB device
    0.006663    failed to claim USB device: Resource busy
    0.006668    Kernel driver already detached
    0.006673    failed to claim USB device: Resource busy
    0.006677    Kernel driver already detached
    0.006683    failed to claim USB device: Resource busy
    0.006688    Kernel driver already detached
    0.006692    failed to claim USB device: Resource busy
    0.006697    Kernel driver already detached
    0.006702    Can't claim USB device [0764:0501]: Entity not found