udisksctl power-off -b /dev/sdc1 apt install udisks2 hdparm把磁盘转到待机模式 cd /sys/bus/usb/devices good_usb=$(grep -H Western usb?/?-?/manufacturer | cut -d"/" -f1,2) cd ${good_usb}/power gksudo "sh -c 'echo "suspend" > level'" free space https://linuxhint.com/free_up_hard_drive_space_ubuntu/