我有一台戴尔 inspiron 5423 笔记本电脑，配备 500GB 硬盘和 6GB 内存。
我使用的是 ubuntu 15.10。它运行非常慢。然后我决定重新安装 ubuntu 16.04。我的 ubuntu 运行很快，但总是显示“您的存储空间不足，您还剩下 900 MB”。
我截取了屏幕截图，看看我的 ubuntu 是否安装正确。如果有问题，我该如何修复。我在执行时多次看到 linux fdisk -l。当我这样做时df / -h，我得到了以下信息
/dev/sdb1 24G 18G 4.6G 80% /
我已将磁盘配置的屏幕截图附在下面（抱歉信息太长）
*-disk
description: ATA Disk
product: Hitachi HTS54505
vendor: Hitachi
physical id: 0.0.0
bus info: scsi@0:0.0.0
logical name: /dev/sda
version: A7A0
size: 465GiB (500GB)
capabilities: partitioned partitioned:dos
configuration: ansiversion=5 logicalsectorsize=512 sectorsize=4096 signature=bea99cd7
*-volume:0
description: EXT4 volume
vendor: Linux
physical id: 1
bus info: scsi@0:0.0.0,1
logical name: /dev/sda1
version: 1.0
serial: 587b0ba7-5820-4ae1-9e31-6a0d8667504e
size: 93GiB
capacity: 93GiB
capabilities: primary bootable journaled extended_attributes large_files huge_files dir_nlink recover extents ext4 ext2 initialized
configuration: created=2015-01-01 21:46:52 filesystem=ext4 lastmountpoint=/media/tushant/587b0ba7-5820-4ae1-9e31-6a0d8667504e modified=2017-02-17 12:40:39 mounted=2017-02-17 12:40:39 state=clean
*-volume:1
description: Extended partition
physical id: 2
bus info: scsi@0:0.0.0,2
logical name: /dev/sda2
size: 372GiB
capacity: 372GiB
capabilities: primary extended partitioned partitioned:extended
*-logicalvolume:0
description: Linux swap / Solaris partition
physical id: 5
logical name: /dev/sda5
capacity: 977MiB
capabilities: nofs
*-logicalvolume:1
description: Linux filesystem partition
physical id: 6
logical name: /dev/sda6
capacity: 93GiB
*-logicalvolume:2
description: HPFS/NTFS partition
physical id: 7
logical name: /dev/sda7
capacity: 146GiB
*-logicalvolume:3
description: HPFS/NTFS partition
physical id: 8
logical name: /dev/sda8
logical name: /media/tushant/Important
capacity: 132GiB
configuration: mount.fstype=fuseblk mount.options=rw,nosuid,nodev,relatime,user_id=0,group_id=0,default_permissions,allow_other,blksize=4096 state=mounted
*-scsi:1
physical id: 2
logical name: scsi1
capabilities: emulated
*-disk
description: ATA Disk
product: SAMSUNG SSD PM83
physical id: 0.0.0
bus info: scsi@1:0.0.0
logical name: /dev/sdb
version: 2D1Q
serial: S0XLNSAC532389
size: 29GiB (32GB)
capabilities: partitioned partitioned:dos
configuration: ansiversion=5 logicalsectorsize=512 sectorsize=512 signature=a6921274
*-volume:0
description: EXT4 volume
vendor: Linux
physical id: 1
bus info: scsi@1:0.0.0,1
logical name: /dev/sdb1
logical name: /
version: 1.0
serial: 04f20ec1-3497-43e8-ac80-2616b302dabd
size: 24GiB
capacity: 24GiB
capabilities: primary bootable journaled extended_attributes large_files huge_files dir_nlink recover extents ext4 ext2 initialized
configuration: created=2016-08-31 17:22:39 filesystem=ext4 lastmountpoint=/ modified=2017-05-29 07:45:19 mount.fstype=ext4 mount.options=rw,relatime,errors=remount-ro,data=ordered mounted=2017-05-29 07:45:20 state=mounted
*-volume:1
description: Extended partition
physical id: 2
bus info: scsi@1:0.0.0,2
logical name: /dev/sdb2
size: 5736MiB
capacity: 5736MiB
capabilities: primary extended partitioned partitioned:extended
*-logicalvolume
description: Linux swap / Solaris partition
physical id: 5
logical name: /dev/sdb5
capacity: 5736MiB
capabilities: nofs
更新
Model: ATA Hitachi HTS54505 (scsi)
Disk /dev/sda: 500GB
Sector size (logical/physical): 512B/4096B
Partition Table: msdos
Disk Flags:
Number Start End Size Type File system Flags
1 1049kB 100GB 100GB primary ext4 boot
2 100GB 500GB 400GB extended
5 100GB 101GB 1024MB logical linux-swap(v1)
6 101GB 201GB 100GB logical ext4
7 201GB 358GB 157GB logical ntfs
8 358GB 500GB 142GB logical ntfs
Model: ATA SAMSUNG SSD PM83 (scsi)
Disk /dev/sdb: 32.0GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:
Number Start End Size Type File system Flags
1 1049kB 26.0GB 26.0GB primary ext4 boot
2 26.0GB 32.0GB 6015MB extended
5 26.0GB 32.0GB 6015MB logical linux-swap(v1)