???????????????
???????????￡?df???????????????????????“-T”??????????????????????С?
????$ df -T
????Filesystem              Type     1K-blocks      Used Available Use% Mounted on
????/dev/mapper/ubuntu-root ext4     952893348 591583292 312882844  66% /
????none                    tmpfs            4         0         4   0% /sys/fs/cgroup
????udev                    devtmpfs   4002492         4   4002488   1% /dev
????tmpfs                   tmpfs       803536      1196    802340   1% /run
????none                    tmpfs         5120         0      5120   0% /run/lock
????none                    tmpfs      4017668     60176   3957492   2% /run/shm
????none                    tmpfs       102400        48    102352   1% /run/user
????/dev/sda1               ext2        233191    100025    120725  46% /boot
???????????????????????????
??????????????????????????????????“-t ”???????????????????????????????????????
????$ df -t ext2 -t ext4
????Filesystem              1K-blocks      Used Available Use% Mounted on
????/dev/mapper/ubuntu-root 952893348 591583380 312882756  66% /
????/dev/sda1                  233191    100025    120725  46% /boot
????????????????????????“-x ”?????????????????????????????????????????
????$ df -x tmpf
????????????????????????????
???????????df????????????????????????????????????????????????????????????????????????????????????????????df??????????????????????????????????????????
????$ df /
????Filesystem              1K-blocks      Used Available Use% Mounted on
????/dev/mapper/ubuntu-root 952893348 591583528 312882608  66% /
????$ df /home/dev
????Filesystem              1K-blocks      Used Available Use% Mounted on
????/dev/mapper/ubuntu-root 952893348 591583528 312882608  66% /
?????????????????????
??????????????????????????????????????????????????????????????“-a”????????????????????????????????豸?????????????磬tmpfs??cgroup???????????FUSE???????????Щ???????????С?0??????“-a”????????????????
????$ df -a
????Filesystem              1K-blocks      Used Available Use% Mounted on
????/dev/mapper/ubuntu-root 952893348 591578716 312887420  66% /
????proc                            0         0         0    - /proc
????sysfs                           0         0         0    - /sys
????none                            4         0         4   0% /sys/fs/cgroup
????none                            0         0         0    - /sys/fs/fuse/connections
????none                            0         0         0    - /sys/kernel/debug
????none                            0         0         0    - /sys/kernel/security
????udev                      4002492         4   4002488   1% /dev
????devpts                          0         0         0    - /dev/pts
????tmpfs                      803536      1196    802340   1% /run
????none                         5120         0      5120   0% /run/lock
????none                      4017668     58144   3959524   2% /run/shm
????none                       102400        48    102352   1% /run/user
????none                            0         0         0    - /sys/fs/pstore
????cgroup                          0         0         0    - /sys/fs/cgroup/cpuset
????cgroup                          0         0         0    - /sys/fs/cgroup/hugetlb
????/dev/sda1                  233191    100025    120725  46% /boot
????vmware-vmblock                  0         0         0    - /run/vmblock-fuse