一、提问

Linux系统中如何查看已使用资源的文件系统

二、解决方法

可以通过如下几种命令查看，有些情形下对应输出可能看不到结果，可以尝试另外几个命令。

方法一：

[root@centos block]# df -Th /xfs
Filesystem     Type  Size  Used Avail Use% Mounted on
/dev/sdb xfs 2.0G   33M  2.0G   2% /xfs

方法二：

[root@centos block]# mount
/dev/mapper/vg_centos-lv_root on / type ext4 (rw)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
tmpfs on /dev/shm type tmpfs (rw)
/dev/sda1 on /boot type ext4 (rw)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
/dev/sdb on /xfs type xfs (rw)

方法三：

[root@centos block]# lsblk -f /dev/sdb 
NAME FSTYPE LABEL UUID                                 MOUNTPOINT
sdb  xfs          3f51c50b-b741-4a38-bedc-f76b9bc3108d /xfs

方法四：

[root@centos block]# lsblk -mf
NAME                          SIZE OWNER GROUP MODE       NAME                         FSTYPE      LABEL UUID                                   MOUNTPOINT
sdb                             2G root  disk  brw-rw---- sdb                          ext4              99db2ba8-678d-4f7c-bb46-66721c9f5a49   
sda                            10G root  disk  brw-rw---- sda                                                                                   
├─sda1                        500M root  disk  brw-rw---- ├─sda1                       ext4              143da948-330f-4ace-acdf-ac22411df758   /boot
└─sda2                        9.5G root  disk  brw-rw---- └─sda2                       LVM2_member       e9lKgl-Ta1c-KwUK-v7sz-m3Hx-nfT3-35eQ5g 
  ├─vg_centos-lv_root (dm-0)  8.5G root  disk  brw-rw----   ├─vg_centos-lv_root (dm-0) ext4              8a6c4031-ad5e-4ae7-924e-fe7551b89800   /
  └─vg_centos-lv_swap (dm-1)    1G root  disk  brw-rw----   └─vg_centos-lv_swap (dm-1) swap              616df837-a5da-4165-8213-e439787bb648   [SWAP]
sr0                          1024M root  cdrom brw-rw---- sr0                                                                                   

方法五：

[root@centos block]# blkid 
/dev/sdb: UUID="3f51c50b-b741-4a38-bedc-f76b9bc3108d" TYPE="xfs" 
/dev/sda1: UUID="143da948-330f-4ace-acdf-ac22411df758" TYPE="ext4" 
/dev/sda2: UUID="e9lKgl-Ta1c-KwUK-v7sz-m3Hx-nfT3-35eQ5g" TYPE="LVM2_member" 
/dev/mapper/vg_centos-lv_root: UUID="8a6c4031-ad5e-4ae7-924e-fe7551b89800" TYPE="ext4" 
/dev/mapper/vg_centos-lv_swap: UUID="616df837-a5da-4165-8213-e439787bb648" TYPE="swap" 

方法六：

[root@centos block]# cat /etc/fstab 

#
# /etc/fstab
# Created by anaconda on Wed Mar 29 22:49:17 2017
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
/dev/mapper/vg_centos-lv_root /                       ext4    defaults        1 1
UUID=143da948-330f-4ace-acdf-ac22411df758 /boot                   ext4    defaults        1 2