Linux常用技巧系列: 查看磁盘空间占用df命令

（阅读时间5s）查看当前机器磁盘空间及占用量，命令为df，如下

[root@localhost]# df
Filesystem          1K-blocks      Used Available Use% Mounted on
/dev/mapper/cl-root  52403200  30371168  22032032  58% /
devtmpfs             65775924         0  65775924   0% /dev
tmpfs                65795872         0  65795872   0% /dev/shm
tmpfs                65795872     18168  65777704   1% /run
tmpfs                65795872         0  65795872   0% /sys/fs/cgroup
/dev/sda1             1038336    216480    821856  21% /boot

而用于挂载的查看可用的硬盘空间是fdisk -ls，不一样

[root@localhost]# fdisk -ls

Disk /dev/sdd: 1199.7 GB, 1199705161728 bytes, 2343174144 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes