【Linux】df
df(disk filesystem)命令用来获取磁盘文件系统的整体使用情况
[root@localhost /]# df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/mapper/centos-root 38770180 6426280 32343900 17% /
devtmpfs 486272 0 486272 0% /dev
tmpfs 503460 0 503460 0% /dev/shm
tmpfs 503460 8336 495124 2% /run
tmpfs 503460 0 503460 0% /sys/fs/cgroup
/dev/sda1 1038336 161912 876424 16% /boot
tmpfs 100696 12 100684 1% /run/user/42
tmpfs 100696 0 100696 0% /run/user/0
[root@localhost /]#
通过上面的输出，我们可以了解到对应的文件系统、总的block块数量、已使用空间、可用空间以及对应的挂载点.
df可以接受路径参数，主要是通过该路径所在的文件系统，来了解对应文件系统的磁盘使用情况.
[root@localhost /]# df -h /home/jiangjian/jenkins-2.164.1-1.1.noarch.rpm
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 37G 6.2G 31G 17% /
[root@localhost /]#
下面来了解常用的选型:
-a:用来显示包含虚拟的文件系统
[root@localhost /]# df -a
Filesystem 1K-blocks Used Available Use% Mounted on
rootfs - - - - /
sysfs 0 0 0 - /sys
proc 0 0 0 - /proc
devtmpfs 486272 0 486272 0% /dev
securityfs 0 0 0 - /sys/kernel/security
tmpfs 503460 0 503460 0% /dev/shm
devpts 0 0 0 - /dev/pts
tmpfs 503460 8336 495124 2% /run
tmpfs 503460 0 503460 0% /sys/fs/cgroup
cgroup 0 0 0 - /sys/fs/cgroup/systemd
pstore 0 0 0 - /sys/fs/pstore
cgroup 0 0 0 - /sys/fs/cgroup/cpu,cpuacct
cgroup 0 0 0 - /sys/fs/cgroup/pids
cgroup 0 0 0 - /sys/fs/cgroup/net_cls,net_prio
cgroup 0 0 0 - /sys/fs/cgroup/memory
cgroup 0 0 0 - /sys/fs/cgroup/devices
cgroup 0 0 0 - /sys/fs/cgroup/cpuset
cgroup 0 0 0 - /sys/fs/cgroup/perf_event
cgroup 0 0 0 - /sys/fs/cgroup/blkio
cgroup 0 0 0 - /sys/fs/cgroup/hugetlb
cgroup 0 0 0 - /sys/fs/cgroup/freezer
configfs 0 0 0 - /sys/kernel/config
/dev/mapper/centos-root 38770180 6426504 32343676 17% /
selinuxfs 0 0 0 - /sys/fs/selinux
systemd-1 - - - - /proc/sys/fs/binfmt_misc
debugfs 0 0 0 - /sys/kernel/debug
hugetlbfs 0 0 0 - /dev/hugepages
mqueue 0 0 0 - /dev/mqueue
/dev/sda1 1038336 161912 876424 16% /boot
sunrpc 0 0 0 - /var/lib/nfs/rpc_pipefs
tmpfs 100696 12 100684 1% /run/user/42
binfmt_misc 0 0 0 - /proc/sys/fs/binfmt_misc
tmpfs 100696 0 100696 0% /run/user/0
[root@localhost /]#
-h:控制大小的显示为易读的方式
[root@localhost /]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 37G 6.2G 31G 17% /
devtmpfs 475M 0 475M 0% /dev
tmpfs 492M 0 492M 0% /dev/shm
tmpfs 492M 8.2M 484M 2% /run
tmpfs 492M 0 492M 0% /sys/fs/cgroup
/dev/sda1 1014M 159M 856M 16% /boot
tmpfs 99M 12K 99M 1% /run/user/42
tmpfs 99M 0 99M 0% /run/user/0
[root@localhost /]#
-T:显示对应文件系统的类型
[root@localhost /]# df -hT
Filesystem Type Size Used Avail Use% Mounted on
/dev/mapper/centos-root xfs 37G 6.2G 31G 17% /
devtmpfs devtmpfs 475M 0 475M 0% /dev
tmpfs tmpfs 492M 0 492M 0% /dev/shm
tmpfs tmpfs 492M 8.2M 484M 2% /run
tmpfs tmpfs 492M 0 492M 0% /sys/fs/cgroup
/dev/sda1 xfs 1014M 159M 856M 16% /boot
tmpfs tmpfs 99M 12K 99M 1% /run/user/42
tmpfs tmpfs 99M 0 99M 0% /run/user/0
[root@localhost /]#
-h:控制输出的磁盘大小单位为:K
[root@localhost /]# df -k
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/mapper/centos-root 38770180 6426736 32343444 17% /
devtmpfs 486272 0 486272 0% /dev
tmpfs 503460 0 503460 0% /dev/shm
tmpfs 503460 8336 495124 2% /run
tmpfs 503460 0 503460 0% /sys/fs/cgroup
/dev/sda1 1038336 161912 876424 16% /boot
tmpfs 100696 12 100684 1% /run/user/42
tmpfs 100696 0 100696 0% /run/user/0
[root@localhost /]#
-m:控制输出的磁盘大小单位为:M
[root@localhost /]# df -m
Filesystem 1M-blocks Used Available Use% Mounted on
/dev/mapper/centos-root 37862 6277 31586 17% /
devtmpfs 475 0 475 0% /dev
tmpfs 492 0 492 0% /dev/shm
tmpfs 492 9 484 2% /run
tmpfs 492 0 492 0% /sys/fs/cgroup
/dev/sda1 1014 159 856 16% /boot
tmpfs 99 1 99 1% /run/user/42
tmpfs 99 0 99 0% /run/user/0
[root@localhost /]#
-i:控制输出的磁盘大小单位为:inode
[root@localhost /]# df -i
Filesystem Inodes IUsed IFree IUse% Mounted on
/dev/mapper/centos-root 19394560 179427 19215133 1% /
devtmpfs 121568 397 121171 1% /dev
tmpfs 125865 1 125864 1% /dev/shm
tmpfs 125865 844 125021 1% /run
tmpfs 125865 16 125849 1% /sys/fs/cgroup
/dev/sda1 524288 370 523918 1% /boot
tmpfs 125865 9 125856 1% /run/user/42
tmpfs 125865 1 125864 1% /run/user/0
[root@localhost /]#
-t:控制输出符合给定类型的文件系统
[root@localhost /]# df -T
Filesystem Type 1K-blocks Used Available Use% Mounted on
/dev/mapper/centos-root xfs 38770180 6426292 32343888 17% /
devtmpfs devtmpfs 486272 0 486272 0% /dev
tmpfs tmpfs 503460 0 503460 0% /dev/shm
tmpfs tmpfs 503460 8336 495124 2% /run
tmpfs tmpfs 503460 0 503460 0% /sys/fs/cgroup
/dev/sda1 xfs 1038336 161912 876424 16% /boot
tmpfs tmpfs 100696 12 100684 1% /run/user/42
tmpfs tmpfs 100696 0 100696 0% /run/user/0
[root@localhost /]# df -T -x xfs
Filesystem Type 1K-blocks Used Available Use% Mounted on
devtmpfs devtmpfs 486272 0 486272 0% /dev
tmpfs tmpfs 503460 0 503460 0% /dev/shm
tmpfs tmpfs 503460 8336 495124 2% /run
tmpfs tmpfs 503460 0 503460 0% /sys/fs/cgroup
tmpfs tmpfs 100696 12 100684 1% /run/user/42
tmpfs tmpfs 100696 0 100696 0% /run/user/0
[root@localhost /]#
-x:剔除符合给定类型的文件系统
[root@localhost /]# df -x ext3
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/mapper/centos-root 38770180 6426736 32343444 17% /
devtmpfs 486272 0 486272 0% /dev
tmpfs 503460 0 503460 0% /dev/shm
tmpfs 503460 8336 495124 2% /run
tmpfs 503460 0 503460 0% /sys/fs/cgroup
/dev/sda1 1038336 161912 876424 16% /boot
tmpfs 100696 12 100684 1% /run/user/42
tmpfs 100696 0 100696 0% /run/user/0
[root@localhost /]#