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听雨#xff1a;一名在一线从事多年研发的程序员#xff0c;从事网站后台开发#xff0c;熟悉java技术栈#xff0c;对前端技术也有研究#xff0c;同时也是一名骑行爱好者。 D…Linux常用命令之df命令 文章目录 Linux常用命令之df命令常用命令之df背景介绍 总结 作者简介
听雨一名在一线从事多年研发的程序员从事网站后台开发熟悉java技术栈对前端技术也有研究同时也是一名骑行爱好者。 Darren一个工作经验用了N年的资深划水人士除了工作无其他爱好
口号记录在开发中遇到日常问题、棘手问题的解法和思路
常用命令之df
背景介绍
df 于显示系统中所有文件系统的磁盘空间使用情况可以提供磁盘已用大小、总大小、可用空间、已用空间以及挂载点灯信息是Linux中基本命令之一。
常用参数
参数解释-a显示所有文件系统-h更已读的方式显示-H以1kb1000b为单位换算-i显示索引字节信息-k显示时的块大小-l只显示本地文件系统-t只展示指定类型的文件系统-T显示文件系统类型-sync在获取磁盘使用信息前先执行sync同步命令
例如 默认情况下df只显示具有可用空间的文件系统。使用-a参数可以显示所有文件系统包括那些没有挂载的。
rootmaster:~/temp/df# df
Filesystem 1K-blocks Used Available Use% Mounted on
tmpfs 1420544 1288 1419256 1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv 152426844 35996080 109703968 25% /
tmpfs 7102712 28 7102684 1% /dev/shm
tmpfs 5120 0 5120 0% /run/lock
/dev/sda2 1992552 258320 1612992 14% /boot
overlay 152426844 35996080 109703968 25% /var/lib/docker/overlay2/4faf7ecb6ebe8f8b2ab43f185eb054e52302c91321ab0abdd4ad6c4ec4fab018/merged
overlay 152426844 35996080 109703968 25% /var/lib/docker/overlay2/07579c76864d8db0e054ccf6fec1eef9522883de063685f55b5143539ce3b36e/merged
overlay 152426844 35996080 109703968 25% /var/lib/docker/overlay2/1750ec67b9fe01f114dfc060bf7341a1ac5d4980390a852ff2cf5fab960202e9/merged
overlay 152426844 35996080 109703968 25% /var/lib/docker/overlay2/4399b617478c7c610556b64aa87b00a756867cedee44aed443209e8897af9091/merged
overlay 152426844 35996080 109703968 25% /var/lib/docker/overlay2/6b9f8b5f8b5969a8b67f11901f87ed76412ea5da0d6816f16b41c790a13fd913/merged
tmpfs 1420540 4 1420536 1% /run/user/1000
rootmaster:~/temp/df#
# 对比一下
rootmaster:~/temp/df# df -a
Filesystem 1K-blocks Used Available Use% Mounted on
sysfs 0 0 0 - /sys
proc 0 0 0 - /proc
udev 7044464 0 7044464 0% /dev
devpts 0 0 0 - /dev/pts
tmpfs 1420544 1288 1419256 1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv 152426844 35996012 109704036 25% /
securityfs 0 0 0 - /sys/kernel/security
tmpfs 7102712 28 7102684 1% /dev/shm
tmpfs 5120 0 5120 0% /run/lock
cgroup2 0 0 0 - /sys/fs/cgroup
pstore 0 0 0 - /sys/fs/pstore
bpf 0 0 0 - /sys/fs/bpf
systemd-1 - - - - /proc/sys/fs/binfmt_misc
hugetlbfs 0 0 0 - /dev/hugepages
mqueue 0 0 0 - /dev/mqueue
debugfs 0 0 0 - /sys/kernel/debug
tracefs 0 0 0 - /sys/kernel/tracing
fusectl 0 0 0 - /sys/fs/fuse/connections
configfs 0 0 0 - /sys/kernel/config
none 0 0 0 - /run/credentials/systemd-sysusers.service
/dev/sda2 1992552 258320 1612992 14% /boot
binfmt_misc 0 0 0 - /proc/sys/fs/binfmt_misc
overlay 152426844 35996012 109704036 25% /var/lib/docker/overlay2/4faf7ecb6ebe8f8b2ab43f185eb054e52302c91321ab0abdd4ad6c4ec4fab018/merged
overlay 152426844 35996012 109704036 25% /var/lib/docker/overlay2/07579c76864d8db0e054ccf6fec1eef9522883de063685f55b5143539ce3b36e/merged
overlay 152426844 35996012 109704036 25% /var/lib/docker/overlay2/1750ec67b9fe01f114dfc060bf7341a1ac5d4980390a852ff2cf5fab960202e9/merged
overlay 152426844 35996012 109704036 25% /var/lib/docker/overlay2/4399b617478c7c610556b64aa87b00a756867cedee44aed443209e8897af9091/merged
overlay 152426844 35996012 109704036 25% /var/lib/docker/overlay2/6b9f8b5f8b5969a8b67f11901f87ed76412ea5da0d6816f16b41c790a13fd913/merged
nsfs 0 0 0 - /run/docker/netns/f3710e73563a
nsfs 0 0 0 - /run/docker/netns/10fa49d5fd1c
nsfs 0 0 0 - /run/docker/netns/1bb1055b3183
nsfs 0 0 0 - /run/docker/netns/0ef401d290d8
nsfs 0 0 0 - /run/docker/netns/38e83208bfad
tmpfs 1420540 4 1420536 1% /run/user/1000
rootmaster:~/temp/df# 更宜读的方式
rootmaster:~/temp/df# df -h
Filesystem Size Used Avail Use% Mounted on
tmpfs 1.4G 1.3M 1.4G 1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv 146G 35G 105G 25% /
tmpfs 6.8G 28K 6.8G 1% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
/dev/sda2 2.0G 253M 1.6G 14% /boot
overlay 146G 35G 105G 25% /var/lib/docker/overlay2/4faf7ecb6ebe8f8b2ab43f185eb054e52302c91321ab0abdd4ad6c4ec4fab018/merged
overlay 146G 35G 105G 25% /var/lib/docker/overlay2/07579c76864d8db0e054ccf6fec1eef9522883de063685f55b5143539ce3b36e/merged
overlay 146G 35G 105G 25% /var/lib/docker/overlay2/1750ec67b9fe01f114dfc060bf7341a1ac5d4980390a852ff2cf5fab960202e9/merged
overlay 146G 35G 105G 25% /var/lib/docker/overlay2/4399b617478c7c610556b64aa87b00a756867cedee44aed443209e8897af9091/merged
overlay 146G 35G 105G 25% /var/lib/docker/overlay2/6b9f8b5f8b5969a8b67f11901f87ed76412ea5da0d6816f16b41c790a13fd913/merged
tmpfs 1.4G 4.0K 1.4G 1% /run/user/1000
rootmaster:~/temp/df#
按照1000的进位展示所以有时候会觉得不太准确
rootmaster:~/temp/df# df -H
Filesystem Size Used Avail Use% Mounted on
tmpfs 1.5G 1.4M 1.5G 1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv 157G 37G 113G 25% /
tmpfs 7.3G 29k 7.3G 1% /dev/shm
tmpfs 5.3M 0 5.3M 0% /run/lock
/dev/sda2 2.1G 265M 1.7G 14% /boot
overlay 157G 37G 113G 25% /var/lib/docker/overlay2/4faf7ecb6ebe8f8b2ab43f185eb054e52302c91321ab0abdd4ad6c4ec4fab018/merged
overlay 157G 37G 113G 25% /var/lib/docker/overlay2/07579c76864d8db0e054ccf6fec1eef9522883de063685f55b5143539ce3b36e/merged
overlay 157G 37G 113G 25% /var/lib/docker/overlay2/1750ec67b9fe01f114dfc060bf7341a1ac5d4980390a852ff2cf5fab960202e9/merged
overlay 157G 37G 113G 25% /var/lib/docker/overlay2/4399b617478c7c610556b64aa87b00a756867cedee44aed443209e8897af9091/merged
overlay 157G 37G 113G 25% /var/lib/docker/overlay2/6b9f8b5f8b5969a8b67f11901f87ed76412ea5da0d6816f16b41c790a13fd913/merged
tmpfs 1.5G 4.1k 1.5G 1% /run/user/1000
rootmaster:~/temp/df# 显示节点信息
rootmaster:~/temp/df# df -i
Filesystem Inodes IUsed IFree IUse% Mounted on
tmpfs 1775678 934 1774744 1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv 9699328 491361 9207967 6% /
tmpfs 1775678 2 1775676 1% /dev/shm
tmpfs 1775678 3 1775675 1% /run/lock
/dev/sda2 131072 320 130752 1% /boot
overlay 9699328 491361 9207967 6% /var/lib/docker/overlay2/4faf7ecb6ebe8f8b2ab43f185eb054e52302c91321ab0abdd4ad6c4ec4fab018/merged
overlay 9699328 491361 9207967 6% /var/lib/docker/overlay2/07579c76864d8db0e054ccf6fec1eef9522883de063685f55b5143539ce3b36e/merged
overlay 9699328 491361 9207967 6% /var/lib/docker/overlay2/1750ec67b9fe01f114dfc060bf7341a1ac5d4980390a852ff2cf5fab960202e9/merged
overlay 9699328 491361 9207967 6% /var/lib/docker/overlay2/4399b617478c7c610556b64aa87b00a756867cedee44aed443209e8897af9091/merged
overlay 9699328 491361 9207967 6% /var/lib/docker/overlay2/6b9f8b5f8b5969a8b67f11901f87ed76412ea5da0d6816f16b41c790a13fd913/merged
tmpfs 355135 25 355110 1% /run/user/1000
rootmaster:~/temp/df# 显示块大小
rootmaster:~/temp/df# df -k
Filesystem 1K-blocks Used Available Use% Mounted on
tmpfs 1420544 1288 1419256 1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv 152426844 35996536 109703512 25% /
tmpfs 7102712 28 7102684 1% /dev/shm
tmpfs 5120 0 5120 0% /run/lock
/dev/sda2 1992552 258320 1612992 14% /boot
overlay 152426844 35996536 109703512 25% /var/lib/docker/overlay2/4faf7ecb6ebe8f8b2ab43f185eb054e52302c91321ab0abdd4ad6c4ec4fab018/merged
overlay 152426844 35996536 109703512 25% /var/lib/docker/overlay2/07579c76864d8db0e054ccf6fec1eef9522883de063685f55b5143539ce3b36e/merged
overlay 152426844 35996536 109703512 25% /var/lib/docker/overlay2/1750ec67b9fe01f114dfc060bf7341a1ac5d4980390a852ff2cf5fab960202e9/merged
overlay 152426844 35996536 109703512 25% /var/lib/docker/overlay2/4399b617478c7c610556b64aa87b00a756867cedee44aed443209e8897af9091/merged
overlay 152426844 35996536 109703512 25% /var/lib/docker/overlay2/6b9f8b5f8b5969a8b67f11901f87ed76412ea5da0d6816f16b41c790a13fd913/merged
tmpfs 1420540 4 1420536 1% /run/user/1000
rootmaster:~/temp/df# 显示本地系统有网络盘则不显示
rootmaster:~/temp/df# df -l
Filesystem 1K-blocks Used Available Use% Mounted on
tmpfs 1420544 1288 1419256 1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv 152426844 35996616 109703432 25% /
tmpfs 7102712 28 7102684 1% /dev/shm
tmpfs 5120 0 5120 0% /run/lock
/dev/sda2 1992552 258320 1612992 14% /boot
overlay 152426844 35996616 109703432 25% /var/lib/docker/overlay2/4faf7ecb6ebe8f8b2ab43f185eb054e52302c91321ab0abdd4ad6c4ec4fab018/merged
overlay 152426844 35996616 109703432 25% /var/lib/docker/overlay2/07579c76864d8db0e054ccf6fec1eef9522883de063685f55b5143539ce3b36e/merged
overlay 152426844 35996616 109703432 25% /var/lib/docker/overlay2/1750ec67b9fe01f114dfc060bf7341a1ac5d4980390a852ff2cf5fab960202e9/merged
overlay 152426844 35996616 109703432 25% /var/lib/docker/overlay2/4399b617478c7c610556b64aa87b00a756867cedee44aed443209e8897af9091/merged
overlay 152426844 35996616 109703432 25% /var/lib/docker/overlay2/6b9f8b5f8b5969a8b67f11901f87ed76412ea5da0d6816f16b41c790a13fd913/merged
tmpfs 1420540 4 1420536 1% /run/user/1000
rootmaster:~/temp/df# 指定文件类型查看
rootmaster:~/temp/df# df -t tmpfs
Filesystem 1K-blocks Used Available Use% Mounted on
tmpfs 1420544 1288 1419256 1% /run
tmpfs 7102712 28 7102684 1% /dev/shm
tmpfs 5120 0 5120 0% /run/lock
tmpfs 1420540 4 1420536 1% /run/user/1000
rootmaster:~/temp/df#
显示文件类型
rootmaster:~/temp/df# df -T
Filesystem Type 1K-blocks Used Available Use% Mounted on
tmpfs tmpfs 1420544 1288 1419256 1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv ext4 152426844 35996900 109703148 25% /
tmpfs tmpfs 7102712 28 7102684 1% /dev/shm
tmpfs tmpfs 5120 0 5120 0% /run/lock
/dev/sda2 ext4 1992552 258320 1612992 14% /boot
overlay overlay 152426844 35996900 109703148 25% /var/lib/docker/overlay2/4faf7ecb6ebe8f8b2ab43f185eb054e52302c91321ab0abdd4ad6c4ec4fab018/merged
overlay overlay 152426844 35996900 109703148 25% /var/lib/docker/overlay2/07579c76864d8db0e054ccf6fec1eef9522883de063685f55b5143539ce3b36e/merged
overlay overlay 152426844 35996900 109703148 25% /var/lib/docker/overlay2/1750ec67b9fe01f114dfc060bf7341a1ac5d4980390a852ff2cf5fab960202e9/merged
overlay overlay 152426844 35996900 109703148 25% /var/lib/docker/overlay2/4399b617478c7c610556b64aa87b00a756867cedee44aed443209e8897af9091/merged
overlay overlay 152426844 35996900 109703148 25% /var/lib/docker/overlay2/6b9f8b5f8b5969a8b67f11901f87ed76412ea5da0d6816f16b41c790a13fd913/merged
tmpfs tmpfs 1420540 4 1420536 1% /run/user/1000
rootmaster:~/temp/df# 我习惯用的有df -TH显示容量情况
rootmaster:~/temp/df# df -Th
Filesystem Type Size Used Avail Use% Mounted on
tmpfs tmpfs 1.4G 1.3M 1.4G 1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv ext4 146G 35G 105G 25% /
tmpfs tmpfs 6.8G 28K 6.8G 1% /dev/shm
tmpfs tmpfs 5.0M 0 5.0M 0% /run/lock
/dev/sda2 ext4 2.0G 253M 1.6G 14% /boot
overlay overlay 146G 35G 105G 25% /var/lib/docker/overlay2/4faf7ecb6ebe8f8b2ab43f185eb054e52302c91321ab0abdd4ad6c4ec4fab018/merged
overlay overlay 146G 35G 105G 25% /var/lib/docker/overlay2/07579c76864d8db0e054ccf6fec1eef9522883de063685f55b5143539ce3b36e/merged
overlay overlay 146G 35G 105G 25% /var/lib/docker/overlay2/1750ec67b9fe01f114dfc060bf7341a1ac5d4980390a852ff2cf5fab960202e9/merged
overlay overlay 146G 35G 105G 25% /var/lib/docker/overlay2/4399b617478c7c610556b64aa87b00a756867cedee44aed443209e8897af9091/merged
overlay overlay 146G 35G 105G 25% /var/lib/docker/overlay2/6b9f8b5f8b5969a8b67f11901f87ed76412ea5da0d6816f16b41c790a13fd913/merged
tmpfs tmpfs 1.4G 4.0K 1.4G 1% /run/user/1000
rootmaster:~/temp/df# 总结
df命令是Linux系统中不可或缺的工具之一可以让我们对磁盘使用情况有个直观的认识通过使用df命令加上对应的参数可以完成不同的使用场景从而更好地管理磁盘资源。
参考《Linux常用命令自学手册》
