On the internet, you will find plenty of tools for checking disk space utilization in Linux. However, Linux has a strong built-in utility called ‘df‘.
The ‘df‘ command stands for “disk filesystem“, it is used to get a full summary of available and used disk space usage of the file system on the Linux system.
Using ‘-h‘ parameter with (df -h) will show the file system disk space statistics in “human-readable” format, means it gives the details in bytes, megabytes, and gigabyte.
This article explains a way to get the full information of Linux disk space usage with the help of the ‘df‘ command with their practical examples. So, you could better understand the usage of the df command in Linux.
1. Check File System Disk Space Usage
The “df” command displays the information of device name, total blocks, total disk space, used disk space, available disk space, and mount points on a file system.
[root@tecmint ~]# df Filesystem 1K-blocks Used Available Use% Mounted on /dev/cciss/c0d0p2 78361192 23185840 51130588 32% / /dev/cciss/c0d0p5 24797380 22273432 1243972 95% /home /dev/cciss/c0d0p3 29753588 25503792 2713984 91% /data /dev/cciss/c0d0p1 295561 21531 258770 8% /boot tmpfs 257476 0 257476 0% /dev/shm
2. Display Information of all File System Disk Space Usage
The same as above, but it also displays information of dummy file systems along with all the file system disk usage and their memory utilization.
[root@tecmint ~]# df -a Filesystem 1K-blocks Used Available Use% Mounted on /dev/cciss/c0d0p2 78361192 23186116 51130312 32% / proc 0 0 0 - /proc sysfs 0 0 0 - /sys devpts 0 0 0 - /dev/pts /dev/cciss/c0d0p5 24797380 22273432 1243972 95% /home /dev/cciss/c0d0p3 29753588 25503792 2713984 91% /data /dev/cciss/c0d0p1 295561 21531 258770 8% /boot tmpfs 257476 0 257476 0% /dev/shm none 0 0 0 - /proc/sys/fs/binfmt_misc sunrpc 0 0 0 - /var/lib/nfs/rpc_pipefs
3. Show Disk Space Usage in Human Readable Format
Have you noticed that the above commands display information in bytes, which is not readable at all because we are in a habit of reading the sizes in megabytes, gigabytes, etc. as it makes it very easy to understand and remember.
The df command provides an option to display sizes in Human Readable formats by using '-h' (prints the results in human-readable format (e.g., 1K 2M 3G)).
[root@tecmint ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/cciss/c0d0p2 75G 23G 49G 32% / /dev/cciss/c0d0p5 24G 22G 1.2G 95% /home /dev/cciss/c0d0p3 29G 25G 2.6G 91% /data /dev/cciss/c0d0p1 289M 22M 253M 8% /boot tmpfs 252M 0 252M 0% /dev/shm
4. Display Information of /home File System
To see the information of only device /home file systems in human-readable format use the following command.
[root@tecmint ~]# df -hT /home Filesystem Type Size Used Avail Use% Mounted on /dev/cciss/c0d0p5 ext3 24G 22G 1.2G 95% /home
5. Display Information of File System in Bytes
To display all file system information and usage in 1024-byte blocks, use the option ‘-k‘ (e.g. --block-size=1K) as follows.
[root@tecmint ~]# df -k Filesystem 1K-blocks Used Available Use% Mounted on /dev/cciss/c0d0p2 78361192 23187212 51129216 32% / /dev/cciss/c0d0p5 24797380 22273432 1243972 95% /home /dev/cciss/c0d0p3 29753588 25503792 2713984 91% /data /dev/cciss/c0d0p1 295561 21531 258770 8% /boot tmpfs 257476 0 257476 0% /dev/shm
6. Display Information of File System in MB
To display information of all file system usage in MB (MegaByte) use the option ‘-m‘.
[root@tecmint ~]# df -m Filesystem 1M-blocks Used Available Use% Mounted on /dev/cciss/c0d0p2 76525 22644 49931 32% / /dev/cciss/c0d0p5 24217 21752 1215 95% /home /dev/cciss/c0d0p3 29057 24907 2651 91% /data /dev/cciss/c0d0p1 289 22 253 8% /boot tmpfs 252 0 252 0% /dev/shm
7. Display Information of File System in GB
To display information of all file system statistics in GB (Gigabyte) use the option as ‘df -h‘.
[root@tecmint ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/cciss/c0d0p2 75G 23G 49G 32% / /dev/cciss/c0d0p5 24G 22G 1.2G 95% /home /dev/cciss/c0d0p3 29G 25G 2.6G 91% /data /dev/cciss/c0d0p1 289M 22M 253M 8% /boot tmpfs 252M 0 252M 0% /dev/shm
8. Display File System Inodes
Using ‘-i‘ switch will display the information of a number of used inodes and their percentage for the file system.
[root@tecmint ~]# df -i Filesystem Inodes IUsed IFree IUse% Mounted on /dev/cciss/c0d0p2 20230848 133143 20097705 1% / /dev/cciss/c0d0p5 6403712 798613 5605099 13% /home /dev/cciss/c0d0p3 7685440 1388241 6297199 19% /data /dev/cciss/c0d0p1 76304 40 76264 1% /boot tmpfs 64369 1 64368 1% /dev/shm
[ You might also like: How to Increase Disk Inode Number in Linux ]
9. Display File System Type
If you notice all the above commands output, you will see there is no Linux file system type mentioned in the results. To check the file system type of your system use the option ‘T‘. It will display file system type along with other information.
[root@tecmint ~]# df -T Filesystem Type 1K-blocks Used Available Use% Mounted on /dev/cciss/c0d0p2 ext3 78361192 23188812 51127616 32% / /dev/cciss/c0d0p5 ext3 24797380 22273432 1243972 95% /home /dev/cciss/c0d0p3 ext3 29753588 25503792 2713984 91% /data /dev/cciss/c0d0p1 ext3 295561 21531 258770 8% /boot tmpfs tmpfs 257476 0 257476 0% /dev/shm
10. Include Certain File System Type
If you want to display a certain file system type use the ‘-t‘ option. For example, the following command will only display the ext3 file system.
[root@tecmint ~]# df -t ext3 Filesystem 1K-blocks Used Available Use% Mounted on /dev/cciss/c0d0p2 78361192 23190072 51126356 32% / /dev/cciss/c0d0p5 24797380 22273432 1243972 95% /home /dev/cciss/c0d0p3 29753588 25503792 2713984 91% /data /dev/cciss/c0d0p1 295561 21531 258770 8% /boot
11. Exclude Certain File System Type
If you want to display a file system type that doesn’t belongs to the ext3 type use the option ‘-x‘. For example, the following command will only display other file systems types other than ext3.
[root@tecmint ~]# df -x ext3 Filesystem 1K-blocks Used Available Use% Mounted on tmpfs 257476 0 257476 0% /dev/shm
12. Display Information of df Command.
Using '--help‘ switch will display a list of available option that is used with df command.
[root@tecmint ~]# df --help
Usage: df [OPTION]... [FILE]...
Show information about the file system on which each FILE resides,
or all file systems by default.
Mandatory arguments to long options are mandatory for short options too.
-a, --all include dummy file systems
-B, --block-size=SIZE use SIZE-byte blocks
-h, --human-readable print sizes in human readable format (e.g., 1K 234M 2G)
-H, --si likewise, but use powers of 1000 not 1024
-i, --inodes list inode information instead of block usage
-k like --block-size=1K
-l, --local limit listing to local file systems
--no-sync do not invoke sync before getting usage info (default)
-P, --portability use the POSIX output format
--sync invoke sync before getting usage info
-t, --type=TYPE limit listing to file systems of type TYPE
-T, --print-type print file system type
-x, --exclude-type=TYPE limit listing to file systems, not of type TYPE
-v (ignored)
--help display this help and exit
--version output version information and exit
SIZE may be (or maybe an integer optionally followed by) one of the following:
kB 1000, K 1024, MB 1000*1000, M 1024*1024, and so on for G, T, P, E, Z, Y.
Report bugs to <[email protected]>.
Read Also :
The ‘df‘ command stands for “disk filesystem”
This is incorrect. ‘df‘ stands for “disk free“.
@Benjamin,
The command ‘df’ stands for disk free – see – https://en.wikipedia.org/wiki/Df_(Unix)
To display information of all file system statistics in GB (Gigabyte) use the option as
‘df -g‘;)Hello all,
I am a newbie to Linux. I am using CentOS 7 in VMWare.
I tried
df -th xfsand got an error asBut when i reversed the flags and did ‘df -ht xfs‘, I got the proper output.
So my question is that do we have an overriding concept when it comes to flags as I was confused that why in it showed no such file error with
-th?option?A person’s success does not depend on his wisdom, but perseverance.
I still don’t know how much disk space i have left.
@Paolo,
The
df -hTwill display the size of all partitions table, there you can easily trace how much space utilized and left on each partition.use du not df or better ncdu.
df actually stands for: Disk free
from wikipedia: https://en.wikipedia.org/wiki/Df_(Unix)
Achtually, if you want to be super correct
df -hshows usage in Gibibytes,df -Hshows Gigabytes. The difference gets noticeable at high amounts and people are more used to thinking in Giga rather than Gibi no matter how much computer techs would prefer it to be the other way around.You have put the details other way around
-huses 1024 where as-Huses powers of 1000.-Hnumbers would be significantly higher than-h.I don’t see I left any details on which one is bigger in my original comment. People do get confused when you tell them they have fewer GiB (1024) than they expected since they are used to the smaller GB (1000).
And here in lies the problem with this nonsense called gibibytes etc.
I am a computer tech and no other computer techs I know (under the age of 30), give this ridiculous notion of a megabyte being 1000×1000 any time of day.
Sorry but a megabyte WILL ALWAYS be 1024 kilobytes (1024 bytes) x 1024 kilobytes no matter how hard the push is to rename computing standards to fall in line with other standards of measurements i.e kilogram, kilometre etc
It’s a real pity that in Linux you can’t show file sizes in traditional/correct megabytes, gigabytes etc
I see Gibibyte and I think Gigabyte. THAT and mass confusion is all this nonsense has achieved.
I meant to say ‘over the age of 30’ ;)