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‘. Show
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 UsageThe “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. 2. Display Information of all File System Disk Space UsageThe same as above, but it also displays information of dummy file systems along with all the file system disk usage and their memory utilization. [[email protected] ~]# 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_pipefs3. Show Disk Space Usage in Human Readable FormatHave 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)). [[email protected] ~]# 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/shm4. Display Information of /home File SystemTo see the information of only device /home file systems in human-readable format use the following command. [[email protected] ~]# df -hT /home Filesystem Type Size Used Avail Use% Mounted on /dev/cciss/c0d0p5 ext3 24G 22G 1.2G 95% /home5. Display Information of File System in BytesTo display all file system information and usage in 1024-byte blocks, use the option ‘-k‘ (e.g. --block-size=1K) as follows. 6. Display Information of File System in MBTo display information of all file system usage in MB (MegaByte) use the option ‘-m‘. [[email protected] ~]# 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/shm7. Display Information of File System in GBTo display information of all file system statistics in GB (Gigabyte) use the option as ‘df -h‘. [[email protected] ~]# 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/shm8. Display File System InodesUsing ‘-i‘ switch will display the information of a number of used inodes and their percentage for the file system. [[email protected] ~]# 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 TypeIf 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. 10. Include Certain File System TypeIf 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. [[email protected] ~]# 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% /boot11. Exclude Certain File System TypeIf 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. [[email protected] ~]# df -x ext3 Filesystem 1K-blocks Used Available Use% Mounted on tmpfs 257476 0 257476 0% /dev/shm12. Display Information of df Command.Using '--help‘ switch will display a list of available option that is used with df command. [[email protected] ~]# 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 :
If You Appreciate What We Do Here On TecMint, You Should Consider:TecMint is the fastest growing and most trusted community site for any kind of Linux Articles, Guides and Books on the web. Millions of people visit TecMint! to search or browse the thousands of published articles available FREELY to all. If you like what you are reading, please consider buying us a coffee ( or 2 ) as a token of appreciation. We are thankful for your never ending support. Which command can be used to display information about block storage devices?The block device is the physical device where the filesystem is written. The filesystem, in turn, dictates how data and files are stored. The lsblk utility can be used to display information about block devices easily.
Which command is used to display the amount of free space that exists on a filesystem?df — Display the amount of free space in the file system.
What creates the virtual device and passes data from that virtual device to one or more physical devices?In Linux the device mapper creates the virtual device, then passes data from the virtual device to one of the physical devices that make up the virtual device.
What is an object that stores metadata about a file or directory on a file system?A file system's metadata is typically referred to as its file attributes. The Files class includes methods that can be used to obtain a single attribute of a file, or to set an attribute.
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Which command displays information about all block storage devices that are currently available on the system?
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