Useful 9 (df) Linux Commands to Check Disk Space
In this article, we going to see how to check disk space using Linux commands, Here we have the various method and in online we have a lot of tools for checking disk space utilization in Linux. In Linux we have built-in service called “df” this command stands for “disk filesystem“, this is useful to get full detailed empty disk space and used disk space of the Linux system files.
This section explains a method to get the full information of Linux disk space usage with the help of “df” command. Hence, you could entirely understand the usage of “df” Linux command.
1. Display Usage of File System Disk Space
Following this “df” command displays the information of blocks, disk used space, disk available space and mounted on a file system.
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[softaox@172-143-123-20 ~]$ df Filesystem 1K-blocks Used Available Use% Mounted on /dev/vda1 62903276 29745072 33158204 48% / devtmpfs 1929488 0 1929488 0% /dev tmpfs 1940196 0 1940196 0% /dev/shm tmpfs 1940196 186960 1753236 10% /run tmpfs 1940196 0 1940196 0% /sys/fs/cgroup /dev/loop0 2103452 3736 1989536 1% /tmp tmpfs 388040 0 388040 0% /run/user/0 |
2. Display the Detailed Usage of all File System Disk Space
Using “df -a” command we display the detailed information about all the file system disk usage including dummy file systems along with their memory usage also.
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[softaox@172-143-123-20 ~]$ df -a Filesystem 1K-blocks Used Available Use% Mounted on rootfs - - - - / sysfs 0 0 0 - /sys proc 0 0 0 - /proc devtmpfs 1929488 0 1929488 0% /dev securityfs 0 0 0 - /sys/kernel/security tmpfs 1940196 0 1940196 0% /dev/shm devpts 0 0 0 - /dev/pts tmpfs 1940196 186952 1753244 10% /run tmpfs 1940196 0 1940196 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/perf_event cgroup 0 0 0 - /sys/fs/cgroup/freezer cgroup 0 0 0 - /sys/fs/cgroup/pids cgroup 0 0 0 - /sys/fs/cgroup/cpu,cpuacct cgroup 0 0 0 - /sys/fs/cgroup/blkio 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/cpuset cgroup 0 0 0 - /sys/fs/cgroup/hugetlb cgroup 0 0 0 - /sys/fs/cgroup/devices configfs 0 0 0 - /sys/kernel/config /dev/vda1 62903276 29753704 33149572 48% / 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/loop0 2103452 3736 1989536 1% /tmp /dev/loop0 2103452 3736 1989536 1% /var/tmp binfmt_misc 0 0 0 - /proc/sys/fs/binfmt_misc tmpfs 388040 0 388040 0% /run/user/0 fusectl 0 0 0 - /sys/fs/fuse/connections |
3. Display the Disk space usage in Human Readable Format
We all understand the sizes in the format like megabytes, gigabytes, terabyte, etc. But in above all commands we can’t see in the Human Readable format. Using the “df -h” command will helpful to display sizes in Human Readable formats like 50K 50M, 50G.
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[softaox@172-143-123-20 ~]$ df -h Filesystem Size Used Avail Use% Mounted on /dev/vda1 60G 29G 32G 48% / devtmpfs 1.9G 0 1.9G 0% /dev tmpfs 1.9G 0 1.9G 0% /dev/shm tmpfs 1.9G 183M 1.7G 10% /run tmpfs 1.9G 0 1.9G 0% /sys/fs/cgroup /dev/loop0 2.1G 3.7M 1.9G 1% /tmp tmpfs 379M 0 379M 0% /run/user/0 |
4. Display the File System in Bytes Format
Following this command “df -k” we display the file system information and usage in 1024-byte blocks.
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[softaox@172-143-123-20 ~]$ df -k Filesystem 1K-blocks Used Available Use% Mounted on /dev/vda1 62903276 29755564 33147712 48% / devtmpfs 1929488 0 1929488 0% /dev tmpfs 1940196 0 1940196 0% /dev/shm tmpfs 1940196 186952 1753244 10% /run tmpfs 1940196 0 1940196 0% /sys/fs/cgroup /dev/loop0 2103452 3736 1989536 1% /tmp tmpfs 388040 0 388040 0% /run/user/0 |
5. Display the File System in MegaByte (MB) Format
Following this command “df -m” we display the file system usage in MegaByte (MB) format.
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[softaox@172-143-123-20 ~]$ df -m Filesystem 1M-blocks Used Available Use% Mounted on /dev/vda1 61429 29050 32380 48% / devtmpfs 1885 0 1885 0% /dev tmpfs 1895 0 1895 0% /dev/shm tmpfs 1895 183 1713 10% /run tmpfs 1895 0 1895 0% /sys/fs/cgroup /dev/loop0 2055 4 1943 1% /tmp tmpfs 379 0 379 0% /run/user/0 |
6. Display /home File System Device Information
Using this “df -h /home” command we can display only /home file system device information in Human Readable format.
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[softaox@172-143-123-20 ~]$ df -h /home Filesystem Size Used Avail Use% Mounted on /dev/vda1 60G 29G 32G 48% / |
7. Display the File System Inodes
In this, we can see the file system used inodes and their percentage using “df -i” command.
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[softaox@172-143-123-20 ~]$ df -i Filesystem Inodes IUsed IFree IUse% Mounted on /dev/vda1 31456704 902021 30554683 3% / devtmpfs 482372 327 482045 1% /dev tmpfs 485049 1 485048 1% /dev/shm tmpfs 485049 600 484449 1% /run tmpfs 485049 16 485033 1% /sys/fs/cgroup /dev/loop0 137904 132 137772 1% /tmp tmpfs 485049 1 485048 1% /run/user/0 |
8. Display the Detailed Information About File System Type
It is easy to see the system file type of your system along with other details above previous commands, not displayed information about system file type using “df -T” we can able to see the file type.
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[softaox@172-143-123-20 ~]$ df -T Filesystem Type 1K-blocks Used Available Use% Mounted on /dev/vda1 xfs 62903276 29746300 33156976 48% / devtmpfs devtmpfs 1929488 0 1929488 0% /dev tmpfs tmpfs 1940196 0 1940196 0% /dev/shm tmpfs tmpfs 1940196 186952 1753244 10% /run tmpfs tmpfs 1940196 0 1940196 0% /sys/fs/cgroup /dev/loop0 ext3 2103452 3736 1989536 1% /tmp tmpfs tmpfs 388040 0 388040 0% /run/user/0 |
9. Display Options & Help Using “df –help” Command
Using “df –help” we can display available options in “df” command.
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[softaox@172-143-123-20 ~]$ 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 pseudo, duplicate, inaccessible file systems -B, --block-size=SIZE scale sizes by SIZE before printing them; e.g., '-BM' prints sizes in units of 1,048,576 bytes; see SIZE format below --direct show statistics for a file instead of mount point --total produce a grand total -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) --output[=FIELD_LIST] use the output format defined by FIELD_LIST, or print all fields if FIELD_LIST is omitted. -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 Display values are in units of the first available SIZE from --block-size, and the DF_BLOCK_SIZE, BLOCK_SIZE and BLOCKSIZE environment variables. Otherwise, units default to 1024 bytes (or 512 if POSIXLY_CORRECT is set). SIZE is an integer and optional unit (example: 10M is 10*1024*1024). Units are K, M, G, T, P, E, Z, Y (powers of 1024) or KB, MB, ... (powers of 1000). FIELD_LIST is a comma-separated list of columns to be included. Valid field names are: 'source', 'fstype', 'itotal', 'iused', 'iavail', 'ipcent', 'size', 'used', 'avail', 'pcent', 'file' and 'target' (see info page). |
