How to Check Total Disk Space in Linux
Displaying Disk Space Statistics (df)
Use the df command to show the amount of free disk space on each mounted disk. The usable disk space that is reported by df reflects only 90 percent of full capacity, as the reporting statistics allows for 10 percent above the total available space. This head room normally stays empty for better performance.
The percentage of disk space actually reported by the df command is used space divided by usable space.
If the file system exceeds 90 percent capacity, you could transfer files to a disk that is not as full by using the cp command. Alternately, you could transfer files to a tape by using the tar or cpio commands. Or, you could remove the files.
For a detailed description of this command, see the df(1M) man page.
How to Display Disk Space Information (df -k)
- Use the df -k command to display disk space information in Kbytes.
$ df -k Filesystem kbytes used avail capacity Mounted on /dev/dsk/c0t3d0s0 192807 40231 133296 24% /
Example 11-4 Displaying File System Information
The following example shows the output from the df -k command.
$ df -k Filesystem 1024-blocks Used Available Capacity Mounted on rpool/ROOT/solaris-161 191987712 6004395 140577816 5% / /devices 0 0 0 0% /devices /dev 0 0 0 0% /dev ctfs 0 0 0 0% /system/contract proc 0 0 0 0% /proc mnttab 0 0 0 0% /etc/mnttab swap 4184236 496 4183740 1% /system/volatile objfs 0 0 0 0% /system/object sharefs 0 0 0 0% /etc/dfs/sharetab /usr/lib/libc/libc_hwcap1.so.1 146582211 6004395 140577816 5% /lib/libc.so.1 fd 0 0 0 0% /dev/fd swap 4183784 60 4183724 1% /tmp rpool/export 191987712 35 140577816 1% /export rpool/export/home 191987712 32 140577816 1% /export/home rpool/export/home/123 191987712 13108813 140577816 9% /export/home/123 rpool/export/repo 191987712 11187204 140577816 8% /export/repo rpool/export/repo2010_11 191987712 31 140577816 1% /export/repo2010_11 rpool 191987712 5238974 140577816 4% /rpool /export/home/123 153686630 13108813 140577816 9% /home/123
The following table describes the output of the df -k command.
| Field Name | Description |
|---|---|
| kbytes | Total size of usable space in the file system |
| used | Amount of space used |
| avail | Amount of space available for use |
| capacity | Amount of space used, as a percentage of the total capacity |
| mounted on | Mount point |
Example 11-5 Displaying File System Information by Using the df Command Without Any Options
When the df command is used without operands or options, it reports on all mounted file systems, as shown in the following example:
$ df / (rpool/ROOT/solaris):100715496 blocks 100715496 files /devices (/devices ): 0 blocks 0 files /dev (/dev ): 0 blocks 0 files /system/contract (ctfs ): 0 blocks 2147483601 files /proc (proc ): 0 blocks 29946 files /etc/mnttab (mnttab ): 0 blocks 0 files /system/volatile (swap ):42257568 blocks 2276112 files /system/object (objfs ): 0 blocks 2147483441 files /etc/dfs/sharetab (sharefs ): 0 blocks 2147483646 files /dev/fd (fd ): 0 blocks 0 files /tmp (swap ):42257568 blocks 2276112 files /export (rpool/export ):100715496 blocks 100715496 files /export/home (rpool/export/home ):100715496 blocks 100715496 files /export/home/admin (rpool/export/home/admin):100715496 blocks 100715496 files /rpool (rpool ):100715496 blocks 100715496 files /export/repo2010_11(rpool/export/repo2010_11):281155639 blocks 281155639 files /rpool (rpool ):281155639 blocks 281155639 files
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How to Check Total Disk Space in Linux
Source: https://docs.oracle.com/cd/E23824_01/html/821-1451/spmonitor-6.html