System Administration Guide: Advanced Administration

Displaying Information About Files and Disk Space

This table summarizes the commands available for displaying information about file size and disk space.

Command	Man Page	Description
`df`	df(1M)	Reports the number of free disk blocks and files.
`du`	du(1)	Summarizes disk space allocated to each subdirectory.
`find` `-size`	find(1)	Searches recursively through a directory based on the size specified with the `-size` option.
`ls` `-lh`	ls(1)	Lists the size of a file in the power of 1024.

How to Display Information About Files and Disk Space

Display information about how disk space is used by using the df command.

$ df [directory]  [-h] [-t] [-t]

`df`	With no options, lists all mounted file systems and their device names, the number of 512-byte blocks used, and the number of files.
`directory`	Specifies the directory whose file system you want to check.
`-h`	Displays disk space in the power of 1024.
`-t`	Displays the total blocks as well as the blocks used for all mounted file systems.

Examples—Displaying Information About File Size and Disk Space

In the following example, all the file systems listed are locally mounted except for /usr/dist, which is mounted remotely from the system venus.

$ df
/                  (/dev/dsk/c0t0d0s0 ):  287530 blocks    92028 files
/usr               (/dev/dsk/c0t0d0s6 ): 1020214 blocks   268550 files
/proc              (/proc             ):       0 blocks      878 files
/dev/fd            (fd                ):       0 blocks        0 files
/etc/mnttab        (mnttab            ):       0 blocks        0 files
/var/run           (swap              ):  396016 blocks     9375 files
/tmp               (swap              ):  396016 blocks     9375 files
/opt               (/dev/dsk/c0t0d0s5 ):  381552 blocks    96649 files
/export/home       (/dev/dsk/c0t0d0s7 ):  434364 blocks   108220 files
/usr/dist          (venus:/usr/dist   ):14750510 blocks  2130134 files

In the following example, file system information is displayed in 1024 bytes.

$ df -h
Filesystem             size   used  avail capacity  Mounted on
/dev/dsk/c0t0d0s0      1.9G    58M   1.8G     4%    /
/dev/dsk/c0t0d0s6      2.5G   765M   1.7G     1%    /usr
/proc                    0K     0K     0K     0%    /proc
fd                       0K     0K     0K     0%    /dev/fd
mnttab                   0K     0K     0K     0%    /etc/mnttab
swap                   2.1G    24K   2.1G     1%    /var/run
swap                   2.1G     0K   2.1G     0%    /tmp
/dev/dsk/c0t0d0s5      1.9G    12M   1.8G     1%    /opt
/dev/dsk/c0t0d0s7      1.9G    10K   1.8G     1%    /export/home

Note –

Although /proc and /tmp are local file systems, they are not UFS file systems. /proc is a PROCFS file system, /var/run and /tmp are TMPFS file systems, and /etc/mnttab is a MNTFS file system.

The following example shows a list of all mounted file systems, device names, total 512-byte blocks used, and number of files. The second line of each two-line entry displays the total number of blocks and files allocated for the file system.

$ df -t
/                  (/dev/dsk/c0t0d0s0 ):   287530 blocks    92028 files
                                  total:   385614 blocks    96832 files
/usr               (/dev/dsk/c0t0d0s6 ):  1020214 blocks   268550 files
                                  total:  2381102 blocks   300288 files
/proc              (/proc             ):        0 blocks      879 files
                                  total:        0 blocks      924 files
/dev/fd            (fd                ):        0 blocks        0 files
                                  total:        0 blocks       72 files
/etc/mnttab        (mnttab            ):        0 blocks        0 files
                                  total:        0 blocks        1 files
/var/run           (swap              ):   396112 blocks     9375 files
                                  total:   396112 blocks     9395 files
/tmp               (swap              ):   396112 blocks     9375 files
                                  total:   396128 blocks     9395 files
/opt               (/dev/dsk/c0t0d0s5 ):   381552 blocks    96649 files
                                  total:   385614 blocks    96832 files
/export/home       (/dev/dsk/c0t0d0s7 ):   434364 blocks   108220 files
                                  total:   434382 blocks   108224 files
/usr/dist          (venus:/usr/dist   ): 14750510 blocks  2130134 files
                                  total: 41225162 blocks  2482176 files