Format
df [–kPStv][file …]
Description
df shows
the amount of free space left on a file
system. Space can have the following values:
- Space Used
- Total amount of space allocated to existing files in the file system.
- Space Free
- Total amount of space available in file system for the creation of new files by unprivileged users.
- Space Reserved
- Space reserved by the system which is not normally available to a user.
- Total Space
- Includes space used, space free, and space reserved.
df measures space
in units of 512-byte disk sectors. You can specify a particular file
system by naming any file name on that file system. If you do not
give an argument, df reports space for all
mounted file systems known to the system, in the following format:
- File system root
- File system name
- Space available and total space
The total space reported is the space in the already allocated extents (primary and any already allocated secondary extents) of the data set that holds this file system. Therefore, the total space might increase as new extents are allocated.
- Number of free files (inodes)
This number is only meaningful for file systems created using DFSMS 1.3.0 and later. For file systems created with earlier versions of DFSMS, this number is always 4 294 967 295.
- File system status
Tip: For zFS file systems,
the df command might not provide sufficient
information to indicate whether a file system is running out of space.
For complete information about zFS space usage, use the zfsadm
aggrinfo -long command. See
z/OS Distributed File Service zFS Administration for
more information.
Options
- –k
- Uses 1024-byte (1KB) units instead of the default 512-byte units when reporting space information.
- –P
- Lists complete information about space used, in the following
order:
- File system name
- Total space
- Space used
- Space free
- Percentage of space used
- File system root
- –S
- Display SMF accounting fields.
- –t
- Display total allocated file slots, in addition to the total number of free files that are already displayed.
- –v
- Lists more detailed information about the file system status.
- File system root
- File system name
- Space available and total space
- Number of free files (inodes)
- File system status
- File system type, mode bits and device number
- File system mount parm data
- File system mount tag value
- Whether ACLs are supported by the security product and file system.
- Aggregate name, if one exists
- File system ID issuing a quiesce request
- User name and effective UID of the user who mounted the file system, if it was a nonprivileged user mount.
For systems in a shared file system environment, the following additional fields are displayed:- File system ID (owner/mounted file system server)
- File system automove status (yes-Y, no-N, include-I, exclude-E or unmount-U)
- File system client status
- System list and include/exclude indicator, if the system list exists
PFS normal status, if one exists
- PFS exception status, if one exists
Examples
If you issue a df
–v on a file system whose owner is participating in
shared file system, status information such as the following is displayed:
Mounted on Filesystem Avail/Total Files Status
/u/billyjc (OMVS.ZFS.BILLYJC) 365824/3165120 4294924769 Available
ZFS, Read/Write, Device: 17,ACLS=Y, No SUID, Exported, No Security
FSFULL(90,1)
File System owner: AQFT Automove=E Client=N
System List (Exclude): sysname1 sysname2 .... sysnameN
Quiesce Owner : AQTS Quiesce Jobname : MEGA Quiesce PID: 16777321
Filetag : T=on codeset=ISO8859-1
Aggregate Name: POSIX.ZFS.ETCLocalization
df uses
the following localization environment variables:
- LANG
- LC_ALL
- LC_CTYPE
- LC_MESSAGES
- NLSPATH
See Localization for more information.
Exit values
- 0
- Successful completion
- 1
- Failure due to any of the following:
- Inability to access filename
- Inability to access device
- device is not a device
- 2
- Incorrect command-line option
Portability
POSIX.2 User Portability Extension, X/Open Portability Guide, UNIX systems.
Related information
du, ls