NAME [Toc] [Back]
fuser - list processes using a file or file structure
SYNOPSIS [Toc] [Back]
/usr/sbin/fuser [-c|-f] [-ku] file ... [[-] [-c|-f] [-ku] file ...] ...
DESCRIPTION [Toc] [Back]
The fuser command lists the process IDs of processes that have each
specified file open. For block special devices, all processes using
any file on that device are listed. The process ID may be followed by
a letter, identifying how the file is being used, as follows:
c file is current directory of the process.
r file is the root directory of the process, as set up by the
chroot command (see chroot(1M)).
o The process has file open.
m The process has file memory mapped.
t file is the text file of the process.
The process IDs associated with each file are printed to standard
output as a single line separated by spaces and terminated with a
single newline. All other output - the file name, the letter, and the
user name - is written to standard error.
Options [Toc] [Back]
fuser has the following options:
-c Display the use of a mount point and any file beneath that
mount point. Each file must be a file system mount point.
-f Display the use of the named file only, not the files
beneath it if it is a mounted file system. This is the
-u Display the login user name in parentheses following each
-k Send the SIGKILL signal to each process using each file.
You must have appropriate privileges to kill processes that
you do not own.
You can respecify options between groups of files. The new set of
options replaces the old set. A dash (-) by itself cancels all
options currently in force.
Operands [Toc] [Back]
fuser has the following operand:
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file One of the following values:
+ With the -f option, the name of a file.
+ With the -f option, the name of a mounted file system or
+ With the -c option, the name of a file system mount
NETWORKING FEATURES [Toc] [Back]
You can use fuser with NFS file systems or files. If the file name is
in the format used in /etc/mnttab to identify an NFS file system,
fuser treats the NFS file system as a block special device and
identifies any process using that file system.
If contact with an NFS file system is lost, fuser fails, since contact
is required to obtain the file system identification. Once the NFS
file system is recontacted, stale file handles from the previous
contact can be identified, provided that the NFS file system has the
same file system identification.
EXAMPLES [Toc] [Back]
Terminate all processes that are preventing disk drive 1 from being
unmounted, listing the process ID and login name of each process being
fuser -ku /dev/dsk/c201d1s?
List process IDs and login names of processes that have the password
fuser -u /etc/passwd
Combine both the above examples into a single command line.
fuser -ku /dev/dsk/c201d1s? - -u /etc/passwd
If the device /dev/dsk/c201d1s7 is mounted on directory /home, list
the process IDs and login names of processes using the device.
Alternately, if /home is the mount point for an NFS file system, list
process IDs and login names of processes using that NFS file system.
fuser -cu /home
If machine1:/filesystem/2mount is an NFS file system, list all
processes using any file on that file system. If it is not an NFS
file system, treat it as a regular file.
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SEE ALSO [Toc] [Back]
ps(1), mount(1M), kill(2), signal(2).
STANDARDS CONFORMANCE [Toc] [Back]
fuser: SVID2, SVID3
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