fuser(1M)fuser(1M)NAMEfuser - list processes using a file or file structure
file ... file ...] ...
The 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:
file is current directory of the process.
file is the root directory of the process, as set up by the
command (see chroot(1M)).
The process has
The process has
file memory mapped.
file is the text file of the process.
The process IDs associated with each file are printed to standard out‐
put 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.
has the following options:
Display the use of a mount point and any file beneath that
mount point. Each file must be a file system mount
Display the use of the named file only,
not the files beneath it if it is a mounted file system.
This is the default.
Display the login user name in parentheses following each
signal to each process using each file. You must have
appropriate privileges to kill processes that you do not
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.
has the following operand:
file One of the following values:
· With the option, the name of a file.
· With the option, the name of a mounted file system or
· With the option, the name of a file system mount
You can use with NFS file systems or files. If the file name is in the
format used in to identify an NFS file system, treats the NFS file sys‐
tem as a block special device and identifies any process using that
If contact with an NFS file system is lost, 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 sys‐
Terminate all processes that are preventing disk drive 1 from being
unmounted, listing the process ID and login name of each process being
List process IDs and login names of processes that have the password
Combine both the above examples into a single command line.
If the device is mounted on directory list the process IDs and login
names of processes using the device. Alternately, if is the mount
point for an NFS file system, list process IDs and login names of pro‐
cesses using that NFS file system.
If 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
SEE ALSOps(1), mount(1M), kill(2), signal(2).