list process IDs of all processes that have files open
fuser [ -cfu ] file …
fuser [-fMuvw] [-a|-s] [-4|-6] [-c|-m|-n space] [-k [-i] [-signal]] name...
Writes to standard output the process IDs of processes running on the local system with files open.
For block special devices (like disk partitions, sockets), all processes using any file on that device are listed.
Writes to standard error how the process is using the file :
c current directory
r root directory.
e executable being run.
f open file. f is omitted in default display mode.
F open file for writing. F is omitted in default display mode.
m mmap'ed file or shared library.
file is treated as a mount point and the utility reports on any files open in the file system.
-f report is only for the named files.
-u user name (or UID), in parentheses, is written to
|Show all files specified on the command line. |
> fuser -u /bin/bash /bin/fuser
default: only files that are accessed by at least one process are shown. not with
> fuser -a /bin/bash /bin/fuser
| Silent . |
-verbose are ignored .
Check return code: a non-zero return code if none of the specified files is accessed or in case of a fatal error
| file on a mounted file system or a block device that is mounted. |
All processes accessing files on that file system are listed.
If a directory, it is automatically changed to
NAME/. to use any file system mounted on that directory.
| only if |
Name specifies a mountpoint. Prevents killing the machine if
NAME happens to not be a filesystem.
| Same as
| processes accessing the file. SIGKILL is default |
|Kill only processes which have write access.
|for confirmation before killing a process.
Use the specified signal instead of SIGKILL can be specified either by name (e.g. -HUP) or by number (e.g. -1).
| List signal names.
Select a different name space. The name spaces file (file names, the default), udp (local UDP ports), and tcp (local TCP ports) are supported. For ports, either the port number or the symbolic name can be specified. If there is no ambiguity, the shortcut notation name/Ispace (e.g. 80/tcp ) can be used.
| display the user name of the process owner . to |
| Processes are shown in a |
ps-like style. The fields PID, USER and COMMAND are similar to ps. ACCESS shows how the process
accesses the file.
show when a particular file is being access as a mount point, knfs export or swap file. In this case kernel is shown instead of the PID.
> fuser -v -m /dev/mmcblk0p5
USER PID ACCESS COMMAND
/dev/mmcblk0p5: root kernel swap /dev/mmcblk0p3
root kernel mount /dev
dgerman 2438 f.... xstartup
dgerman 2451 f.... ck-launch-sessi
dgerman 2502 f.... lxsession
dgerman 2505 F.... dbus-launch
dgerman 2506 F.... dbus-daemon
dgerman 2512 f.... openbox
dgerman 2514 f.... lxpanel
dgerman 2516 f.... pcmanfm
dgerman 2524 f.... lxpolkit
dgerman 2527 F.... gvfsd
dgerman 2532 F.... pulseaudio
dgerman 2539 F.... gvfs-gdu-volume
dgerman 2554 F.... gvfs-afc-volume
dgerman 2557 F.... gvfs-gphoto2-vo
dgerman 2561 F.... menu-cached
dgerman 2564 F.... gvfsd-trash
> fuser -v .
USER PID ACCESS COMMAND
/home/dgerman: dgerman 2427 ..c.. Xtightvnc
dgerman 2438 ..c.. xstartup
dgerman 2451 ..c.. ck-launch-sessi
dgerman 2502 ..c.. lxsession
dgerman 2512 ..c.. openbox
dgerman 2514 ..c.. lxpanel
dgerman 2516 ..c.. pcmanfm
dgerman 2524 ..c.. lxpolkit
dgerman 4895 ..c.. bash
| Display version information.|
fuser (PSmisc) 22.19
Copyright (C) 1993-2010 Werner Almesberger and Craig Small
| Search only for IPv4/6 sockets. and only has an effect with the tcp and udp namespaces.
|Reset all options and set the signal back to SIGKILL.
When standard output and standard error are directed to the same destintion, the output is interleaved so that the
filename appears at the start of each line, followed by the process ID and characters indicating the use of the file.
Returns a non-zero return code if none of the specified files is accessed or in case of a fatal error
From DaPie (raspberry Pi)
DaPie: > sudo fuser -m /dev/mmcblk0p5
/dev/mmcblk0p5: 157 282 286 1540 1549 1828 1907 1911 1940m
DaPie:/ > sudo fuser -u -m /dev/mmcblk0p5
/dev/mmcblk0p5: 157(root) 282(root) 286(root) 1540(root) 1549(root) 1828(root) 1907(root) 1911(root) 1940m(root)
> fuser -u 2>&1 |sed "s/)/)\n/g" #make seperate lines