fuser (Unix)
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fuser is a UNIX command used to show which processes are using a specified file, file system, or socket. For example:
# fuser -m -u /mnt/usb1 /mnt/usb1: 1347c(root) 1348c(guido) 1349c(guido)
fuser displays the PIDs of processes using the specified files or file systems. In the default display mode, each file name is followed by a letter denoting the type of access:
- c
- current directory.
- e
- executable being run.
- f
- open file.
- F
- open file for writing.
- r
- root directory.
- m
- mmap'ed file or shared library
fuser returns a non-zero code if none of the files are accessed or in case of a fatal error. If at least one access has succeeded, fuser returns zero. The output of "fuser" may be useful in diagnosing "resource busy" messages arising when attempting to unmount filesystems.
[edit] Options
- -k
- kills all process accessing a file. For example fuser -k /home/export/ganesh kills all processes accessing this directory without confirmation. Use -i for confirmation
- -i
- interactive mode. Prompt before killing process
- -v
- verbose.
- -u
- append username
- -a
- display all files
Also note that -k sends a SIGKILL to all process. Use the -signal to send a different signal. For a list of signals supported by the fuser run 'fuser -l'
[edit] Related commands
- The list of all open files and the processes that have them open can be obtained through the lsof command.
- The equivalent command on BSD operating systems is fstat(1)
[edit] External links
: identify processes using files or sockets – Linux man page
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