$ fuser -m -u /mnt/usb1 /mnt/usb1: 1347c(root) 1348c(guido) 1349c(guido)
The command displays the process identifiers 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:
- current directory.
- executable being run.
- open file.
- open file for writing.
- root directory.
- mmap'ed file or shared library
The command can also be used to check what processes are using a network port:
$ fuser -v -n tcp 80 USER PID ACCESS COMMAND 80/tcp: root 3067 F.... (root)httpd apache 3096 F.... (apache)httpd apache 3097 F.... (apache)httpd
The command 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.
- kills all process accessing a file. For example fuser -k /path/to/your/filename kills all processes accessing this directory without confirmation. Use -i for confirmation
- interactive mode. Prompt before killing process
- append username
- display all files
- name specifies a 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 file is specified, it is automatically changed to name/. to use any file system that might be mounted on that directory.
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'
- 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)
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