Some Usages of fuser on Linux Systems

Command fuser allows us to  identify processes using files or sockets. Here are some example usages of fuser.

1. Identify processes using a file or directory:

fuser -v /path/to/the/fileORdirectory

2. Identify processes using a particular TCP/UDP port#:

fuser -v -n tcp port#

where option -n enables us to specify an object in a different name space, tcp port# here.

3. Kill processes that are executing a particular command:

fuser -v -k -i /path/to/the/command

where option -i specifies asking the user for confirmation before killing a process.

4. Kill processes using a particular TCP/UDP port#:

fuser -v -k -i -n tcp port#