fdstat reports the number of files descriptors allocated by each process.

The information is collected from the /proc filesystem, therefore an open file may be a regular file, a directory, a block special file, a character special file, an executing text reference, a library, a stream or a network file (Internet socket, NFS file or UNIX domain socket).

Each report provides information gathered at the time of execution.

• Download the Debian package from the latest release here

• Run

  sudo dpkg -i fdstat_<version>_amd64.deb

• Download the tarball with the source code from the latest release here

• Extract the tarball

• Change to the directory containing the source code:

  cd fdstat-<version>

• Run

  make && sudo make install

Usage: fdstat [OPTION...] [INTERVAL [COUNT]]

Options:

  -c, --cmdline              Output the command line instead of the PID

  -j, --json                 Produce JSON output

  -s, --summary              Display only totals (allocated and maximum)

  -v, --verbose              Produce verbose output

  -?, --help                 Give this help list

      --usage                Give a short usage message

  -V, --version              Print program version

The INTERVAL parameter specifies the amount of time in seconds between each report. The COUNT parameter can be specified in conjunction with the INTERVAL parameter. If the COUNT parameter is specified, the value of COUNT determines the number of reports generated at INTERVAL seconds apart. If the INTERVAL parameter is specified without the COUNT parameter, the fdstat command generates reports continuously.

• List of number of currently open files and corresponding PID

  fdstat

• Continuously list of number of currently open files and corresponding PID, generating a new report every 3 seconds

  fdstat 3

• Print three reports, five seconds apart, on open files and corresponding command line

  fdstat 5 3 -c

• Show the full command line, sort the results in descending order (process with highest number of open files last)

  fdstat -c | sort -k1 -n

Report bugs to [email protected].