fuserlsof

fuserlsof is a command-line utility for Unix-like systems that combines the capabilities of the fuser and lsof tools to identify processes that have files open or are using network resources. By merging information from two established utilities, it provides a consolidated view that can simplify debugging, maintenance, and resource management.

Typically implemented as a wrapper script, fuserlsof executes fuser and lsof for a given target (file, directory, or network resource), then aggregates the results into a unified listing. It can present per-process details such as process ID, user, command name and path, along with the specific file, directory, or socket involved.

Common usage involves passing one or more targets to inspect, for example: fuserlsof /var/log/syslog. The tool may support a subset of options from the underlying utilities, including verbose output, filtering by resource type, or restricting results to a particular PID or user.

Output is designed to be readable and machine-parsable. It typically lists entries with a resource descriptor and the associated process information, sometimes with both fuser and lsof results shown side-by-side or merged into a single row per process.

Limitations include dependence on the availability and behavior of fuser and lsof on the host system, potential permission requirements (root or elevated privileges), and possible differences across Unix-like platforms. It may also omit resources not reported by either tool.

See also fuser, lsof, and related system utilities such as psmisc.