Firemon — Monitoring program for processes started in a Firejail sandbox.


firemon [Options] [PID]


Firemon monitors programs started in a Firejail sandbox. Without a PID specified, all processes started by Firejail are monitored. Descendants of these processes are also being monitored. On Grsecurity systems only root user can run this program.



Print AppArmor confinement status for each sandbox.


Print ARP table for each sandbox.


Print capabilities configuration for each sandbox.


Print control group information for each sandbox.


Print CPU affinity for each sandbox.

-?, --help

Print options end exit.


Print network interface information for each sandbox.


List all sandboxes.


Print information only about named sandbox.


Monitor network statistics for sandboxes creating a new network namespace.


Enable line wrapping in terminals. By default the lines are trimmed.


Print route table for each sandbox.


Print seccomp configuration for each sandbox.


Monitor the most CPU-intensive sandboxes. This command  is similar to the regular UNIX top command, however it applies only to sandboxes.


Print a tree of all sandboxed processes.


Print program version and exit.


Print X11 display number.

The format for each listed sandbox entry is as follows:

PID:USER:Sandbox Name:Command

Listed below are the available fields (columns) in various firemon commands in alphabetical order:


Command used to start the sandbox.


CPU usage, the sandbox share of the elapsed CPU time since the last screen update


Unique process ID for the task controlling the sandbox.


Number of processes running in sandbox, including the controlling process.


Resident Memory Size (KiB), sandbox non-swapped physical memory. It is a sum of the RES values for all processes running in the sandbox.

Sandbox Name

The name of the sandbox, if any.


Shared Memory Size (KiB), it reflects memory shared with other processes. It is a sum of the SHR values for all processes running in the sandbox, including the controlling process.


Sandbox running time in hours:minutes:seconds format.


The owner of the sandbox.


This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.


See Also

firejail(1), firecfg(1), firejail-profile(5), firejail-login(5) firejail-users(5)

Referenced By

firecfg(1), firejail(1), firejail-login(5), firejail-profile(5), firejail-users(5).

Jul 2019 0.9.57 firemon man page