conmand Command in Linux

The conmand is a daemon that is responsible for managing consoles (like terminal sessions) and listens for connections from other programs. This daemon runs in the background and keeps track of consoles defined in its configuration file and listens to the request from other programs. In simple words, it acts as a bridge between the programs running on the system.

Here is a comprehensive guide to the options available with the conmand command −

Syntax for conmand Command in Linux
Different Options Available for conmand Command
Signals use in conmand Command

Syntax for conmand Command in Linux

The basic syntax to use the conmand command in Linux is given below −

conmand [options]

Different Options Available for conmand Command

With conmand, you can use different options and customize the behavior of the daemon on your Linux system. These options are described in the table provided below −

Option	Description
-c File	Specify a configuration file (overrides the default location, typically /etc/conman.conf)
-h	Display a summary of command-line options.
-k	Send a termination/closing signal to the conmand process associated with a specific configuration. It returns 0 if successful; otherwise, returns 1.
-L	Display the command’s license information.
-p port	Set the listening port for conmand, overriding defaults.
-q	Display the process ID (PID) of an active conmand configuration. It returns 0 if active; and returns 1 otherwise.
-r	Re-open the log file of daemon and individual console log files using a SIGHUP signal. It returns 0 if successful and returns 1 otherwise.
-v	Enable verbose mode.
-V	Display the command’s version information.
-z	Truncate log files at startup.

Signals use in conmand Command

The conmand daemon in Linux uses two signals that helps them manage the process effectively, these are discussed below −

SIGHUP (Hang Up)

Once the conmand process receives a SIGHUP signal, the following actions are performed −

Closes and re-opens both the individual console log files and the daemon’s log file.
Re-evaluates any conversion specifiers within filenames.

This signal is particularly useful for log rotation configurations. It allows log files to be rotated without interrupting the daemon’s operation.

SIGTERM (Terminate)

The SIGTERM signal instructs the conmand daemon to terminate gracefully and allows the daemon to perform any necessary cleanup before shutting down. When you want to stop the conmand process, use SIGTERM to allow it to wrap up its tasks and exit cleanly.

Conclusion

The conmand daemon plays a crucial role in managing consoles (such as terminal sessions) and handling connections from other programs. This daemon is preinstalled on Linux systems and can be used with various options based on your specific requirements.

In this brief tutorial, we explained all the possible options that can be used with the conmand daemon along with the signals that help manage the process. Don’t forget to start the daemon using the systemctl command in order to use its capability.

Print Page