To restart the systemd daemon without rebooting the Linux system when critical libraries are installed, you can use the systemctl command with the daemon-reload option. This option tells systemctl to reload the system manager configuration and all unit files, which can be useful if you have installed new libraries or made other changes that require systemd to be restarted.
Here is an example of how to use the systemctl command to restart systemd:
sudo systemctl daemon-reload
This will reload the systemd configuration and unit files, allowing you to apply any changes that were made without having to reboot the system.
Keep in mind that restarting systemd may disrupt some services that are running on the system, so it is a good idea to make sure that any important services are backed up or saved before performing this operation. It is also a good idea to inform any other users of the system before restarting systemd, as they may be affected by the disruption of services.
It is generally not recommended to restart systemd unless it is absolutely necessary, as this can cause problems with some services and may lead to data loss or other issues. However, in some cases, it may be necessary to restart systemd in order to apply changes or resolve problems with the system. In these cases, it is important to be cautious and carefully consider the implications of restarting systemd before proceeding.