Uptimed

uptimed is a daemon that keeps track of system 'uptimes' (how long a system has running between a reboot). It can be used to boast about how long a system as gone between reboots.

OpenRC
With OpenRC the uptimed daemon can be added to the default system runlevel with the following command:

This will add the daemon to start as a service whenever the system performs a full boot.

Systemd
When using systemd, issue the following command to start uptimed on the next boot:

Usage
The command will print a table with system uptime information: