chronyc and chronyd: Time Synchronization Tools for Linux

chronyc is the command-line interface (CLI) utility for managing and monitoring the chronyd daemon, which is a time synchronization daemon for Linux systems. It's used to configure and control the behavior of the chronyd daemon, such as setting up time sources, adjusting the system clock, and querying time synchronization status.

chronyd, on the other hand, is the actual time synchronization daemon that runs in the background of a Linux system. It implements the Network Time Protocol (NTP) and Precision Time Protocol (PTP) to synchronize the system clock with remote time servers or other local clocks, ensuring accurate timekeeping on the system.

In summary, chronyc is the CLI utility used to interact with and manage the chronyd daemon, while chronyd is the actual daemon responsible for time synchronization on a Linux system.