Systemd is the default system manager in all major Linux-based operating systems. It provides a journald daemon that handles all messages produced by the kernel and system services. The journald daemon collects data from all available sources and stores them in a binary format for easy and dynamic manipulation. Systemd provides a command-line tool called journalctl that can be used to read and analyze journal logs. journalctl allows you to analyze and monitor the logs in real-time.