systemd-analyze

systemd-analyze is a command-line tool used in Linux systems that provides various functionalities for managing the systemd initialization system. It allows users to analyze and measure the system's boot time and identify services that contribute to the boot process. systemd-analyze can display details such as the overall boot time, time taken by each service, and critical chain of services.

By simply running "systemd-analyze" in the terminal, users can obtain a summary of the system's boot time, including how much time was spent in the kernel and userspace. Additionally, it can provide information about the time taken for specific units and even display a plot of the overall boot process timeline.

It also offers the ability to enable system call tracing to analyze the runtime behavior of processes. This feature aids in debugging specific services or pinpointing performance bottlenecks during boot or runtime.

Furthermore, systemd-analyze has diagnostic capabilities, such as identifying services that didn't start properly or flagging potential issues related to dependencies or resource allocation.

In summary, systemd-analyze is a powerful command-line utility that assists in boot time optimization, systemd service analysis, and troubleshooting system initialization issues in Linux systems.