xclock

Xclock is a command line tool used in UNIX or Linux operating systems to display a digital or analog clock on the screen. It provides a graphical representation of time and is commonly used for testing display capabilities. The tool is part of the X Window System and can be launched from the command line by simply typing "xclock". It supports various options to customize the appearance, such as specifying the clock's size and position on the screen, as well as the font and color scheme. Additionally, xclock can be used to set alarms and display them as pop-up reminders, making it useful for time management purposes. Being a visual tool, xclock requires an X server running to display the clock, and it can only be used on systems with X Window System installed. Overall, xclock is a straightforward command line tool to display and manage clocks in a graphical environment.