lsblk

The command line tool lsblk stands for "list block devices" and is used in Linux systems. It provides a detailed overview of all the block devices such as hard drives and other storage devices connected to the system.

When you run the lsblk command without any options, it lists all the block devices in a tree-like format, showing information about each device such as device name, size, and type. It also presents the device hierarchy and relationships between devices.

lsblk displays additional information about each device by using various command options. For example, using the -a option will display all devices, even those that are hidden or inactive.

By default, lsblk only shows the physical devices and important partitions. However, it can also be used to show information about virtual devices and loopback devices by using the --all option.

The output of lsblk can be customized by using different output formats, such as JSON or CSV, by using the appropriate options.

Overall, lsblk is a useful command line tool for administrators and users to quickly access and analyze information about block devices connected to their Linux system.