quotacheck:tldr:2d6b9

The command sudo quotacheck --all is used to check disk usage and enforce disk quotas on a file system.

To explain it further:

• sudo is a command that allows a user with administrative privileges to execute a command as a superuser or another user.
• quotacheck is a command used to scan a file system and collect disk usage information.
• --all is an option that instructs the quotacheck command to check all file systems listed in the /etc/fstab file.

Combining these components, the given command runs the quotacheck command with administrative privileges, scanning and collecting disk usage information for all file systems defined in the /etc/fstab file. It helps in managing and enforcing disk quotas, which are limits set on the amount of disk space a user or a group can utilize.