quota:tldr:96252

The command "sudo quota -u ${username}" is used to check the disk usage and limit of a specific user on a Linux system. Here is an explanation of each component:

• "sudo": It is a command used to execute a command with administrative privileges. By using "sudo," the user needs to provide their password to run the command as a superuser or any other user.
• "quota": It is a command that deals with disk quotas on Linux systems. It allows the system administrator to set and manage disk quotas for users or groups.
• "-u": This option specifies that we want to check the quota for a specific user.
• "${username}": It is a placeholder that should be replaced with the actual username of the user you want to check the quota for. For example, if you want to check the quota for the user "john," you would replace "${username}" with "john."

So, when you run "sudo quota -u ${username}" with the desired username, the command will display information about the disk usage and limits for that particular user.