genfstab:tldr:476f9

The command you provided is used to generate a file system table (fstab) entry in Linux. Here's a breakdown of the command:

1. genfstab: This is the command that generates the fstab entry.
2. -U: This option specifies that the UUID (Universal Unique Identifier) of the file systems should be used instead of device names.
3. ${-mnt}: This is a placeholder for the mount point directory where the file system is mounted. It refers to a variable, but without additional context, it is difficult to determine its specific value.
4. >>: This is a redirection operator that appends the output of the command to a file.
5. ${-mnt-etc-fstab}: This is another placeholder referring to a file path. It indicates the location and name of the fstab file where the generated entry should be appended. Again, without specific values, it is hard to determine the exact path.

In summary, the command generates a fstab entry for a file system using its UUID and appends it to the specified fstab file. The specific mount point directory and fstab file path are represented as variables in the command.