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sync:tldr:e830a
The command "sync ${filename}" is likely used to synchronize the contents of a file specified by the variable "filename" with a storage medium. Here is an explanation of the components:
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"sync" is a command typically used on Unix-based systems to ensure that file systems are in a consistent and stable state. It is often employed before turning off or disconnecting a storage device to prevent data loss or corruption. Running "sync" ensures that modified data in cache is saved to disk.
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"${filename}" is a placeholder for a variable that should be substituted with an actual file name. The command will work with the file specified by the value assigned to the variable.
Overall, the command "sync ${filename}" instructs the system to synchronize the data of a specific file with the underlying storage media to avoid data loss or file corruption.