truncate:tldr:bdb0b

The command "truncate --size 0 ${filename}" is used to truncate a file and reduce its size to zero bytes.

Here is a breakdown of the command:

• "truncate" is the command itself, a utility in Unix-like operating systems used to shrink or extend the size of a file to a specified length.
• "--size 0" is an option or flag specifying the new size of the file as zero. This option tells the "truncate" command to reduce the file's size to zero bytes.
• "${filename}" is a placeholder for the name of the file you want to truncate. You need to replace this with the actual name or path of the file you want to modify.

When you run this command, the specified file (${filename}) will be truncated, meaning all of its content will be removed, leaving an empty file of zero bytes.