truncate

Shrink or extend the size of a file to the specified size. More information: https://www.gnu.org/software/coreutils/truncate.

• Set a size of 10 GB to an existing file, or create a new file with the specified size:
  truncate --size {{10G}} {{filename}}
• Extend the file size by 50 MiB, fill with holes (which reads as zero bytes):
  truncate --size +{{50M}} {{filename}}
• Shrink the file by 2 GiB, by removing data from the end of file:
  truncate --size -{{2G}} {{filename}}
• Empty the file's content:
  truncate --size 0 {{filename}}
• Empty the file's content, but do not create the file if it does not exist:
  truncate --no-create --size 0 {{filename}}