Syntax: !gunzip infile [outfile]This will uncompress the file given as infile, which was previously compressed with gzip, and has a ``.gz'' extension. If no outfile is given, output is written to a file with the same name as the infile but with the ``.gz'' suffix stripped. Under Unix/Linux this uses 64-bit file offsets so can be applied to files larger than 2Gb, unlike some versions of the GNU gunzip utility. Unlike the GNU gunzip program, this will not delete infile.