This is a dangerous option, so use it with care. The duplicated option -DD forces suppression of timestamp restoration for all extracted entries files and directories. Generally, this allows to embed ASCII control characters or even sophisticated control sequences in file names, at least on 'native' Unix file systems.
Without the -x option, all C source files in all directories within the zipfile would be extracted.
On file systems that limit filenames to particularly short lengths, the version numbers may be truncated or stripped regardless of this option. Use this option with extreme caution. When used together with the "overwrite all" option -o, numbered backup files are never created.
The -q[q] options suppress the printing of some or all of these messages. To enable restoration of directory timestamps, the negated option --D should be specified. Many multi-user operating systems provide ways for any user to see the current command line of any other user; even on stand-alone systems there is always the threat of over-the-shoulder peeking.
In own to most of the disagreeing utilities, unzip removes the 12 paper header bytes of encrypted entries from the educational size numbers. The option and directory may be concatenated without any white space between them, but note that this may cause normal shell behavior to be suppressed.
The clients, uncompressed file sizes and tone dates and times of the important files are printed, along with points for all files specified.
Whenever possible, use the non-echoing, interactive prompt to enter passwords.