wget(1) --no-verbose --no-parent --recursive \ --no-host-directories --no-clobber --continue \ --reject "index.html*" "https://example.com/cool-stuff/"
The non-interactive network downloader
    Turn off verbose without being completely quiet (use -q for that), which means that error messages
    and basic information still get printed.
    Do not ever ascend to the parent directory when retrieving recursively.  This is a useful option,
    since it guarantees that only the files below a certain hierarchy will be downloaded.
Recursive Retrieval Options
        Turn on recursive retrieving.    The default maximum depth is 5.
wget [option]... [URL]...
    If a file is downloaded more than once in the same directory, Wget's behavior depends on a few
    options, including -nc.  In certain cases, the local file will be clobbered, or overwritten, upon
    repeated download.  In other cases it will be preserved.

    When running Wget without -N, -nc, -r, or -p, downloading the same file in the same directory will
    result in the original copy of file being preserved and the second copy being named file.1.  If that
    file is downloaded yet again, the third copy will be named file.2, and so on.  (This is also the
    behavior with -nd, even if -r or -p are in effect.)  When -nc is specified, this behavior is
    suppressed, and Wget will refuse to download newer copies of file.  Therefore, ""no-clobber"" is
    actually a misnomer in this mode---it's not clobbering that's prevented (as the numeric suffixes were
    already preventing clobbering), but rather the multiple version saving that's prevented.

    When running Wget with -r or -p, but without -N, -nd, or -nc, re-downloading a file will result in
    the new copy simply overwriting the old.  Adding -nc will prevent this behavior, instead causing the
    original version to be preserved and any newer copies on the server to be ignored.

    When running Wget with -N, with or without -r or -p, the decision as to whether or not to download a
    newer copy of a file depends on the local and remote timestamp and size of the file.  -nc may not be
    specified at the same time as -N.

    Note that when -nc is specified, files with the suffixes .html or .htm will be loaded from the local
    disk and parsed as if they had been retrieved from the Web.
    Continue getting a partially-downloaded file.  This is useful when you want to finish up a download
    started by a previous instance of Wget, or by another program.  For instance:
source manpages: wget