I want to download many filetypes .dat, .hea, ... I did not find any piece of evidence for the structure -A .dat|.hea. Commandswget -r -l1 --no-parent -A .dat https://www.physionet.org/physiobank/database/nsrdb/wget -r -l1 --no-parent -A .hea https://www.physionet.org/physiobank/database/nsrdb/wget -r -l1 --no-parent -A .hea- https://www.physionet.org/physiobank/database/nsrdb/wget -r -l1 --no-parent -A .hea-- https://www.physionet.org/physiobank/database/nsrdb/wget -r -l1 --no-parent -A .xws https://www.physionet.org/physiobank/database/nsrdb/wget -r -l1 --no-parent -A .atr https://www.physionet.org/physiobank/database/nsrdb/wget -r -l1 --no-parent -A .atr- https://www.physionet.org/physiobank/database/nsrdb/Debian: 8.5Wget: GNU Wget 1.16 built on linux-gnu     
How to combine these wgets?
wget
The -A and -R options take a comma separated list. e.g. wget -r -R -l1 --no-parent -A .dat,.haa,.hea-,.hea--,.xws,.atr,.atr- https://www.physionet.org/physiobank/database/nsrdb/From the man page-A acclist --accept acclist-R rejlist --reject rejlist Specify comma-separated lists of file name suffixes or patterns to accept or reject. Note that if any of the  wildcard characters, *, ?, [ or ], appear in an element of acclist or  rejlist, it will be treated as a pattern, rather than a suffix.