wget
Useful options
-P
Set local directory to which the files will go and be saved.
Example: $ wget -P ~/Download/ http://...
-b
Do it in the background mode.
-c
Ignore the files which have been already downloaded and continue from the middle of the file which was stopped downloading at the previout trial.
give user name and password
wget --user=**** --password=*****
Keyword(s):
References:[Unix/Linux入門]