curl https://{your username}:{your password}@api.del.icio.us/v1/posts/all > bookmarks.xml curl https://{your username}:{your password}@api.del.icio.us/v1/posts/all > bookmarks.xmlIf your security setting blocks using the http://login:pwd@... format, just login to the site and use the link without the login info.
(You can also use wget instead of curl as an alternative.)