also: じかリン
noun
direct link; direct linking
Internet slang for linking directly to a file or page, often bypassing a main site or hotlinking. Used as a noun or suru-verb.
画像を直リンされるとサーバーに負荷がかかる。
When images are hotlinked, it puts a load on the server.
このサイトは直リン禁止です。
Direct linking is prohibited on this site.
リンク is the general term for a hyperlink; 直リン specifically means a direct link, often with a nuance of bypassing a homepage or hotlinking.
直結 means 'direct connection' in a broader sense (e.g., hardware, relationships); 直リン is limited to internet links.
Abbreviation of 直接リンク (direct link). The kanji 直 can be read ちょく or じか, both meaning 'direct'.