The original ICQ client does not currently run on Linux. Fortunately, there are clones that do run on Linux
and offer the ICQ service to users.
A popular ICQ program is Licq available from http://licq.wibble.net.Another popular one is Micq available at http://micq.chatzone.org. Other ICQ programs are also available forLinux. This is licq:
"Windows Linux Tips: ICQ on Linux"
Reference : techpraveen.com