Okay. I figured it out: I need to setenv MANPATH /usr/share/man:/usr/X11R6/man Just don't know why the system do it automatically. _________________________________________________________________ ÓëÁª»úµÄÅóÓѽøÐн»Á÷£¬ÇëʹÓà MSN Messenger: http://messenger.msn.com/cn