Why does ftp segmentation fault after a transfer completes? You may see the following problem occur with ftp. $ ftp sysa Connected to sysa. 220 sysa FTP server (Version 5.3 Wed Apr 1 14:06:38 EST 1998) ready. Name (sysa:user): 331 Password required for user. Password: 230 User user logged in. Remote system type is UNIX. Using binary mode to transfer files. ftp> get xfertest /tmp/xfertest 200 PORT command successful. 150 Opening BINARY mode data connection for xfertest (204 bytes). 226 Transfer complete. Segmentation fault (core dumped) $ The problem is caused because ftp was compiled for lightning floating point. Systems which do not have a lightning floating point co-processor will exhibit this symptom. If your system behaves like this you can download a non-lightning floating point version of ftp here: ftp://ftp.ccur.com/pub/public/RT-6000_ftp.