When using FTP, why might programs and files fail to transfer properly?

Note: When you have a choice between using secure FTP (SFTP) or FTP, you should choose SFTP. For more information, see What is SFTP, and how do I use it to transfer files?

When using FTP, files in any format other than plain ASCII text (e.g., executable files, compressed files, or images) must be transferred as binary files. To do this with most command line FTP clients (e.g., when running FTP from the DOS or Unix shell prompt), at the ftp> prompt, enter:

With Kermit, at the Kermit prompt, enter:

With Zmodem, use the -b flag to specify a binary transfer.

Graphic FTP clients like Transmit and Hummingbird FTP typically have options that allow you to specify a binary transfer.

Be aware that you usually cannot transfer and run a program from one operating system to another. For example, you can't run a DOS program in Unix, nor a program compiled for IRIX in AIX (e.g., Libra). Also, some programs will not run unless you also transfer all of their support programs, libraries, and preference files.

Additionally, if the server only accepts SFTP connections, attempts to use FTP to transfer files will fail.

At Indiana University, to get support for personal or departmental Linux or Unix systems, see At IU, how do I get support for Linux or Unix?

Also see:

• With FTP from DOS, how do I transfer files?
• In Mac OS or Mac OS X, how do I use Transmit 2.x and earlier to transfer files between computers?
• In Mac OS or Mac OS X, what should I do if Transmit isn't decoding files I download?