ftp and telnet are disabled for security reasons. Secure
versions of these programs are available.
ftp has been replaced by Secure Copy(scp) uses the same syntax as
the older Remote Copy (rcp) program.
The Tape Archive program (tar) is used to create a single file
from many files. Tar files are not smaller (compressed) than the
original files, they are the union of all files archived. To
compress tar files, use gzip or compress after creation.