Package: lftp

"lftp" package binaries on CentOS:

/usr/bin/lftp /usr/bin/lftpget

You may install this package on CentOS with yum install lftp

"lftp" package binaries on Debian:

/usr/bin/lftp /usr/bin/lftpget

You may install this package on Debian with apt-get install lftp