libcrypt-cast5-perl software package provides CAST5 block cipher, you can install in your Ubuntu 16.10 (Yakkety Yak) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install libcrypt-cast5-perl
libcrypt-cast5-perl is installed in your system.
Make ensure the libcrypt-cast5-perl package were installed using the commands given below,
$ sudo dpkg-query -l | grep libcrypt-cast5-perl *
You will get with libcrypt-cast5-perl package name, version, architecture and description in a table
| Distro | Ubuntu 16 10 yakkety yak |
| Section | Perl |
| Package | libcrypt-cast5-perl |
| Version | 0.05-1build3 |
| Description | CAST5 block cipher |
| Sub Section | perl |