cvs software package provides Concurrent Versions System, you can install in your Debian 7 (Wheezy) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install cvs
cvs is installed in your system.
Make ensure the cvs package were installed using the commands given below,
$ sudo dpkg-query -l | grep cvs *
You will get with cvs package name, version, architecture and description in a table
| Distro | Debian 7 wheezy |
| Section | Version Control Systems |
| Package | cvs |
| Version | 2:1.12.13+real-9 |
| Description | Concurrent Versions System |
| Sub Section | vcs |