gesftpserver software package provides sftp server submodule for OpenSSH, 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 gesftpserver
gesftpserver is installed in your system.
Make ensure the gesftpserver package were installed using the commands given below,
$ sudo dpkg-query -l | grep gesftpserver *
You will get with gesftpserver package name, version, architecture and description in a table
| Distro | Debian 7 wheezy |
| Section | Utilities |
| Package | gesftpserver |
| Version | 0.1-3 |
| Description | sftp server submodule for OpenSSH |
| Sub Section | Utils |