how to upgrade mailman

Here's are the steps to upgrade mailman:

1. Download mailman to /tmp folder
   
   wget http://ftp.gnu.org/gnu/mailman/mailman-2.1.23.tgz
2. Extract the contents
   
   tar -zxf mailman-2.1.23.tgz
3. Change folder
   
   cd mailman-2.1.23
4. Configure Package
   
   ./configure --prefix=/var/lib/mailman --with-username=list --with-groupname=list --with-cgi-gid=www-data --with-mail-gid=list
5. Install python-dnspython if not installed
   
   apt-get install python-dnspython
6. Compile package
   
   make
7. Stop mailman
   
   service mailman stop
8. upgrade mailman
   
   make install
9. Start mailman
   
   service mailman start