By default on ThinPro OS, the APT command checks the packages only from HP ftp server, but sometimes the user want install a new package from Debian ftp server, to be able to do this user should edit source.list file.
The name of debian ftp server exists as comment, the user must remove the # at the beginning of the line.
User can also add another server name on the file in the following format:
DEB FTP://FTPSERVERNAME FOLDERNAME SUBFOLDERNAME ......
