onerss is a Unix command-line project which merges multiple RSS 2.0 feeds into one.

onerss aims to provide most functions with fewest options.

• Installation
• Usage
• Documentation

Runtime dependencies:

• W3C's HTML-XML-utils

Install onerss by the following commands:

make
sudo make install

By default, onerss is installed to /usr/local.

• onerss [options] [file...]

  Options:

    -p          prepend channel title to item title
    -c          set item category to channel title
    -t <title>  set title of merged channel
    -d <desc>   set description of merged channel
    -l <link>   set link of merged channel
  

• onerss --help

  Print the usage

• onerss --version

  Print the version

See <https://www.dyx.name/notes/onerss.html>. It contains a lot of examples, from the simplest merging task to the most complicated one.