xls2xlsx xlsfile [xlsxfile]
sudo apt-get install -y zlib1g-dev
sudo apt-get install -y libfreexl-dev
git clone https://github.com/jmcnamara/libxlsxwriter.git
cd libxlsxwriter
make
sudo make install
cd ../
git clone https://github.com/xakepsoft/xls2xlsx.git
cd xls2xlsx
make
sudo make install