Commands to install LibreOffice 6.4.5.2 from the Terminal in Linux Mint. Get link to most recent version from https://www.libreoffice.org/download/
# tip: cache password with "sudo ls"
# uninstall currently installed version
sudo apt-get remove libreoffice-*
sudo apt-get remove --purge libreoffice-*
# download and install LibreOffice
cd ~/Install
wget https://download.documentfoundation.org/libreoffice/stable/6.4.5/deb/x86_64/LibreOffice_6.4.5_Linux_x86-64_deb.tar.gz
tar -xvzf LibreOffice_6.4.5_Linux_x86-64_deb.tar.gz
cd LibreOffice_6.4.5.2_Linux_x86-64_deb/DEBS
sudo dpkg -i *.deb
# download and install offline help files
cd ~/Install
wget https://download.documentfoundation.org/libreoffice/stable/6.4.5/deb/x86_64/LibreOffice_6.4.5_Linux_x86-64_deb_helppack_en-US.tar.gz
tar -xvzf LibreOffice_6.4.5_Linux_x86-64_deb_helppack_en-US.tar.gz
cd LibreOffice_6.4.5.2_Linux_x86-64_deb_helppack_en-US/DEBS
sudo dpkg -i *.deb
# delete extracted installation files
rm -rf ~/Install/LibreOffice_6.4.5.2_Linux_x86-64_deb
rm -rf ~/Install/LibreOffice_6.4.5.2_Linux_x86-64_deb_helppack_en-US