Libre office installation Steps in Ubuntu

A. Remove bundled LibreOffice

LibreOffice  can be installed alongside older LibreOffice versions, but conflicts may occur.

To remove prior installations of LibreOffice:
sudo apt-get remove libreoffice-core

If you also want to remove LibreOffice configuration files, use the purge switch:
sudo apt-get remove --purge libreoffice-core

B. Install LibreOffice

Step 1 of 3 – Download compressed packages

Download LibreOffice from the official download page:www.libreoffice.org/download/

Select Linux x86 (deb) for 32 bits systems or Linux x64 (deb) for 64 bits systems.

This how-to supposes that the downloaded file (and language packs) is saved in the "Downloads" directory situated in your home directory.

Download as many language packs as you need.

Step 2 of 3 – Extract the .deb packages

The downloaded file is a compressed .tar.gz archive. In case you want to learn more about these extensions: tar, gzip. To extract this juicy archive, open the "Downloads" directory. Look for a file named:

LibreOffice_5.4.0_Linux_x86_deb.tar.gz or
LibreOffice_5.4.0_Linux_x86-64_deb.tar.gz

right-click on it and select "extract here ". Repeat the extraction process for all language packs. The .tar.gz archive(s) can now be deleted.

Step 3 of 3 – Install .deb packages

Open a terminal.
Change the current directory to the location of the .deb packages:
cd ~/Downloads/LibreOffice_5.4.0.x_Linux_x86_deb/DEBS

or for the 64 bits version:
cd ~/Downloads/LibreOffice_5.4.0.x_Linux_x86-64_deb/DEBS

(No need to write everything: use Tab ↹ to autocomplete the command line, or copy and paste with the middle-click mouse button)

Finally, install all .deb packages:
sudo dpkg -i *.deb

In case you're installing language packs, repeat the and steps cd dpkg for each language pack.

You're done! No need to restart, LibreOffice is ready to be used.

If you have problems launching LibreOffice, try out the following command:
libreoffice5.4
or
/opt/libreoffice5.4/program/soffice

If you're installing a development release (Beta) of LO 6.0, you can launch it with the following command:
lodev6.0

C. Uninstall LibreOffice

If you want to remove LibreOffice, use the following command:
sudo apt-get remove libreoffice5.4*

If you want to remove a development (beta) version of LibreOffice, use the following command:
sudo apt-get remove lodev*

​