I'm looking to see if the instructions are still correct for OMV 4.0, if something need to be change please let me know. Do i need to replace Jessie and wheezy to strech?
Backup your sources.list file
cp /etc/apt/sources.list /etc/apt/sources.list.bak Add a source to the sources.list
echo deb ftp.us.debian.org/debian/ jessie main >> /etc/apt/sources.list Add another source
echo deb ftp.us.debian.org/debian/ wheezy non-free >> /etc/apt/sources.list Update your package lists
apt-get update Install the required programs...Type y when asked if you would like to proceed with the installation and hit enter
apt-get install par2 unrarAnd finally let's revert the changes made to sources list
mv -f /etc/apt/sources.list.bak /etc/apt/sources.listYou should have unrar version 4.10