Ok - got the deployment and extension packages figured out. I had to go to the System Tree and create a package which I have to push to a Linux client install of downloading locally.
So now I guess it becomes a question of Linux administration of getting the install.sh file from my windows box to the linux server and executing.
You may well be abe to deploy agent from ePO - depending on linux flavour and setup - the McAfee Agent version you have added to ePO will have a product guide ...e.g. in MA 4.8 guide it mentions
• Enable SSH on the Linux and Macintosh client systems before installing agent from McAfee ePO.
• Comment out the following line in the /etc/sudoers file on a Red Hat operating system.
Remove the comment from the following line /etc/ssh/sshd_config file
Might be worth having a look at the gude for your version.
But there are mutiple was to copy across mapping/mount windows drive/use a tool like winscp on the ePO server etc etc etc