Each time I sudo apt-get upgrade I can see many updates from libreoffice packages. Since I have a limited memory laptop, I would like to "disable" the upgrades for all the libreoffice packages (libreoffice-writer, libreoffice-pdfimport...).
How can I achieve that?
The command sudo apt-mark hold package-name ... will keep the current version of one or more packages. For example, see PinningHowTo - Introduction to Holding Packages and How To Exclude Packages from Apt-Get Upgrade.
Presumably, "^libreoffice*" (quotes included) will select all packages beginning with libreoffice when using apt-mark, as it would with apt-get, but I wasn't able to locate an explicit example to this effect.
sudo apt-mark hold "^libreoffice*" worked, thanks :)