I would like to know if packages will still get updated in Ubuntu if I remove the meta package that owned it.for example, I would like to remove the hexchat from Ubuntu mate, but it also gets the ubuntu-mate-meta package removed, do other packaged under ubuntu-mate-meta still get updates?
Do applications update without meta packages?
ubuntu;apt;package management;dpkg
Any package installed with a distribution's package manager will continue to receive updates (assuming updates are made available), regardless of how it was installed. So in your case, all the packages pulled in by ubuntu-mate-meta will continue to receive updates, even if you remove ubuntu-mate-meta.Note that you'll probably need to mark all those packages as non-automatically installed, using aptitude (the m key) or apt-mark manual, if you want to avoid them being removed next time you run apt-get auto-remove or something similar.Incidentally, ubuntu-mate-meta wasn't removed because the package manager reckoned it was unused; it was removed because it depends on hexchat, so it can't remain installed if hexchat is removed  if you tell the package manager to remove hexchat, it assumes you really want that and will remove ubuntu-mate-meta (after asking for confirmation).