change from apt-get to aptitude

[Kogler Johannes]

Hello.

As yet I've always been upgrading our Ubuntu systems with apt-get. Due
to recommandations to use aptitude instead of apt-get I would like to
update the systems by using the aptitude command for the future.

When I try to get aptitude's intended actions by "aptitude -sfy
install", I see that aptitude would delete 23 packages. These packages
are shown as automatically installed, although some packages have been
manually installed. In every action aptitude wants to remove these
packages. Is there a possiblity to change the package states of these
packages from automatically to manually installed without removing them?

Thanks for your answer!

Best regards,
Johannes Kogler