SHELL

ubuntu list latest installed packages

apt list --installed | grep [name]

find installed packages in ubuntu

# This returns only the manually installed packages and only the package name (no extra info etc)
comm -23 <(apt-mark showmanual | sort -u) <(gzip -dc /var/log/installer/initial-status.gz | sed -n 's/^Package: //p' | sort -u)

How to list manually installed packages in ubuntu

comm -23 <(apt-mark showmanual | sort -u) <(gzip -dc /var/log/installer/initial-status.gz | sed -n 's/^Package: //p' | sort -u)