Apt-cache

• apt-cache search PACKAGE_TO_SEARCH
• apt-cache policy List source repository configured included priorities of each source.
• apt-cache showpkg PACKAGE_NAME (includes package dependencies)

See also: apt show PACKAGE_NAMEdpkg -s PACKAGE_NAME

• apt-cache show PACKAGE_NAME
• apt-cache depends PACKAGE_NAME
• apt-cache rdepends PACKAGE_NAME
• apt changelog PACKAGE_NAME
• apt-cache madison

See also

• APT: wajig, apt-cache, add-apt-repository PPA, apt [ install | remove |purge | show | list | changelog | update | upgrade], do-release-upgrade, apt-mark, apt full-upgrade, sources.list, APT Automatic updates, unattended-upgrade, apt-transport-https, apt-get update, /etc/apt/, /etc/apt/apt.conf.d/50unattended-upgrades, /etc/apt/apt.conf.d/, /etc/apt/apt.conf.d/20auto-upgrades, apt-file, apt-utils
• RPM, YUM, DNF, rpm-ostree, rpm -qi, rpm -q, rpm -ql, up2date, rpm -qf, /etc/rpm-ostreed.conf, rpm2cpio, rpmfind.net

http://manpages.ubuntu.com/manpages/xenial/man8/apt-cache.8.html#options