CLI Tools

RPM
- rpm - basic command for interacting with installed RPMs or RPM files
- yum/dnf - front end for rpm, handles repositories
- yum-utils - collection of several related tools
- repoquery - part of yum-utils, query repositories
DEB
- dpkg - basic command for interacting with installed DEBs or DEB files
- apt - front end for dpkg, handles repositories
- aptitude - ncurses and CLI front end for apt
- synaptic - graphically front end for apt
- https://www.debian.org/doc/manuals/debian-faq/ch-pkgtools.en.html

Tasks

install package

RPM
- rpm -i $pkg
- yum localinstall $pkg
- yum install $pkg
DEB
- dpkg $pkg
- apt-get install $pkg

update package

rpm -u
yum update

uninstall package

rpm -e
yum erase

basic package query

rpm -q $pkg

show package information

rpm -qi $pkg
yum info $pkg

list all installed packages

rpm -qa

what package owns file

rpm -qf

show package config files

rpm ‐qc packagename

show all files from package

rpm ‐ql packagename

list available updates

yum check‐updates

lists all packages that provide $thing. could be a file, a package name, or a capability

yum provides $thing

clears all yum caches (except for disabled/removed repos)

yum clean all

package signing

RPMs are signed with GPG keys
Repositories usually place their keys in /etc/pki/rpm‐gpg.
Yum will bug you to accept a key if you haven't already imported it into the RPM keyring.

package signing keys

rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

version strings

NEVRA - name, epoch, version, release, arch
semantic

shared libraires versus bundled libraries