Snippets for yer computer needs

Package management


“Yellowdog Updater, Modified”

Create a group

yum-groups-manager -n "My Group" --id=mygroup --save=mygroups.xml --mandatory yum glibc rpm
createrepo -g /path/to/mygroups.xml /srv/my/repo

Find the package that provides a library

yum whatprovides *Xlib.h


RPM is either yum-versionlock or yum-plugin-versionlock

# add lock at current version 
yum versionlock add PACKAGE
# list locked version
yum versionlock list
# delete an entry
yum versionlock delete PACKAGE
# blow away entire versionlock file
yum versionlock clear



command desc
outdated list outdated homebrew packages
pin pin to a particular version
services formulae integration with launchctl
cleanup remove old versions of packages
switch switch between installed versions
leaves Show installed formulae with no deps


brew services list
brew services start foo

Installing from source

brew install FORMULA.rb --build-from-source


Update pkgin database

pkgin -y up

DB located at /var/db/pkg


Used in Alpine Linux

apk add
apk del
apk --no-cache


List of RPM macros

# List files in an RPM
rpm -qlp file.rpm

# Find packages that depend on a particular package
rpm -q --whatrequires ${PACKAGE}

# Get grepable info from RPM
rpm --querytags # get list of tags
rpm -q --queryformat="%{NAME}: %{LICENSE}\n" package_name

# Verify package integrity
rpm -V <package>

# Show package dependencies
rpm -qpR <.rpm file>
rpm -qR <package name>

# Install obsolete RPM
rpm -i --nodeps ./RPM

# Show RPM changelog
rpm -q --changelog <package>

Rebuild SRPM

# Centos 6
rpmbuild --rebuild <SRPM>
# also
rpm -i <SRPM>
rpmbuild -ba rpmbuild/SPECS/<spec file>

Extract RPM contents

rpm2cpio php-5.1.4-1.esp1.x86_64.rpm | cpio -idmv

Signing RPM’s with GPG

In .rpmmacros

%_signature gpg
%_gpg_name Joe Example <>
# Replace existing signature
rpm --resign package1.rpm package2.rpm ...
# Add additional sig (pre-4.1 ?)
rpm --resign package1.rpm package2.rpm ...

RPM DB rebuild

rm -f /var/lib/rpm/__db* && rpm --rebuilddb


The CLI is generally the same as YUM.

yum-plugin-versionlock is replaced with dnf-plugins-core