Package Managers

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YUM (Yellowdog Update Manager) & DNF

Both yum and DNF are found on RedHat based systems, and are pretty much interchangable.

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Cache & Repositories

Update cache

yum makecache

List enabled repositories

yum repolist

List all active repositories

yum repolist --all

Use specific repository:

yum --enablerepo="repoID" install packagename

Disable specific repository

yum --disablerepo="repoID" install packagename

Adding additional repositories

repositories are stored in /etc/yum.repos.d/ (for both YUM and DNF)

Searching repositories for packages and package info

The below can be used to check whether a package is available in the currently configured repositories (requires the exact package name):

dnf list packagename

The below can be used to search repositories for a keyword relating to a package - ie a part of its name or description:

dnf search packagename

or

yum list available | grep -i packagename

Retrieve information about an available package:

dnf info packagename

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Installing/Updating Packages

Install package

yum install packagename

or

dnf install packagename

remove package

yum remove packagename

or

dnf remove packagename

remove unused dependencies:

dnf autoremove

update packages

yum update

or

dnf update

update a specific package

yum update packagename

or

dnf update packagename

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APT (Advanced Package Tool) & DPKG (Debian Package)

APT is a package manager found primarily on Debian based systems.

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Cache & Repositories

Ubuntu apt uses a cache to store what can be installed/updated from repos. Before installing or updating software, it's worth checking that the cache has been recently updated to ensure that the most recent available packages are stored.

Update cache

apt update

Check when cache was last updated:

stat -c %z /var/lib/apt/periodic/update-success-stamp

Searching repositories

apt list packagename

or

apt search packagename

Adding repositories.

repositories are stored in /etc/apt/sources.list or /etc/apt/sources.list.d

Typically, you will need a key for apt to be able to use a repository. Keys will be available via the repository website.

Download the key file

Add the key to 'apt trusted keys'

apt-key add filename

Once added, create the repository file within /etc/apt/sources.list.d with a name of your choice.

Add the repository details, typically prefaced with 'deb' and then the repo URL, and then OS release version.

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Installing & Updating Packages

Install packages

apt install packagename

Install multiple packages

apt install packagename packagename packagename

Removing packages

Remove package without removing configuration files

apt remove packagename

Remove package and configuration files

apt purge packagename

Remove package dependencies

apt autoremove

Updates

(remember to apt update before hand)

Check for updates

apt list --upgradable

Run all package updates

apt upgrade

Upgrade specific package

apt upgrade packagename

Update the OS and kernel:

apt dist-upgrade

Update everything (packages and kernel)

apt full-upgrade

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openSuse - zypper

Cache & Repositories

Zypper uses a cache to store what can be installed/updated from repos. Before installing or updating software, it's worth checking that the cache has been recently updated, and if it hasn't; running an update on the cache.

update cache

zypper ref

List repositories 

zypper lr

Repositories are stored in /etc/zypp/repos.d

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Installing/ Searching/ Updating Packages

Search packages

zypper se packagename

Search specifically

zypper se --match-words packagename

or

zypper se --match-exact packagename

Install package

zypper in packagename

Remove package (only option to remove package and configuration files)

zypper rm packagename

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