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APT *can not* be used to install packages on Fedora, you *have to use DNF* instead.
| APT command | DNF command | notes

| `apt update`

`apt-get update`

| `dnf check-update`
| This command is rarely needed, as dnf updates its package cache automatically when it is stale. A cache update can be forced by appending `--refresh` to other commands, e.g. `dnf upgrade --refresh`

| `apt upgrade`

`apt-get upgrade`

| `dnf upgrade`

| `apt full-upgrade`

`apt-get dist-upgrade`

| `dnf distro-sync` or

`dnf system-upgrade` (see note)

| While `distro-sync` is the most direct functional equivalent, `dnf system-upgrade` should be used to upgrade from one release to another, e.g. from Fedora 31 to 32. This is a multi-step process as described xref:dnf-system-upgrade.adoc[here].

| `apt remove`

`apt-get remove`

| `dnf remove`

| `apt purge`

`apt-get purge`

| ---

| `apt autoremove`

`apt-get autoremove`

| `dnf autoremove`

| `apt search`

`apt-cache search`

| `dnf search`

APT command equivalents on Fedora with DNF
APT is the package manager/dependency solver for the Debian ecosystem, i.e. it manages `.deb` packages installed by the DPKG program. Fedora software is based on `.rpm` packages, and thus uses DNF, the package manager/dependency solver for the RPM program, instead. This document gives a brief overview of the most common APT commands one might find in tutorials and their DNF equivalents.
Apt vs DNF commands
APT vs. DNF commands
However, APT-RPM is unmaintained, broken & insecure, and so was dropped in favour of shipping the actual Debian APT software. Since APT exclusively deals with `.deb` packages, the `apt` command can no longer be used to manage Fedora packages. Its purpose is now purely as a tool for people building packages for Debian-based distributions on a Fedora system.
The `apt` command on Fedora used to - until https://fedoraproject.org/wiki/Changes/Move_apt_package_from_RPM_to_DPKG_backend[Fedora 32] - actually be APT-RPM, which basically mapped normal apt commands so that they worked with Fedora's RPM package management system.
Why is APT in the Fedora repositories?
With the exception of the distribution upgrade working differently and DNF updating the cache automatically, the commands are very similar. More info on DNF can be found xref:dnf.adoc[here].