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Description of problem:

dnf man page has following example:

  dnf alias add update="\update --skip-broken --disableexcludes=all --obsoletes"

however this example doesn't work.

1. the command above should be working
2. man page should explain the \ notation

# dnf update
No such command: \update. Please use /usr/bin/dnf --help


Version-Release number of selected component (if applicable):
dnf-4.0.9.2-4.el8.noarch

This exists for Fedora 31 as well.

$ sudo dnf alias add update='\update --skip-broken --disablerepo=cpe*'
Aliases added: update
$ sudo dnf update
No such command: \update. Please use /usr/bin/dnf --help
It could be a DNF plugin command, try: "dnf install 'dnf-command(\update)'"

The bug was added here:

https://github.com/rpm-software-management/dnf/commit/de40e3f7e910d5533dfbcc377807caaae115ed3e#diff-2339c4fbfa8c377ad060248f420a3edbL168-L177

PR that fixes the '\' processing (thank you, Brandon!): https://github.com/rpm-software-management/dnf/pull/1553
PR that adds explanation to the documentation: https://github.com/rpm-software-management/dnf/pull/1557
Tests: https://github.com/rpm-software-management/ci-dnf-stack/pull/738

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2020:1823