It's not an embedded Linux Distribution, It creates a custom one for you.

• Books
• Development tools
• Documentation
• Layers
• Services
• Online courses
• Presentations
• Trainings

• Embedded Linux Development using Yocto Projects (2nd edition, 2017) - Short 162 pages long read.
• Embedded Linux Development Using Yocto Project Cookbook (2nd edition, 2018) - 456 pages long read.
• Embedded Linux Development with Yocto Project (2014) - Short 142 pages long read.
• Embedded Linux Projects Using Yocto Project Cookbook (2015) - 324 pages long read.
• Embedded Linux Systems with the Yocto Project (2016) - 480 pages long read.
• Learning Embedded Linux Using the Yocto Project (2015) - 334 pages long read.
• Yocto for BeagleBone Black (2015) - Short 144 pages long read specific to the BeagleBone Black.
• Yocto for Raspberry Pi (2016) - Short 214 pages long read specific to the Raspberry Pi.

• autobuilder-worker-prereq-tests - Checks if all needed configuration is present on new autobuilder workers.
• bitbake-prserv-tool.
• bitbake-whatchanged - Print what will be done between the current and last builds.
• buildhistory-collect-srcrevs - Collects recorded SRCREV values from buildhistory and reports on them.
• buildhistory-diff - Reports significant differences in the buildhistory repository since a specific revision.
• buildstats-diff - Compares buildstats from two different builds.
• combo-layer.
• combo-layer-hook-default.sh.
• contrib
  • bbperf/bb-matrix-plot.sh - Generates tree views from .dat files generated with bb-matrix.sh.
  • bbperf/bb-matrix.sh - Generates .dat file with image build statistics (core-image-sato) considering all combinations of BB_RANGE and PM_RANGE values.
  • bbperf/buildstats-plot.sh - Visualizes data generated with buildstats.sh .
  • bbperf/buildstats.sh - Generates statstics about builds.
  • bbvars.py - Checks for undocumented variables.
  • build-perf-test-wrapper.sh - Initializes build environment, runs oe-build-perf-test and archives the results.
  • ddimage - Writes an image to a device.
  • devtools-stress - Stress tests devtools.
  • dialog-power-control.
  • documentation-audit.sh - Performs an audit of which packages provide documentation and which are missing -doc packages.
  • graph-tool.
  • list-packageconfig-flags.py - List info w.r.t. PACKAGECONFIG flags and recipes.
  • oe-build-perf-report-email.py - Sends build performance test report via email.
  • patchreview.py.
  • patchtest.sh.
  • serdevtry.
  • test_build_time.sh - Regression test build performance.
  • uncovered - Finds python modules uncovered by oe-seltest.
  • verify-homepage - Verifies HOMEPAGE values for all recipes in the current configuration.
• cp-noerror - Copies directories recursively.
• create-pull-request - Prepare a series of patches and a cover letter in an appropriate and consistent format for submission to Open Embedded and The Yocto Project, as well as to related projects and layers.
• crosstap - Builds a systemtap script for a given image, kernel.
• devtool - OpenEmbedded Development tool.
• oe-build-perf-report - Generates build performance test results.
• oe-build-perf-test - Tests build performance.
• oe-check-sstate - Queries which tasks will be restored from sstate.
• oe-depends-dot.
• oe-git-archive - Commits data to git and pushes upstream.
• oe-git-proxy.
• oe-pkgdata-util.
• oe-publish-sdk.
• oe-pylint - Runs pylint3 against our common python module spaces and print a report of potential issues (for Yocto Project development).
• oe-run-native.
• oe-selftest - Executes automated tests for different bitbake tools (for Yocto Project development).
• oe-test - OpenEmbedded test tool (For Yocto Project development).
• oe-trim-schemas - Removes unneeded schema locale translations from gconf schema files.
• opkg-query-helper.py - opkg query helper utility.
• pybootchartgui - Visualizes and analyzes the GNU/Linux boot process.
• pythondeps - Determines dependencies of python scripts or available python modules in a search path.
• recipetool - Creates recipes.
• relocate_sdk.py - Called by the SDK installer script, replaces the dynamic loader path in all binaries and also fixes the SYSDIR paths/lengths and the location of ld.so.cache in the dynamic loader binary.
• resulttool - Manipulates (merge, etc.) OEQA test result json files.
• rootfs_rpm-extract-postinst.awk.
• rpm2cpio.sh.
• runqemu - Handles running OE images standalone with QEMU.
• runqemu-addptable2image - Adds a partion table to an ext2 image file.
• runqemu-export-rootfs.
• runqemu-extract-sdk - Extracts an SDK image tarball using pseudo, and stores the pseudo database in var/pseudo within the rootfs.
• runqemu-gen-tapdevs - Creates a "bank" of tap network devices that can be used by the runqemu script.
• runqemu-ifdown - QEMU network configuration script to bring down tap devices.
• runqemu-ifup - QEMU network interface configuration script to bring up single tap device (alternative to runqemu-gen-tapdevs).
• send-error-report - Sends an error report (if the report-error class was enabled) to a remote server.
• send-pull-request - Sends a patch series prepared by the create-pull-request script to Open Embedded and The Yocto Project, as well as to related projects and layers.
• sstate-cache-management.sh - sstate cache management utilities to e.g. remove dublicated files.
• sstate-diff-machines.sh - Compares sstate checksums between MACHINES.
• sstate-sysroot-cruft.sh - Used to find files installed in sysroot which are not tracked by sstate manifest.
• sysroot-relativelinks.py - Takes a sysroot directory and turns all the abolute symlinks and turns them into relative ones such that the sysroot is usable within another system.
• task-time - Reports time consumed for one or more task.
• test-reexec - Tests w.r.t. task re-execution.
• test-remote-image - Tests public autobuilder images on remote hardware.
• tiny
  • dirsize.py - Displays details of the root filesystem size, broken up by directory.
  • ksize.py - Displays details of the kernel build size.
  • ksum - Generates a combined summary of vmlinux and module sizes for a built kernel, as a quick tool for comparing the overall effects of systemic tinification changes.
• verify-bashisms - Verifies bash code.
• wic - Generates bootable images.
• yocto-check-layer - Checks layer in a potentially contaminated environment.
• yocto-check-layer-wrapper - Checks layer in a clean environment.

• Yocto Project Quick Build
• What I Wish I'd Known
• Transitioning to a Custom Environment

• Yocto Project Overview and Concepts Manual
• Yocto Project Development Tasks Manual
• Yocto Project Board Support Package (BSP) Developer's Guide
• Yocto Project Profiling and Tracing Manual
• Yocto Project Linux Kernel Development Manual
• Yocto Project Application Development and the Extensible Software Development Kit (eSDK)

• Toaster User Manual
• BitBake User Manual

• Yocto Project Reference Manual
• Yocto Project Mega Manual

• Yocto Project Wiki

• Raspberry Pi with embedded Linux made by Yocto (Udemy).
• Yocto Embedded Linux with the Raspberry Pi (Udemy).

• OpenEmbedded Layers Index.
• OpenEmbedded Layer Index - Distros.
• OpenEmbedded Layer Index - Classes.
• OpenEmbedded Layers Index - Machines.

• RunSafe’s Alkemist - Remotely deployable binary runtime application self-protection (RASP) and Moving Target Defense (MTD) methods to immunize Yocto distributions.

• Buildroot vs Yocto: Differences for Your Daily Job (Embedded Linux Conference Europe) slides / video.
• Building Container Images with OpenEmbedded and the Yocto Project slides / video - About build bootstrap containers, Alpine-like container images, application container images and nested application sandboxes.
• Debian and Yocto: State of the Art (Embedded Linux Conference) slides / video - About nneta-elbe, isar, meta-debian and meta-eid.
• Living on master: Using Yocto Project, Jenkins and LAVA for a rolling release (Embedded Linux Conference) slides / video.
• OpenEmbedded/Yocto on RISC-V - New Kid on the Block (Embedded Linux Conference) slides / video.
• Real-World Yocto: Getting the Most out of Your Build System slides / video.
• poky-tiny and Beyond, or Trying to put the Yocto in Yocto Project (Embedded Linux Conference) slides.
• Creating Your Own Tiny Linux Distribution Using Yocto: Keeping it Small With Poky-Tiny slides / video - About the poky-tiny and petalinux-tiny distribution based images which are small and boot fast.
• Why the Yocto Project for My IoT Project slides / video.
• Working with the Linux Kernel in the Yocto Project (Embedded Linux Conference) slides / video.

• Yocto Project on Vimeo - Playlist with very basic, short, older screencasts about workflow, toaster and hob.

• A practical guide to BitBake blog post / companion code.

• Workshop: Yocto Project, an automatic generator of embedded linux distributions slides / companion code - Shows ow to use the CROPS poky container.

• Yocto Project Developer Day.