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diff --git a/distribution/yocto-advanced/meta-schulung-extended/recipes-core/images/core-image-schulung.bb b/distribution/yocto-advanced/meta-schulung-extended/recipes-core/images/core-image-schulung.bb
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+++ b/distribution/yocto-advanced/meta-schulung-extended/recipes-core/images/core-image-schulung.bb
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+# use the core-image class (poky/meta/core-image.bbclass)
+inherit core-image
+
+# add package management to the image
+# (the package management type depends on PACKAGE_CLASSES)
+IMAGE_FEATURES += "package-management"
+
+# do not install any particular locales
+# (they are big and we don't need them)
+IMAGE_LINUGUAS = " "
+
+# set the size of the partition for the image
+# (see image.bbclass for related limits)
+IMAGE_ROOTFS_SIZE ?= "32768"
+
+# specify packages for the root filesystem
+# (IMAGE_INSTALL is defined in and used by core-image.bbclass
+#  for a list of packages to be installed, use = to ignore the
+#  packages added by 'packagegroup-core-boot')
+#  IMAGE_INSTALL += "hello schulung-rootfs openssh"
+IMAGE_INSTALL = "hello schulung-rootfs"
+
+# set a root password
+# inherit extrausers
+# EXTRA_USERS_PARAMS = "usermod -P foo root;"
+
+# busybox must be installed so we have access to busybox.links
+# (for DEPENDS packages, the -dev variant of the package
+#  is also installed in the sysroot)
+DEPENDS += "busybox"
+
+# create a function to create the busybox links
+# - anything copied to ${IMAGE_ROOTFS} will also appear in the root filesystem
+#   (this is set in bitbake.conf to ${WORKDIR}/rootfs)
+setup_busybox_links () {
+	for lnfile in `cat ${PKG_CONFIG_SYSROOT_DIR}${datadir}/busybox/busybox.links`; do
+		# do not create /linuxrc link, we do not need it
+		test $lnfile = /linuxrc && continue
+
+		# create parent directory if necessary
+		install -d ${IMAGE_ROOTFS}`dirname $lnfile`
+
+		# link creation is allowed to fail if a file is already there
+		ln -s ${base_bindir}/busybox ${IMAGE_ROOTFS}$lnfile || true
+	done
+}
+# ...and have it called after the rootfs task is finished
+do_rootfs[postfuncs] += "setup_busybox_links"
+
+# using "do_rootfs_append ()" as function would have the same effect