diff --git a/nontech/economy/people/hazin.txt b/nontech/economy/people/hazin.txt
index e67f8b22f..19aec5988 100644
--- a/nontech/economy/people/hazin.txt
+++ b/nontech/economy/people/hazin.txt
@@ -102,6 +102,8 @@ Egishyants - 2006 - Ragnarek
     https://www.economics.kiev.ua/?id=136&view=articles
 
 2024
+LawAnOrder - 04.28 - Dudnik - Hazin of 51:09
+    https://www.youtube.com/watch?v=8pffkHAyYkA
 LawAnOrder - 04.17 - Dudnik - Hazin of 50:57
     https://www.youtube.com/watch?v=tG9ixu3u4DA
 MirTV - Petkus - Hazin 04.12 of 29:23
diff --git a/os/linux/immutable/rpm-ostree.txt b/os/linux/immutable/rpm-ostree.txt
new file mode 100644
index 000000000..0aea8423a
--- /dev/null
+++ b/os/linux/immutable/rpm-ostree.txt
@@ -0,0 +1,10 @@
+https://ostreedev.github.io/ostree/
+https://ostreedev.github.io/ostree/man/
+https://ostreedev.github.io/ostree/reference/
+    ... and other stuff are from linux/packaging/ostree
+
+https://coreos.github.io/rpm-ostree/
+https://github.com/projectatomic/rpm-ostree
+
+2020
+    https://lwn.net/Articles/821367/
diff --git a/os/linux/packaging/ostree/cli.txt b/os/linux/packaging/ostree/cli.txt
index ae6a919c3..ed2f373f2 100644
--- a/os/linux/packaging/ostree/cli.txt
+++ b/os/linux/packaging/ostree/cli.txt
@@ -1,4 +1,7 @@
-https://www.collabora.com/assets/pdfs/OSTree_CLI_for_OS_management.pdf
+????
+https://linuxcommandlibrary.com/man/rpm-ostree
+Pynkin - OSTree CLI for OS management
+    https://www.collabora.com/assets/pdfs/OSTree_CLI_for_OS_management.pdf
 
 ostree
     --help
diff --git a/os/linux/packaging/ostree/ostree.txt b/os/linux/packaging/ostree/ostree.txt
index d4e748514..116dbc542 100644
--- a/os/linux/packaging/ostree/ostree.txt
+++ b/os/linux/packaging/ostree/ostree.txt
@@ -1,5 +1,9 @@
-http://ostree.readthedocs.io/en/latest/
+https://ostreedev.github.io/ostree/
+
+https://coreos.github.io/rpm-ostree/
 https://github.com/projectatomic/rpm-ostree
+
+http://ostree.readthedocs.io/en/latest/
 https://github.com/ostreedev/ostree/
 
 https://ostreedev.github.io/ostree/
@@ -14,8 +18,13 @@ https://ostreedev.github.io/ostree/repository-management/
 https://ostreedev.github.io/ostree/related-projects/
 https://ostreedev.github.io/ostree/reference/
 
+https://ostreedev.github.io/ostree/man/
 https://ostree.readthedocs.io/en/latest/manual/introduction/
 
+https://osbuild.org/docs/on-premises/commandline/building-ostree-images/
+
+2020
+https://lwn.net/Articles/821367/
 2013
 https://www.opennet.ru/opennews/art.shtml?num=37750
 https://blog.verbum.org/2013/08/26/ostree-v2013-6-released/
diff --git a/os/linux/rh/fedora/docs/whatsnew.txt b/os/linux/rh/fedora/docs/whatsnew.txt
index 7e6563085..a0daadbc2 100644
--- a/os/linux/rh/fedora/docs/whatsnew.txt
+++ b/os/linux/rh/fedora/docs/whatsnew.txt
@@ -1,3 +1,4 @@
+https://docs.fedoraproject.org/en-US/quick-docs/upgrading-fedora-new-release/
 https://www.tecmint.com/fedora-upgrade-guide/
     sudo dnf upgrade --refresh
     sudo dnf install dnf-plugin-system-upgrade
@@ -10,6 +11,7 @@ LearnLinuxTV - Fedora's 40th Release: A Quick Look and Overview 0:00 of 7:43
     https://www.youtube.com/watch?v=iuBzZPvCE-M
 https://fedoraproject.org/wiki/Releases/40/ChangeSet
     https://habr.com/ru/companies/ru_mts/articles/804069/
+    https://habr.com/ru/companies/ru_mts/articles/810067/
     https://www.opennet.ru/opennews/art.shtml?num=60852
 2022
 https://fedoramagazine.org/announcing-fedora-36/
diff --git a/os/linux/rh/fedora/inst/after-inst.txt b/os/linux/rh/fedora/inst/after-inst.txt
new file mode 100644
index 000000000..0a69331be
--- /dev/null
+++ b/os/linux/rh/fedora/inst/after-inst.txt
@@ -0,0 +1,9 @@
+2023
+https://discussion.fedoraproject.org/t/video-playback-broken-after-upgrading-to-f39-libopenh264-so-7-is-missing-openh264-support-will-be-disabled/100019
+    sudo dnf remove libswscale-free
+    l /etc/yum.repos.d/
+        ... fedora-cisco-openh264.repo
+    sudo dnf config-manager --set-enabled fedora-cisco-openh264
+
+    dnf install openh264 mpv
+    # ??? sudo dnf install ffmpeg avidemux vlc