diff --git a/README.md b/README.md
index 3e03c6b..df09386 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,26 @@
 # fedora-immutable-cheatsheet
 A cheatsheet for immutable fedora variants, usually about ostree and rpm-ostree
+## system files health checking
+Finding all damaged objects. `--delete` flag will delete corrupted files and mark commits with damaged files as "partial", which then allow to redownload it.
+```bash
+ostree fsck -a
+```
+
+current deployment status
+```bash
+rpm-ostree status
+```
+
+## todo
+```bash
+ostree log fedora/38/x86_64/kinoite
+ostree pull --depth 2 fedora fedora/38/x86_64/kinoite
+ostree pull fedora fedora/38/x86_64/kinoite
+ostree admin pin 0
+ostree admin pin -u 1
+rpm-ostree rebase fedora/38/x86_64/kinoite
+rpm-ostree cleanup -p -b -r -m
+rpm-ostree usroverlay
+rpm-ostree deploy 520e744c643b85fd14817a3eb948f200e7dec902cad4157e411dfeda2c6d7aab
+ostree prune
+```