diff --git a/technology/linux/filesystems/Ceph.md b/technology/linux/filesystems/Ceph.md
index 9787d41..25f9c86 100644
--- a/technology/linux/filesystems/Ceph.md
+++ b/technology/linux/filesystems/Ceph.md
@@ -64,14 +64,34 @@ Add a new host:
 ceph orch host add <hostname> <host_ip> --label _admin
 ```
 
+## OSD Managemenent
+#todo -> https://docs.ceph.com/en/reef/mgr/diskprediction
+#todo -> https://docs.ceph.com/en/reef/rados/operations/add-or-rm-osds/
 
-## Mount
+## User Management
+#todo -> https://docs.ceph.com/en/reef/rados/operations/user-management/
+
+## Pools
+#todo -> https://docs.ceph.com/en/reef/rados/operations/pools/
+
+### Replicated
+
+### Erasure Coding
+#todo -> https://docs.ceph.com/en/reef/rados/operations/erasure-code/
+
+### CRUSH Maps
+#todo -> https://docs.ceph.com/en/reef/rados/operations/crush-map/
+
+## CephFS
+#todo -> https://docs.ceph.com/en/reef/cephfs/#
+
+### Mount
 
 `mount -t ceph <MON_IP>:/ /mnt -o name=admin,secret=<SECRET>`
 
 Secret can be found in the keyring at `/etc/ceph`
 
-## Snapshots
+### Snapshots
 Ceph can take directory scoped snapshots of the filesystem.
 
 Snapshots of the directory will be stored in `.snap`.
@@ -79,3 +99,9 @@ Snapshots of the directory will be stored in `.snap`.
 **Create a new snapshot**: `mkdir .snap/snap_name`
 
 **Remove a snapshot**: `rmdir .snap/snap_name`
+
+## Block Device (RBD)
+#todo -> https://docs.ceph.com/en/reef/rbd/
+
+## Object Gateway (S3)
+#todo -> https://docs.ceph.com/en/reef/radosgw/