diff --git a/docs/linux/fs-btrfs.md b/docs/linux/fs-btrfs.md
index 8eff863..fffe4c6 100644
--- a/docs/linux/fs-btrfs.md
+++ b/docs/linux/fs-btrfs.md
@@ -5,45 +5,48 @@
 #### Create shapshot
 ```bash
 btrfs subvolume snapshot xyz xyz-snapshot-path-name
+```
 
-# or
-
+```bash
 btrfs subvolume snapshot main "main-`date +%Y-%m-%d`"
 ```
 #### Delete shapshot
 ```bash
 btrfs subvolume delete xyz-snapshot-path-name
+```
 
-# or
-
+```bash
 btrfs subvolume delete "`echo main-* | tr ' ' \\\\n | sort | head -n 1`"
 ```
+#### Set RO / RW
+```bash
+btrfs property set -f . ro false
+```
+
+```bash
+btrfs property set -f . ro true
+```
 
 ### Common
 
 #### Resize
 ```bash
 btrfs filesystem resize max /mnt/dmp/
-
-# or for view ID
-
+```
+View device ID
+```bash
 btrfs device usage /mnt/dmp/
+```
+```bash
 btrfs filesystem resize ID:max /mnt/dmp/
 ```
 #### Defragment / compress
 ```bash
 mount -o compress=zstd:15 -t /dev/sdx /mnt
-
-# or
-
+```
+```bash
 btrfs filesystem defragment -v -clzo /boot/*
-
-# or
-
+```
+```bash
 chattr +c dir
 ```
-#### Set RO / RW
-```bash
-btrfs property set -f . ro false
-btrfs property set -f . ro true
-```